Contributors: Nowaczyk, Norbert R, Frederichs, Thomas, Eisenhauer, Anton, Gard, Gunilla

Date: 1994-02-04

Abstract: Palaeomagnetic investigations of two sediment cores recovered from RV Polarstern near the eastern slope of the Yermak Plateau (sites PS1533 and PS2212) reveal convincing evidence for four polarity events of the Earth's magnetic field during the last 170 Ka. A comprehensive rock magnetic study of the sediments proved that fine-grained magnetite is the principal carrier of the remanent magnetization. No changes in magneto-mineralogy across the polarity transitions in the sediments investigated were found. Calcareous nannofossil biostratigraphy, AMS-14C (accelerated mass spectrometry) and oxygen isotope data, and 10Be and 230Th stratigraphies yielded age ranges of 24-29 Ka for the Mono Lake event, 34-43 Ka for the Laschamp event, 72-86 Ka for the Norwegian-Greenland Sea event and 118-128 Ka for the Blake event. Two reverse polarity samples at the base of core PS2212-3 KAL are interpreted as the termination of the Biwa I event (171-181 Ka). the events exhibit full inversion of inclination in both cores. the data suggest that the transition process of the Earth's magnetic field during such polarity events requires some 1 Ka. Category: geoscientificInformation Source: Supplement to: Nowaczyk, Norbert R; Frederichs, Thomas; Eisenhauer, Anton; Gard, Gunilla (1994): Magnetostratigraphic data from late Quaternary sediments from the Yermak Plateau, Arctic Ocean: evidence for four geomagnetic polarity events within the last 170 Ka of the Brunhes Chron. Geophysical Journal International, 117(2), 453-471, https://doi.org/10.1111/j.1365-246X.1994.tb03944.x Supplemental Information: Not Availble Coverage: EVENT LABEL: (PS19/245) * LATITUDE: 82.023700 * LONGITUDE: 15.672300 * DATE/TIME: 1991-09-29T00:00:00 * ELEVATION: -2531.0 m * Penetration: 8.15 m * Recovery: 8.02 m * LOCATION: Yermak Plateau * CAMPAIGN: ARK-VIII/3 * BASIS: Polarstern * DEVICE: Kasten corer...Quaternary Environment of the Eurasian North...Paleoenvironmental Reconstructions from Marine Sediments @ AWI ... Abstract: Palaeomagnetic investigations of two sediment cores recovered from RV Polarstern near the eastern slope of the Yermak Plateau (sites PS1533 and PS2212) reveal convincing evidence for four polarity events of the Earth's magnetic field during the last 170 Ka. A comprehensive rock magnetic study of the sediments proved that fine-grained magnetite is the principal carrier of the remanent magnetization. No changes in magneto-mineralogy across the polarity transitions in the sediments investigated were found. Calcareous nannofossil biostratigraphy, AMS-14C (accelerated mass spectrometry) and oxygen isotope data, and 10Be and 230Th stratigraphies yielded age ranges of 24-29 Ka for the Mono Lake event, 34-43 Ka for the Laschamp event, 72-86 Ka for the Norwegian-Greenland Sea event and 118-128 Ka for the Blake event. Two reverse polarity samples at the base of core PS2212-3 KAL are interpreted as the termination of the Biwa I event (171-181 Ka). the events exhibit full inversion of inclination in both cores. the data suggest that the transition process of the Earth's magnetic field during such polarity events requires some 1 Ka. Category: geoscientificInformation Source: Supplement to: Nowaczyk, Norbert R; Frederichs, Thomas; Eisenhauer, Anton; Gard, Gunilla (1994): Magnetostratigraphic data from late Quaternary sediments from the Yermak Plateau, Arctic Ocean: evidence for four geomagnetic polarity events within the last 170 Ka of the Brunhes Chron. Geophysical Journal International, 117(2), 453-471, https://doi.org/10.1111/j.1365-246X.1994.tb03944.x Supplemental Information: Not Availble Coverage: EVENT LABEL: (PS19/245) * LATITUDE: 82.023700 * LONGITUDE: 15.672300 * DATE/TIME: 1991-09-29T00:00:00 * ELEVATION: -2531.0 m * Penetration: 8.15 m * Recovery: 8.02 m * LOCATION: Yermak Plateau * CAMPAIGN: ARK-VIII/3 * BASIS: Polarstern * DEVICE: Kasten corer

Contributors: Frank, Martin, Gersonde, Rainer, Rutgers van der Loeff, Michiel M, Bohrmann, Gerhard, Nürnberg, Christine Caroline, Kubik, Peter W, Suter, Martin, Mangini, Augusto

Date: 2000-03-12

South Atlantic in Late Quaternary: Reconstruction of Budget and Currents...Abstract: We present time series of export productivity proxy data including 230Thex-normalized deposition rates (rain rates) of 10Be, dissolution-corrected biogenic Ba, and biogenic opal as well as authigenic U concentrations which are complemented by rain rates of total (detrital) Fe and sea ice indicating diatom abundances from five sediment cores across the Atlantic sector of the Southern Ocean covering the past 150,000 years. The results suggest that 10Be rain rates and authigenic U concentration cannot serve as quantitative paleoproductivity proxies because they have also been influenced by detrital particle fluxes in the case of 10Be and bulk sedimentation rates (sediment focussing) and deep water oxygenation in the case of U. The combined results of the remaining productivity proxies of this study (rain rates of biogenic opal and biogenic Ba in those sections without authigenic U) and other previously published proxy data from the Southern Ocean (231Pa/230Th and nitrogen isotopes) suggest that a combination of sea ice cover, shallow remineralization depth, and stratification of the glacial water column south of the present position of the Antarctic Polar Front and possibly Fe fertilization north of it have been the main controlling factors of export paleoproductivity in the Southern Ocean over the last 150,000 years. An overall glacial increase of export paleoproductivity is not supported by the data, implying that bioproductivity variations in the Southern Ocean are unlikely to have contributed to the major glacial atmospheric CO2 drawdown observed in ice cores. Category: geoscientificInformation Source: Supplement to: Frank, Martin; Gersonde, Rainer; Rutgers van der Loeff, Michiel M; Bohrmann, Gerhard; Nürnberg, Christine Caroline; Kubik, Peter W; Suter, Martin; Mangini, Augusto (2000): Similar glacial and interglacial export bioproductivity in the Atlantic sector of the Southern Ocean: multiproxy evidence and implications for atmospheric CO2. Paleoceanography, 15(6), 642-658, https://doi.org/10.1029/2000PA000497 Supplemental Information: For data of sites PS1772 and 2082 see Frank et al. (1996) dataset: doi:10.1594/PANGAEA.711823 Coverage: EVENT LABEL: (PS16/278) * LATITUDE: -46.771000 * LONGITUDE: 7.612330 * DATE/TIME: 1989-11-06T15:58:00 * ELEVATION: -2519.0 m * Recovery: 3.52 m * LOCATION: Meteor Rise * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS16/278) * LATITUDE: -46.766667 * LONGITUDE: 7.594000 * DATE/TIME: 1989-11-06T17:29:00 * ELEVATION: -2534.0 m * Penetration: 0.4 m * Recovery: 0.33 m * LOCATION: Meteor Rise * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: Giant box corer EVENT LABEL: (PS16/284) * LATITUDE: -48.900000 * LONGITUDE: 6.714660 * DATE/TIME: 1989-11-08T06:24:00 * ELEVATION: -3828.0 m * Recovery: 8.62 m * LOCATION: Meteor Rise * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS16/284) * LATITUDE: -48.896000 * LONGITUDE: 6.729000 * DATE/TIME: 1989-11-08T02:45:00 * ELEVATION: -3832.0 m * Penetration: 0.27 m * Recovery: 0.27 m * LOCATION: Meteor Rise * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: MultiCorer EVENT LABEL: (PS16/311) * LATITUDE: -52.589000 * LONGITUDE: 4.465000 * DATE/TIME: 1989-11-11T10:05:00 * ELEVATION: -3331.0 m * Penetration: 0.34 m * Recovery: 0.34 m * LOCATION: Shona Ridge * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: MultiCorer EVENT LABEL: (PS16/311) * LATITUDE: -52.593000 * LONGITUDE: 4.476000 * DATE/TIME: 1989-11-11T21:40:00 * ELEVATION: -3299.0 m * Recovery: 8.96 m * LOCATION: Shona Ridge * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type)...Paleoenvironmental Reconstructions from Marine Sediments @ AWI ... Abstract: We present time series of export productivity proxy data including 230Thex-normalized deposition rates (rain rates) of 10Be, dissolution-corrected biogenic Ba, and biogenic opal as well as authigenic U concentrations which are complemented by rain rates of total (detrital) Fe and sea ice indicating diatom abundances from five sediment cores across the Atlantic sector of the Southern Ocean covering the past 150,000 years. The results suggest that 10Be rain rates and authigenic U concentration cannot serve as quantitative paleoproductivity proxies because they have also been influenced by detrital particle fluxes in the case of 10Be and bulk sedimentation rates (sediment focussing) and deep water oxygenation in the case of U. The combined results of the remaining productivity proxies of this study (rain rates of biogenic opal and biogenic Ba in those sections without authigenic U) and other previously published proxy data from the Southern Ocean (231Pa/230Th and nitrogen isotopes) suggest that a combination of sea ice cover, shallow remineralization depth, and stratification of the glacial water column south of the present position of the Antarctic Polar Front and possibly Fe fertilization north of it have been the main controlling factors of export paleoproductivity in the Southern Ocean over the last 150,000 years. An overall glacial increase of export paleoproductivity is not supported by the data, implying that bioproductivity variations in the Southern Ocean are unlikely to have contributed to the major glacial atmospheric CO2 drawdown observed in ice cores. Category: geoscientificInformation Source: Supplement to: Frank, Martin; Gersonde, Rainer; Rutgers van der Loeff, Michiel M; Bohrmann, Gerhard; Nürnberg, Christine Caroline; Kubik, Peter W; Suter, Martin; Mangini, Augusto (2000): Similar glacial and interglacial export bioproductivity in the Atlantic sector of the Southern Ocean: multiproxy evidence and implications for atmospheric CO2. Paleoceanography, 15(6), 642-658, https://doi.org/10.1029/2000PA000497 Supplemental Information: For data of sites PS1772 and 2082 see Frank et al. (1996) dataset: doi:10.1594/PANGAEA.711823 Coverage: EVENT LABEL: (PS16/278) * LATITUDE: -46.771000 * LONGITUDE: 7.612330 * DATE/TIME: 1989-11-06T15:58:00 * ELEVATION: -2519.0 m * Recovery: 3.52 m * LOCATION: Meteor Rise * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS16/278) * LATITUDE: -46.766667 * LONGITUDE: 7.594000 * DATE/TIME: 1989-11-06T17:29:00 * ELEVATION: -2534.0 m * Penetration: 0.4 m * Recovery: 0.33 m * LOCATION: Meteor Rise * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: Giant box corer EVENT LABEL: (PS16/284) * LATITUDE: -48.900000 * LONGITUDE: 6.714660 * DATE/TIME: 1989-11-08T06:24:00 * ELEVATION: -3828.0 m * Recovery: 8.62 m * LOCATION: Meteor Rise * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS16/284) * LATITUDE: -48.896000 * LONGITUDE: 6.729000 * DATE/TIME: 1989-11-08T02:45:00 * ELEVATION: -3832.0 m * Penetration: 0.27 m * Recovery: 0.27 m * LOCATION: Meteor Rise * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: MultiCorer EVENT LABEL: (PS16/311) * LATITUDE: -52.589000 * LONGITUDE: 4.465000 * DATE/TIME: 1989-11-11T10:05:00 * ELEVATION: -3331.0 m * Penetration: 0.34 m * Recovery: 0.34 m * LOCATION: Shona Ridge * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: MultiCorer EVENT LABEL: (PS16/311) * LATITUDE: -52.593000 * LONGITUDE: 4.476000 * DATE/TIME: 1989-11-11T21:40:00 * ELEVATION: -3299.0 m * Recovery: 8.96 m * LOCATION: Shona Ridge * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type)

Contributors: Esper, Oliver, Zonneveld, Karin A F, Höll, Christine, Karwath, Britta, Schneider, Ralph R, Vink, Annemiek, Weise-Ihlo, Ilka, Willems, Helmut

Date: 2000-03-09

Reconstruction of Recent and Late Quaternary oceanographic conditions in the Eastern South Atlantic Ocean based on calcareous- and organic-walled dinoflagellate cysts...South Atlantic in Late Quaternary: Reconstruction of Budget and Currents...Abstract: Despite the increasing interest in the South Atlantic Ocean as a key area of the heat exchange between the southern and the northern hemisphere, information about its palaeoceanographic conditions during transitions from glacial to interglacial stages, the so-called Terminations, are not well understood. Herein we attempt to increase this information by studying the calcareous dinoflagellate cysts and the shells of Thoracosphaera heimii (calcareous cysts) of five Late Quaternary South Atlantic Ocean cores. Extremely high accumulation rates of calcareous cysts at the Terminations might be due to a combined effect of increased cyst production and better preservation as result of calm, oligotrophic conditions in the upper water layers. Low relative abundance of Sphaerodinella albatrosiana compared with Sphaerodinella tuberosa in the Cape Basin may be the result of the relatively colder environmental conditions in this region compared with the equatorial Atlantic Ocean with high relative abundance of S. albatrosiana. Furthermore, the predominance of S. tuberosa during glacials and interglacials at the observed site of the western Atlantic Ocean reflects decreased salinity in the upper water layer. Category: geoscientificInformation Source: Supplement to: Esper, Oliver; Zonneveld, Karin A F; Höll, Christine; Karwath, Britta; Schneider, Ralph R; Vink, Annemiek; Weise-Ihlo, Ilka; Willems, Helmut (2000): Reconstruction of palaeoceanographic conditions in the South Atlantic Ocean at the last two Terminations based on calcareous dinoflagllate cysts. International Journal of Earth Sciences, 88(4), 680-693, https://doi.org/10.1007/s005310050297 Supplemental Information: For data of sediment core GeoB1105-4 see Höll et al. (1998) dataset: doi:10.1594/PANGAEA.55381, sediment core GeoB2204-2 see Höll et al. (1999) dataset: doi:10.1594/PANGAEA.55382 Coverage: EVENT LABEL: * LATITUDE: -1.665000 * LONGITUDE: -12.428330 * DATE/TIME: 1989-02-25T00:00:00 * ELEVATION: -3225.0 m * Penetration: 17 m * Recovery: 15.22 m * LOCATION: Equatorial Atlantic * CAMPAIGN: M9/4 * BASIS: Meteor (1986) * DEVICE: Gravity corer (Kiel type) EVENT LABEL: * LATITUDE: -3.815000 * LONGITUDE: -14.896660 * DATE/TIME: 1989-03-05T00:00:00 * ELEVATION: -3984.0 m * Penetration: 16 m * Recovery: 15.3 m * LOCATION: Brazil Basin * CAMPAIGN: M9/4 * BASIS: Meteor (1986) * DEVICE: Gravity corer (Kiel type) EVENT LABEL: * LATITUDE: -24.690000 * LONGITUDE: 7.240000 * DATE/TIME: 1990-03-22T00:00:00 * ELEVATION: -3210.0 m * Recovery: 5.08 m * LOCATION: Cape Basin * CAMPAIGN: M12/1 * BASIS: Meteor (1986) * DEVICE: Gravity corer (Kiel type) EVENT LABEL: * LATITUDE: -8.528333 * LONGITUDE: -34.021667 * DATE/TIME: 1993-03-22T00:00:00 * ELEVATION: -2072.0 m * Recovery: 8.97 m * LOCATION: Brazil Basin * CAMPAIGN: M23/3 * BASIS: Meteor (1986) * DEVICE: Gravity corer (Kiel type) EVENT LABEL: * LATITUDE: -35.125000 * LONGITUDE: 17.543333 * DATE/TIME: 1996-01-04T00:00:00 * ELEVATION: -2840.0 m * Recovery: 11.3 m * LOCATION: Southern Cape Basin * CAMPAIGN: M34/1 * BASIS: Meteor (1986) * DEVICE: Gravity corer (Kiel type) ... Abstract: Despite the increasing interest in the South Atlantic Ocean as a key area of the heat exchange between the southern and the northern hemisphere, information about its palaeoceanographic conditions during transitions from glacial to interglacial stages, the so-called Terminations, are not well understood. Herein we attempt to increase this information by studying the calcareous dinoflagellate cysts and the shells of Thoracosphaera heimii (calcareous cysts) of five Late Quaternary South Atlantic Ocean cores. Extremely high accumulation rates of calcareous cysts at the Terminations might be due to a combined effect of increased cyst production and better preservation as result of calm, oligotrophic conditions in the upper water layers. Low relative abundance of Sphaerodinella albatrosiana compared with Sphaerodinella tuberosa in the Cape Basin may be the result of the relatively colder environmental conditions in this region compared with the equatorial Atlantic Ocean with high relative abundance of S. albatrosiana. Furthermore, the predominance of S. tuberosa during glacials and interglacials at the observed site of the western Atlantic Ocean reflects decreased salinity in the upper water layer. Category: geoscientificInformation Source: Supplement to: Esper, Oliver; Zonneveld, Karin A F; Höll, Christine; Karwath, Britta; Schneider, Ralph R; Vink, Annemiek; Weise-Ihlo, Ilka; Willems, Helmut (2000): Reconstruction of palaeoceanographic conditions in the South Atlantic Ocean at the last two Terminations based on calcareous dinoflagllate cysts. International Journal of Earth Sciences, 88(4), 680-693, https://doi.org/10.1007/s005310050297 Supplemental Information: For data of sediment core GeoB1105-4 see Höll et al. (1998) dataset: doi:10.1594/PANGAEA.55381, sediment core GeoB2204-2 see Höll et al. (1999) dataset: doi:10.1594/PANGAEA.55382 Coverage: EVENT LABEL: * LATITUDE: -1.665000 * LONGITUDE: -12.428330 * DATE/TIME: 1989-02-25T00:00:00 * ELEVATION: -3225.0 m * Penetration: 17 m * Recovery: 15.22 m * LOCATION: Equatorial Atlantic * CAMPAIGN: M9/4 * BASIS: Meteor (1986) * DEVICE: Gravity corer (Kiel type) EVENT LABEL: * LATITUDE: -3.815000 * LONGITUDE: -14.896660 * DATE/TIME: 1989-03-05T00:00:00 * ELEVATION: -3984.0 m * Penetration: 16 m * Recovery: 15.3 m * LOCATION: Brazil Basin * CAMPAIGN: M9/4 * BASIS: Meteor (1986) * DEVICE: Gravity corer (Kiel type) EVENT LABEL: * LATITUDE: -24.690000 * LONGITUDE: 7.240000 * DATE/TIME: 1990-03-22T00:00:00 * ELEVATION: -3210.0 m * Recovery: 5.08 m * LOCATION: Cape Basin * CAMPAIGN: M12/1 * BASIS: Meteor (1986) * DEVICE: Gravity corer (Kiel type) EVENT LABEL: * LATITUDE: -8.528333 * LONGITUDE: -34.021667 * DATE/TIME: 1993-03-22T00:00:00 * ELEVATION: -2072.0 m * Recovery: 8.97 m * LOCATION: Brazil Basin * CAMPAIGN: M23/3 * BASIS: Meteor (1986) * DEVICE: Gravity corer (Kiel type) EVENT LABEL: * LATITUDE: -35.125000 * LONGITUDE: 17.543333 * DATE/TIME: 1996-01-04T00:00:00 * ELEVATION: -2840.0 m * Recovery: 11.3 m * LOCATION: Southern Cape Basin * CAMPAIGN: M34/1 * BASIS: Meteor (1986) * DEVICE: Gravity corer (Kiel type)

Contributors: Diekmann, Bernhard, Fütterer, Dieter K, Grobe, Hannes, Hillenbrand, Claus-Dieter, Kuhn, Gerhard, Michels, Klaus, Petschick, Rainer, Pirrung, Michael

Date: 2003-01-21

Terrigenous sediment supply in the Scotia Sea (Southern Ocean): response to Late Quaternary ice dynamics in Patagonia and on the Antarctic Peninsula...Abstract: Terrigenous sediment parameters in modern sea-bottom samples and sediment cores of the South Atlantic are used to infer variations in detrital sources and modes of terrigenous sediment supply in response to environmental changes through the late Quaternary climate cycles. Massaccumulation rates of terrigenous sediment and fluxes of ice-rafted detritus are discussed in terms of temporal variations in detrital sediment input from land to sea. Grain-size parameters ofterrigenous mud document the intensity of bottom-water circulation, whereas clay-mineral assemblages constrain the sources and marine transport routes of suspended fine-grained particulates, controlled by the modes of sediment input and patterns of ocean circulation. The results suggest low-frequency East Antarctic ice dynamics with dominant 100-kyr cycles and high rates of Antarctic Bottom Water formation and iceberg discharge during interglacial times. In contrast, the more subpolar ice masses of the Antarctic Peninsula also respond to short-term climate variability with maximum iceberg discharges during glacial terminations related to the rapid disintegration of advanced ice masses. In the northern Scotia Sea, increased sediment supply from southern South America points to extended ice masses in Patagonia during glacial times. In the southeastern South Atlantic, changes in regional ocean circulation are linked to global thermohaline ocean circulation and are in phase with northern-hemispheric processes of ice build-up and associated formation of North Atlantic Deep Water, which decreased during glacial times and permitted a wider extension of southern-source water masses in the study area. Category: geoscientificInformation Source: Supplement to: Diekmann, Bernhard; Fütterer, Dieter K; Grobe, Hannes; Hillenbrand, Claus-Dieter; Kuhn, Gerhard; Michels, Klaus; Petschick, Rainer; Pirrung, Michael (2004): Terrigenous sediment supply in the polar to temperate South Atlantic: land-ocean links of environmental changes during the late Quaternary. In: Wefer, G; Mulitza, S & Ratmeyer, V (eds.), The South Atlantic in the Late Quaternary: Reconstruction of Material Budget and Current Systems. Springer-Verlag, Berlin, Heidelberg, New York, 375-399, hdl:10013/epic.15597.d001 Supplemental Information: Not Availble Coverage: EVENT LABEL: (PS12/248) * LATITUDE: -62.849500 * LONGITUDE: -43.335500 * DATE/TIME: 1987-12-26T13:05:00 * ELEVATION: -3461.0 m * Penetration: 10.7 m * Recovery: 8.51 m * LOCATION: South Orkney * CAMPAIGN: ANT-VI/3 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS16/271) * LATITUDE: -45.623330 * LONGITUDE: 9.600000 * DATE/TIME: 1989-11-05T20:35:00 * ELEVATION: -4555.0 m * Penetration: 10 m * Recovery: 8.44 m * LOCATION: Agulhas Basin * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS16/278) * LATITUDE: -46.771000 * LONGITUDE: 7.612330 * DATE/TIME: 1989-11-06T15:58:00 * ELEVATION: -2519.0 m * Recovery: 3.52 m * LOCATION: Meteor Rise * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS16/284) * LATITUDE: -48.900000 * LONGITUDE: 6.714660 * DATE/TIME: 1989-11-08T06:24:00 * ELEVATION: -3828.0 m * Recovery: 8.62 m * LOCATION: Meteor Rise * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS16/311) * LATITUDE: -52.593000 * LONGITUDE: 4.476000 * DATE/TIME: 1989-11-11T21:40:00 * ELEVATION: -3299.0 m * Recovery: 8.96 m * LOCATION: Shona Ridge * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS16/321) * LATITUDE: -55.458330 * LONGITUDE: 1.163330 * DATE/TIME: 1989-11-13T16:25:00 * ELEVATION: -4137.0 m * Recovery: 13.3 m * LOCATION: Atlantic Ridge * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS16/345) * LATITUDE: -49.013330 * LONGITUDE: -12.700000 * DATE/TIME: 1989-11-18T15:44:00 * ELEVATION: -3407.0 m * Recovery: 12.71 m * LOCATION: Atlantic Ridge * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS16/534) * LATITUDE: -67.065330 * LONGITUDE: 37.480500 * DATE/TIME: 1990-04-03T03:19:00 * ELEVATION: -4027.0 m * Penetration: 18 m * Recovery: 15.82 m * LOCATION: Lazarev Sea * CAMPAIGN: ANT-VIII/6 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS18/238) * LATITUDE: -43.220160 * LONGITUDE: 11.738330 * DATE/TIME: 1991-04-03T16:03:00 * ELEVATION: -4610.0 m * Penetration: 15 m * Recovery: 13.91 m * LOCATION: Agulhas Basin * CAMPAIGN: ANT-IX/4 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS18/238) * LATITUDE: -43.218167 * LONGITUDE: 11.759000 * DATE/TIME: 1991-04-03T18:40:00 * ELEVATION: -4611.0 m * Recovery: 0.26 m * LOCATION: Agulhas Basin * CAMPAIGN: ANT-IX/4 * BASIS: Polarstern * DEVICE: MultiCorer EVENT LABEL: (PS22/773) * LATITUDE: -55.968660 * LONGITUDE: -22.224830 * DATE/TIME: 1992-08-25T21:22:00 * ELEVATION: -4418.0 m * Recovery: 11.31 m * LOCATION: South Atlantic Ocean * CAMPAIGN: ANT-X/5 * BASIS: Polarstern * DEVICE: Piston corer (BGR type) EVENT LABEL: (PS22/817) * LATITUDE: -59.788330 * LONGITUDE: -42.683330 * DATE/TIME: 1992-09-13T18:24:00 * ELEVATION: -4323.0 m * Penetration: 18 m * Recovery: 11.54 m * LOCATION: Scotia Sea * CAMPAIGN: ANT-X/5 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS28/293) * LATITUDE: -41.275000 * LONGITUDE: -14.490000 * DATE/TIME: 1993-12-22T11:30:00 * ELEVATION: -3134.0 m * Penetration: 10 m * Recovery: 9.05 m * LOCATION: South Atlantic * CAMPAIGN: ANT-XI/2 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS28/304) * LATITUDE: -44.153330 * LONGITUDE: -14.228330 * DATE/TIME: 1993-12-24T06:58:00 * ELEVATION: -3783.0 m * Recovery: 11.61 m * LOCATION: South Atlantic * CAMPAIGN: ANT-XI/2 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS28/378) * LATITUDE: -53.545000 * LONGITUDE: -45.291660 * DATE/TIME: 1994-01-05T13:45:00 * ELEVATION: -3467.0 m * Penetration: 17 m * Recovery: 13.07 m * LOCATION: Scotia Sea, southwest Atlantic * CAMPAIGN: ANT-XI/2 * BASIS: Polarstern * DEVICE: Piston corer (BGR type) EVENT LABEL: (PS30/048) * LATITUDE: -46.141660 * LONGITUDE: 35.898330 * DATE/TIME: 1994-04-05T10:38:00 * ELEVATION: -3035.0 m * Penetration: 15 m * Recovery: 10.92 m * LOCATION: South Atlantic * CAMPAIGN: ANT-XI/4 * BASIS: Polarstern * DEVICE: Piston corer (BGR type)...Paleoenvironmental Reconstructions from Marine Sediments @ AWI ... Abstract: Terrigenous sediment parameters in modern sea-bottom samples and sediment cores of the South Atlantic are used to infer variations in detrital sources and modes of terrigenous sediment supply in response to environmental changes through the late Quaternary climate cycles. Massaccumulation rates of terrigenous sediment and fluxes of ice-rafted detritus are discussed in terms of temporal variations in detrital sediment input from land to sea. Grain-size parameters ofterrigenous mud document the intensity of bottom-water circulation, whereas clay-mineral assemblages constrain the sources and marine transport routes of suspended fine-grained particulates, controlled by the modes of sediment input and patterns of ocean circulation. The results suggest low-frequency East Antarctic ice dynamics with dominant 100-kyr cycles and high rates of Antarctic Bottom Water formation and iceberg discharge during interglacial times. In contrast, the more subpolar ice masses of the Antarctic Peninsula also respond to short-term climate variability with maximum iceberg discharges during glacial terminations related to the rapid disintegration of advanced ice masses. In the northern Scotia Sea, increased sediment supply from southern South America points to extended ice masses in Patagonia during glacial times. In the southeastern South Atlantic, changes in regional ocean circulation are linked to global thermohaline ocean circulation and are in phase with northern-hemispheric processes of ice build-up and associated formation of North Atlantic Deep Water, which decreased during glacial times and permitted a wider extension of southern-source water masses in the study area. Category: geoscientificInformation Source: Supplement to: Diekmann, Bernhard; Fütterer, Dieter K; Grobe, Hannes; Hillenbrand, Claus-Dieter; Kuhn, Gerhard; Michels, Klaus; Petschick, Rainer; Pirrung, Michael (2004): Terrigenous sediment supply in the polar to temperate South Atlantic: land-ocean links of environmental changes during the late Quaternary. In: Wefer, G; Mulitza, S & Ratmeyer, V (eds.), The South Atlantic in the Late Quaternary: Reconstruction of Material Budget and Current Systems. Springer-Verlag, Berlin, Heidelberg, New York, 375-399, hdl:10013/epic.15597.d001 Supplemental Information: Not Availble Coverage: EVENT LABEL: (PS12/248) * LATITUDE: -62.849500 * LONGITUDE: -43.335500 * DATE/TIME: 1987-12-26T13:05:00 * ELEVATION: -3461.0 m * Penetration: 10.7 m * Recovery: 8.51 m * LOCATION: South Orkney * CAMPAIGN: ANT-VI/3 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS16/271) * LATITUDE: -45.623330 * LONGITUDE: 9.600000 * DATE/TIME: 1989-11-05T20:35:00 * ELEVATION: -4555.0 m * Penetration: 10 m * Recovery: 8.44 m * LOCATION: Agulhas Basin * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS16/278) * LATITUDE: -46.771000 * LONGITUDE: 7.612330 * DATE/TIME: 1989-11-06T15:58:00 * ELEVATION: -2519.0 m * Recovery: 3.52 m * LOCATION: Meteor Rise * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS16/284) * LATITUDE: -48.900000 * LONGITUDE: 6.714660 * DATE/TIME: 1989-11-08T06:24:00 * ELEVATION: -3828.0 m * Recovery: 8.62 m * LOCATION: Meteor Rise * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS16/311) * LATITUDE: -52.593000 * LONGITUDE: 4.476000 * DATE/TIME: 1989-11-11T21:40:00 * ELEVATION: -3299.0 m * Recovery: 8.96 m * LOCATION: Shona Ridge * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS16/321) * LATITUDE: -55.458330 * LONGITUDE: 1.163330 * DATE/TIME: 1989-11-13T16:25:00 * ELEVATION: -4137.0 m * Recovery: 13.3 m * LOCATION: Atlantic Ridge * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS16/345) * LATITUDE: -49.013330 * LONGITUDE: -12.700000 * DATE/TIME: 1989-11-18T15:44:00 * ELEVATION: -3407.0 m * Recovery: 12.71 m * LOCATION: Atlantic Ridge * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS16/534) * LATITUDE: -67.065330 * LONGITUDE: 37.480500 * DATE/TIME: 1990-04-03T03:19:00 * ELEVATION: -4027.0 m * Penetration: 18 m * Recovery: 15.82 m * LOCATION: Lazarev Sea * CAMPAIGN: ANT-VIII/6 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS18/238) * LATITUDE: -43.220160 * LONGITUDE: 11.738330 * DATE/TIME: 1991-04-03T16:03:00 * ELEVATION: -4610.0 m * Penetration: 15 m * Recovery: 13.91 m * LOCATION: Agulhas Basin * CAMPAIGN: ANT-IX/4 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS18/238) * LATITUDE: -43.218167 * LONGITUDE: 11.759000 * DATE/TIME: 1991-04-03T18:40:00 * ELEVATION: -4611.0 m * Recovery: 0.26 m * LOCATION: Agulhas Basin * CAMPAIGN: ANT-IX/4 * BASIS: Polarstern * DEVICE: MultiCorer EVENT LABEL: (PS22/773) * LATITUDE: -55.968660 * LONGITUDE: -22.224830 * DATE/TIME: 1992-08-25T21:22:00 * ELEVATION: -4418.0 m * Recovery: 11.31 m * LOCATION: South Atlantic Ocean * CAMPAIGN: ANT-X/5 * BASIS: Polarstern * DEVICE: Piston corer (BGR type) EVENT LABEL: (PS22/817) * LATITUDE: -59.788330 * LONGITUDE: -42.683330 * DATE/TIME: 1992-09-13T18:24:00 * ELEVATION: -4323.0 m * Penetration: 18 m * Recovery: 11.54 m * LOCATION: Scotia Sea * CAMPAIGN: ANT-X/5 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS28/293) * LATITUDE: -41.275000 * LONGITUDE: -14.490000 * DATE/TIME: 1993-12-22T11:30:00 * ELEVATION: -3134.0 m * Penetration: 10 m * Recovery: 9.05 m * LOCATION: South Atlantic * CAMPAIGN: ANT-XI/2 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS28/304) * LATITUDE: -44.153330 * LONGITUDE: -14.228330 * DATE/TIME: 1993-12-24T06:58:00 * ELEVATION: -3783.0 m * Recovery: 11.61 m * LOCATION: South Atlantic * CAMPAIGN: ANT-XI/2 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS28/378) * LATITUDE: -53.545000 * LONGITUDE: -45.291660 * DATE/TIME: 1994-01-05T13:45:00 * ELEVATION: -3467.0 m * Penetration: 17 m * Recovery: 13.07 m * LOCATION: Scotia Sea, southwest Atlantic * CAMPAIGN: ANT-XI/2 * BASIS: Polarstern * DEVICE: Piston corer (BGR type) EVENT LABEL: (PS30/048) * LATITUDE: -46.141660 * LONGITUDE: 35.898330 * DATE/TIME: 1994-04-05T10:38:00 * ELEVATION: -3035.0 m * Penetration: 15 m * Recovery: 10.92 m * LOCATION: South Atlantic * CAMPAIGN: ANT-XI/4 * BASIS: Polarstern * DEVICE: Piston corer (BGR type)

Contributors: Frank, Martin, Gersonde, Rainer, Rutgers van der Loeff, Michiel M, Kuhn, Gerhard, Mangini, Augusto

Date: 1996-01-27

Abstract: High-resolution records of the natural radionuclide 230Th were measured in sediments from the eastern Atlantic sector of the Antarctic circumpolar current to obtain a detailed reconstruction of the sedimentation history of this key area for global climate change during the late Quaternary. High-resolution dating rests on the assumption that the 230Thex flux to the sediments is constant. Short periods of drastically increased sediment accumulation rates (up to a factor of 8) were determined in the sediments of the Antarctic zone during the climate optima at the beginning of the Holocene and the isotope stage 5e. By comparing expected and measured accumulation rate of 230Thex, lateral sediment redistribution was quantified and vertical particle rain rates originating from the surface water above were calculated. We show that lateral contributions locally were up to 6.5 times higher than the vertical particle rain rates. At other locations only 15% of the expected vertical particle rain rate were deposited. Category: geoscientificInformation Source: Supplement to: Frank, Martin; Gersonde, Rainer; Rutgers van der Loeff, Michiel M; Kuhn, Gerhard; Mangini, Augusto (1996): Late Quaternary sediment dating and quantification of lateral sediment redistribution applying 230Th-excess, a study of the eastern Atlantic sector of the Southern Ocean. Geologische Rundschau, 85(3), 554-566, https://doi.org/10.1007/BF02369010 Supplemental Information: Not Availble Coverage: EVENT LABEL: (PS16/278) * LATITUDE: -46.771000 * LONGITUDE: 7.612330 * DATE/TIME: 1989-11-06T15:58:00 * ELEVATION: -2519.0 m * Recovery: 3.52 m * LOCATION: Meteor Rise * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS16/278) * LATITUDE: -46.766667 * LONGITUDE: 7.594000 * DATE/TIME: 1989-11-06T17:29:00 * ELEVATION: -2534.0 m * Penetration: 0.4 m * Recovery: 0.33 m * LOCATION: Meteor Rise * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: Giant box corer EVENT LABEL: (PS16/284) * LATITUDE: -48.900000 * LONGITUDE: 6.714660 * DATE/TIME: 1989-11-08T06:24:00 * ELEVATION: -3828.0 m * Recovery: 8.62 m * LOCATION: Meteor Rise * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS16/284) * LATITUDE: -48.896000 * LONGITUDE: 6.729000 * DATE/TIME: 1989-11-08T02:45:00 * ELEVATION: -3832.0 m * Penetration: 0.27 m * Recovery: 0.27 m * LOCATION: Meteor Rise * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: MultiCorer EVENT LABEL: (PS16/311) * LATITUDE: -52.589000 * LONGITUDE: 4.465000 * DATE/TIME: 1989-11-11T10:05:00 * ELEVATION: -3331.0 m * Penetration: 0.34 m * Recovery: 0.34 m * LOCATION: Shona Ridge * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: MultiCorer EVENT LABEL: (PS16/311) * LATITUDE: -52.593000 * LONGITUDE: 4.476000 * DATE/TIME: 1989-11-11T21:40:00 * ELEVATION: -3299.0 m * Recovery: 8.96 m * LOCATION: Shona Ridge * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS16/321) * LATITUDE: -55.458333 * LONGITUDE: 1.166667 * DATE/TIME: 1989-11-13T13:01:00 * ELEVATION: -4140.0 m * Penetration: 0.3 m * Recovery: 0.3 m * LOCATION: Atlantic Ridge * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: MultiCorer EVENT LABEL: (PS16/321) * LATITUDE: -55.458330 * LONGITUDE: 1.163330 * DATE/TIME: 1989-11-13T16:25:00 * ELEVATION: -4137.0 m * Recovery: 13.3 m * LOCATION: Atlantic Ridge * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS18/238) * LATITUDE: -43.220160 * LONGITUDE: 11.738330 * DATE/TIME: 1991-04-03T16:03:00 * ELEVATION: -4610.0 m * Penetration: 15 m * Recovery: 13.91 m * LOCATION: Agulhas Basin * CAMPAIGN: ANT-IX/4 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS18/238) * LATITUDE: -43.218167 * LONGITUDE: 11.759000 * DATE/TIME: 1991-04-03T18:40:00 * ELEVATION: -4611.0 m * Recovery: 0.26 m * LOCATION: Agulhas Basin * CAMPAIGN: ANT-IX/4 * BASIS: Polarstern * DEVICE: MultiCorer...Paleoenvironmental Reconstructions from Marine Sediments @ AWI ... Abstract: High-resolution records of the natural radionuclide 230Th were measured in sediments from the eastern Atlantic sector of the Antarctic circumpolar current to obtain a detailed reconstruction of the sedimentation history of this key area for global climate change during the late Quaternary. High-resolution dating rests on the assumption that the 230Thex flux to the sediments is constant. Short periods of drastically increased sediment accumulation rates (up to a factor of 8) were determined in the sediments of the Antarctic zone during the climate optima at the beginning of the Holocene and the isotope stage 5e. By comparing expected and measured accumulation rate of 230Thex, lateral sediment redistribution was quantified and vertical particle rain rates originating from the surface water above were calculated. We show that lateral contributions locally were up to 6.5 times higher than the vertical particle rain rates. At other locations only 15% of the expected vertical particle rain rate were deposited. Category: geoscientificInformation Source: Supplement to: Frank, Martin; Gersonde, Rainer; Rutgers van der Loeff, Michiel M; Kuhn, Gerhard; Mangini, Augusto (1996): Late Quaternary sediment dating and quantification of lateral sediment redistribution applying 230Th-excess, a study of the eastern Atlantic sector of the Southern Ocean. Geologische Rundschau, 85(3), 554-566, https://doi.org/10.1007/BF02369010 Supplemental Information: Not Availble Coverage: EVENT LABEL: (PS16/278) * LATITUDE: -46.771000 * LONGITUDE: 7.612330 * DATE/TIME: 1989-11-06T15:58:00 * ELEVATION: -2519.0 m * Recovery: 3.52 m * LOCATION: Meteor Rise * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS16/278) * LATITUDE: -46.766667 * LONGITUDE: 7.594000 * DATE/TIME: 1989-11-06T17:29:00 * ELEVATION: -2534.0 m * Penetration: 0.4 m * Recovery: 0.33 m * LOCATION: Meteor Rise * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: Giant box corer EVENT LABEL: (PS16/284) * LATITUDE: -48.900000 * LONGITUDE: 6.714660 * DATE/TIME: 1989-11-08T06:24:00 * ELEVATION: -3828.0 m * Recovery: 8.62 m * LOCATION: Meteor Rise * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS16/284) * LATITUDE: -48.896000 * LONGITUDE: 6.729000 * DATE/TIME: 1989-11-08T02:45:00 * ELEVATION: -3832.0 m * Penetration: 0.27 m * Recovery: 0.27 m * LOCATION: Meteor Rise * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: MultiCorer EVENT LABEL: (PS16/311) * LATITUDE: -52.589000 * LONGITUDE: 4.465000 * DATE/TIME: 1989-11-11T10:05:00 * ELEVATION: -3331.0 m * Penetration: 0.34 m * Recovery: 0.34 m * LOCATION: Shona Ridge * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: MultiCorer EVENT LABEL: (PS16/311) * LATITUDE: -52.593000 * LONGITUDE: 4.476000 * DATE/TIME: 1989-11-11T21:40:00 * ELEVATION: -3299.0 m * Recovery: 8.96 m * LOCATION: Shona Ridge * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS16/321) * LATITUDE: -55.458333 * LONGITUDE: 1.166667 * DATE/TIME: 1989-11-13T13:01:00 * ELEVATION: -4140.0 m * Penetration: 0.3 m * Recovery: 0.3 m * LOCATION: Atlantic Ridge * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: MultiCorer EVENT LABEL: (PS16/321) * LATITUDE: -55.458330 * LONGITUDE: 1.163330 * DATE/TIME: 1989-11-13T16:25:00 * ELEVATION: -4137.0 m * Recovery: 13.3 m * LOCATION: Atlantic Ridge * CAMPAIGN: ANT-VIII/3 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS18/238) * LATITUDE: -43.220160 * LONGITUDE: 11.738330 * DATE/TIME: 1991-04-03T16:03:00 * ELEVATION: -4610.0 m * Penetration: 15 m * Recovery: 13.91 m * LOCATION: Agulhas Basin * CAMPAIGN: ANT-IX/4 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type) EVENT LABEL: (PS18/238) * LATITUDE: -43.218167 * LONGITUDE: 11.759000 * DATE/TIME: 1991-04-03T18:40:00 * ELEVATION: -4611.0 m * Recovery: 0.26 m * LOCATION: Agulhas Basin * CAMPAIGN: ANT-IX/4 * BASIS: Polarstern * DEVICE: MultiCorer

Contributors: Jones, Richard LI, Whatley, Robin C, Cronin, Thomas M, Dowsett, Harry J

Date: 1999-08-14

Abstract: The distribution of Ostracoda in three long cores from the deep eastern Arctic Ocean was studied to determine the palaeoceanographical history of the Eurasian Basin during the late Quaternary. The samples for this study were obtained from the Lomonosov Ridge, Morris Jesup Rise and Yermak Plateau during the Arctic 91 expedition. Ostracoda previously studied in coretops at the same sites as the present study have shown that individual species have a strong association with different water masses and bathymetry. Throughout the late Quaternary, cores exhibit ostracod-rich layers separated by barren intervals. On the basis of biostratigraphical, isotopic and palaeomagnetic data the fossiliferous levels are interpreted as representing interglacial stages. The twenty most significant species were selected for subsequent quantitative investigation using Cluster and Factor analyses, in order to determine similarity and variance between the assemblages. An additional statistical method employing Modern Analogues and the Squared Chord Distance dissimilarity coefficient was utilised to compare the present late Quaternary fossil samples with a modern Arctic database. The results reveal a major faunal division within the Arctic Ocean Deep Water (AODW). Highly abundant and diverse assemblages within the cores were found to group and have good analogues with the Recent bathyal depth (1000-2500 m) upper AODW assemblages. Conversely, assemblages with low abundance and diversity correlate well with abyssal depth (>3000 m) lower AODW assemblages. The palaeoceanographical history is complicated by the influence of adjacent water masses such as Canada Basin Deep Water (CBDW), Greenland Sea Deep Water (GSDW) and most importantly, Arctic Intermediate Water (AIW), which all had an influence on the ostracod assemblages during the late Quaternary. An enhanced flow of warm saline AIW into the Eurasian Basin results in species-rich upper AODW assemblages having good analogues down to 2750 m in the water column. In contrast, lower AODW assemblages influenced by cold well-oxygenated GSDW give analogues at depths as shallow as 1000 m. The faunal changes are the consequence of rapid climatic fluctuations in the eastern Arctic Ocean during the late Quaternary that are intrinsically linked to palaeoceanographical alternations in warm and cold current inflow from adjacent basins. Category: geoscientificInformation Source: Supplement to: Jones, Richard LI; Whatley, Robin C; Cronin, Thomas M; Dowsett, Harry J (1999): Reconstructing late Quaternary deep-water masses in the eastern Arctic Ocean using benthonic ostracoda. Marine Micropaleontology, 37(3-4), 251-272, https://doi.org/10.1016/S0377-8398(99)00022-5 Supplemental Information: Not Availble Coverage: EVENT LABEL: (PS19/186) * LATITUDE: 87.529300 * LONGITUDE: 144.166200 * DATE/TIME: 1991-09-02T00:00:00 * ELEVATION: -1073.0 m * Penetration: 8.4 m * Recovery: 8.1 m * LOCATION: Lomonosov Ridge, Arctic Ocean * CAMPAIGN: ARK-VIII/3 * BASIS: Polarstern * DEVICE: Kasten corer EVENT LABEL: (PS19/218) * LATITUDE: 85.327700 * LONGITUDE: -14.022000 * DATE/TIME: 1991-09-16T00:00:00 * ELEVATION: -1073.0 m * Penetration: 7.7 m * Recovery: 7.25 m * LOCATION: Morris Jesup Rise * CAMPAIGN: ARK-VIII/3 * BASIS: Polarstern * DEVICE: Kasten corer EVENT LABEL: (PS19/245) * LATITUDE: 82.023700 * LONGITUDE: 15.672300 * DATE/TIME: 1991-09-29T00:00:00 * ELEVATION: -2531.0 m * Penetration: 8.15 m * Recovery: 8.02 m * LOCATION: Yermak Plateau * CAMPAIGN: ARK-VIII/3 * BASIS: Polarstern * DEVICE: Kasten corer ... Abstract: The distribution of Ostracoda in three long cores from the deep eastern Arctic Ocean was studied to determine the palaeoceanographical history of the Eurasian Basin during the late Quaternary. The samples for this study were obtained from the Lomonosov Ridge, Morris Jesup Rise and Yermak Plateau during the Arctic 91 expedition. Ostracoda previously studied in coretops at the same sites as the present study have shown that individual species have a strong association with different water masses and bathymetry. Throughout the late Quaternary, cores exhibit ostracod-rich layers separated by barren intervals. On the basis of biostratigraphical, isotopic and palaeomagnetic data the fossiliferous levels are interpreted as representing interglacial stages. The twenty most significant species were selected for subsequent quantitative investigation using Cluster and Factor analyses, in order to determine similarity and variance between the assemblages. An additional statistical method employing Modern Analogues and the Squared Chord Distance dissimilarity coefficient was utilised to compare the present late Quaternary fossil samples with a modern Arctic database. The results reveal a major faunal division within the Arctic Ocean Deep Water (AODW). Highly abundant and diverse assemblages within the cores were found to group and have good analogues with the Recent bathyal depth (1000-2500 m) upper AODW assemblages. Conversely, assemblages with low abundance and diversity correlate well with abyssal depth (>3000 m) lower AODW assemblages. The palaeoceanographical history is complicated by the influence of adjacent water masses such as Canada Basin Deep Water (CBDW), Greenland Sea Deep Water (GSDW) and most importantly, Arctic Intermediate Water (AIW), which all had an influence on the ostracod assemblages during the late Quaternary. An enhanced flow of warm saline AIW into the Eurasian Basin results in species-rich upper AODW assemblages having good analogues down to 2750 m in the water column. In contrast, lower AODW assemblages influenced by cold well-oxygenated GSDW give analogues at depths as shallow as 1000 m. The faunal changes are the consequence of rapid climatic fluctuations in the eastern Arctic Ocean during the late Quaternary that are intrinsically linked to palaeoceanographical alternations in warm and cold current inflow from adjacent basins. Category: geoscientificInformation Source: Supplement to: Jones, Richard LI; Whatley, Robin C; Cronin, Thomas M; Dowsett, Harry J (1999): Reconstructing late Quaternary deep-water masses in the eastern Arctic Ocean using benthonic ostracoda. Marine Micropaleontology, 37(3-4), 251-272, https://doi.org/10.1016/S0377-8398(99)00022-5 Supplemental Information: Not Availble Coverage: EVENT LABEL: (PS19/186) * LATITUDE: 87.529300 * LONGITUDE: 144.166200 * DATE/TIME: 1991-09-02T00:00:00 * ELEVATION: -1073.0 m * Penetration: 8.4 m * Recovery: 8.1 m * LOCATION: Lomonosov Ridge, Arctic Ocean * CAMPAIGN: ARK-VIII/3 * BASIS: Polarstern * DEVICE: Kasten corer EVENT LABEL: (PS19/218) * LATITUDE: 85.327700 * LONGITUDE: -14.022000 * DATE/TIME: 1991-09-16T00:00:00 * ELEVATION: -1073.0 m * Penetration: 7.7 m * Recovery: 7.25 m * LOCATION: Morris Jesup Rise * CAMPAIGN: ARK-VIII/3 * BASIS: Polarstern * DEVICE: Kasten corer EVENT LABEL: (PS19/245) * LATITUDE: 82.023700 * LONGITUDE: 15.672300 * DATE/TIME: 1991-09-29T00:00:00 * ELEVATION: -2531.0 m * Penetration: 8.15 m * Recovery: 8.02 m * LOCATION: Yermak Plateau * CAMPAIGN: ARK-VIII/3 * BASIS: Polarstern * DEVICE: Kasten corer

Contributors: Pastouret, L, Chamley, Hervè, Delibrias, G, Duplessy, Jean-Claude, Thiede, Jörn

Date: 1978-11-18

Abstract: The oxygen isotopes ratios of benthic foraminifera and detailed radiocarbon ages of the organic matter of an over 15 m long sediment core from the outer Niger delta allow us to date the oxygen isotope stage boundaries 1/2 to 11500 (+/- 650) years BP, 2/3 to approximately 23000 (+/- 2000) years BP. The composition of the predominantly terrigenous clays and accessory pelagic fossils reflects the evolution of the climate over the southwestern Sahel zone and the response of the Eastern Tropical Atlantic to these climatic fluctuations during the Late Quaternary. The dilution of the pelagic fossil concentrations by the terrigenous material and the oxygen isotopes ratios of planktonic foraminifera indicate large fluctuations in the freshwater discharge from the Niger, with high precipitations over the drainage area of this river from 4500 (+/- 300) to 11500 (+/- 650) years BP and from 11800 (+(- 600) to 13000 (+/- 600) years BP while the time intervals in between were as dry as today. Relative increase of kaolinite during wet phases and the association of smectite, chlorite and attapulgite during dry ones characterize the response of the weathering in the Niger drainage basins to the climatic fluctuations. The occurrence of 10-14 A mixed-layers prior to 26000 years BP is correlated with moderate alteration of the crystalline substratum outcrops from the middle-lower part of the Niger Basin. High quartz concentrations are particularly typical for the transition between oxygen isotope stages 1 and 2 at the inception of heavy precipitations in the southern Sahel zone. Sedimentation rates were quite constant, 30-35 cm/1000 years; they became unusually large at the beginning of the Holocene from 10900 (+/- 650) to 11500 (+/- 650) years BP where they reached more than 600 cm/1000 years. Bottom waters around 1100 m depth in the Gulf of Guinea responded to changes in paleo-oceanography of the entire Atlantic Ocean as well as to local influences. Abnormal carbon isotopes ratios and the drastic changes from a highly diversified fauna (during stages 2 and 3. and during the last part of stage 1 after approx. 7000 years BP) to a poorly diversified fauna in the intervenin time span point to the development of a local benthic environment which cannot easily be compared with the corresponding continental and slope environments of the entire Atlantic Ocean. Category: geoscientificInformation Source: Supplement to: Pastouret, L; Chamley, Hervè; Delibrias, G; Duplessy, Jean-Claude; Thiede, Jörn (1978): Late quaternary climatic changes in western tropical Africa deduced from deep-sea sedimentation off Niger delta. Oceanologica Acta, 1(2), 217-232 Supplemental Information: Not Availble Coverage: EVENT LABEL: (KM31) * LATITUDE: 3.516700 * LONGITUDE: 5.566700 * ELEVATION: -1181.0 m ... Abstract: The oxygen isotopes ratios of benthic foraminifera and detailed radiocarbon ages of the organic matter of an over 15 m long sediment core from the outer Niger delta allow us to date the oxygen isotope stage boundaries 1/2 to 11500 (+/- 650) years BP, 2/3 to approximately 23000 (+/- 2000) years BP. The composition of the predominantly terrigenous clays and accessory pelagic fossils reflects the evolution of the climate over the southwestern Sahel zone and the response of the Eastern Tropical Atlantic to these climatic fluctuations during the Late Quaternary. The dilution of the pelagic fossil concentrations by the terrigenous material and the oxygen isotopes ratios of planktonic foraminifera indicate large fluctuations in the freshwater discharge from the Niger, with high precipitations over the drainage area of this river from 4500 (+/- 300) to 11500 (+/- 650) years BP and from 11800 (+(- 600) to 13000 (+/- 600) years BP while the time intervals in between were as dry as today. Relative increase of kaolinite during wet phases and the association of smectite, chlorite and attapulgite during dry ones characterize the response of the weathering in the Niger drainage basins to the climatic fluctuations. The occurrence of 10-14 A mixed-layers prior to 26000 years BP is correlated with moderate alteration of the crystalline substratum outcrops from the middle-lower part of the Niger Basin. High quartz concentrations are particularly typical for the transition between oxygen isotope stages 1 and 2 at the inception of heavy precipitations in the southern Sahel zone. Sedimentation rates were quite constant, 30-35 cm/1000 years; they became unusually large at the beginning of the Holocene from 10900 (+/- 650) to 11500 (+/- 650) years BP where they reached more than 600 cm/1000 years. Bottom waters around 1100 m depth in the Gulf of Guinea responded to changes in paleo-oceanography of the entire Atlantic Ocean as well as to local influences. Abnormal carbon isotopes ratios and the drastic changes from a highly diversified fauna (during stages 2 and 3. and during the last part of stage 1 after approx. 7000 years BP) to a poorly diversified fauna in the intervenin time span point to the development of a local benthic environment which cannot easily be compared with the corresponding continental and slope environments of the entire Atlantic Ocean. Category: geoscientificInformation Source: Supplement to: Pastouret, L; Chamley, Hervè; Delibrias, G; Duplessy, Jean-Claude; Thiede, Jörn (1978): Late quaternary climatic changes in western tropical Africa deduced from deep-sea sedimentation off Niger delta. Oceanologica Acta, 1(2), 217-232 Supplemental Information: Not Availble Coverage: EVENT LABEL: (KM31) * LATITUDE: 3.516700 * LONGITUDE: 5.566700 * ELEVATION: -1181.0 m

Contributors: Nees, Stefan

Date: 1993-09-18

Abstract: Four long sediment cores from locations in the Framstrait, the Norwegian-Greenland Seas and the northern North Atlantic were analysed in a high resolution sampling mode (1 - 2 cm density) for their benthic foraminiferal content. In particular the impact of the intense climatic changes at glacial/interglacial transitions (terminations I and II) on the benthic community have been of special interest. The faunal data were investigated by means of multivariate analysis and represented in their chronological occurence. The most prominent species of benthic foraminifera in the Norwegian-Greenland Seas are Oridorsalis umbonatus, Cibicidoides wuellerstorfi, the group of Cassidulina, Pyrgo rotalaria, Globocassidulina subglobosa and fragmented tubes of arenaceous species. The climatic signal of termination I as well as termination II is recorded in the fossil foraminiferal tests as divided transition from glacial to interglacial. The elder INDAR maximum (individuals accumulation rate = individuals/sq cm * 1.000 y; Norwegian-Greenland Seas: average 3.000 - 6.000 individuals/sq cm * 1.000 y; northern North Atlantic: average 150 individuals/sq cm * 1.000 y) is followed by a period of decreased values. The second, younger maximum reaches comparable values as the elder maximum. The interglacial INDAR are in average 700 individuals/sq cm * 1.000 y in the Norwegian-Greenland Seas and 200 individuals/sq cm * 1.000 y in average in the northern North Atlantic. The occurence of the elder INDAR maximum shows a distinct chronological transgressivity between the northern North Atlantic (12.400 ybp.) and the Framstrait (8.900 ybp.). The time shift from south to north amounts 3.500 yrs., the average expanding velocity 0,78 km per year. Within the Norwegian-Greenland Seas the average expanding velocity amounts 0,48 km per year. This chronological transgressivity is interpreted as impact of the progressive expanding of the North Atlantic and the Norwegian Current during the deglaciation. The dynamic of the faunal development is defined as increasing INDAR per time. The elder INDAR maximum shows in both glacial/interglacial transitions an exponential increase from south to north. Termination II is characterized by a general higher dynamic as termination I. By means of the high resolution sampling density the impact of regional isotopic recognized melt-water events is recognized by an increase of endobenthic and t-ubiquitous species in the Norwegian-Greenland Seas sediments. During termination I the relative minimum between both INDAR maxima occur chronological with an decrease of calculated sea surface temperatures. This is interpreted as indication of the close pelagic - benthic coupling. The climatic signal in the northern North Atlantic recorded in the fossil benthic foraminiferal community shows a lower amplitude as in the Norwegian-Greenland Seas. The occurence of the epibenthic Cibicidoides wuellersforfi allows to evaluate the variability of the bottom water mass. In general at all core locations increasing lateral bottom currents are recognized with the occurence of the second younger INDAR maximum. In comparison with various paleo-climatological data sets fossil benthic foraminifers show a distinct koherence with changes of the atmospheric temperatures, the SSTs and the postglacial sea level increase. The benthic foraminiferal fauna is bound indirectly on and indicative for regional climatic changes, but principal dependent upon global climatic changes. Category: geoscientificInformation Source: Supplement to: Nees, Stefan (1993): Spätquartäre Benthosforaminiferen des Europäischen Nordmeeres: Veränderungen der Artengesellschaften und Akkumulationsraten bei Klimawechseln. Berichte aus dem Sonderforschungsbereich 313, Christian-Albrechts-Universität, Kiel, 44, 80 pp, https://doi.org/10.2312/reports-sfb313.1993.44 Supplemental Information: Not Availble Coverage: EVENT LABEL: * LATITUDE: 67.833333 * LONGITUDE: 1.505000 * DATE/TIME: 1986-07-11T00:00:00 * ELEVATION: -2230.0 m * Penetration: 8.5 m * Recovery: 4.6 m * LOCATION: Norwegian Sea * CAMPAIGN: M2/2 * BASIS: Meteor (1986) * DEVICE: Kasten corer EVENT LABEL: * LATITUDE: 73.171667 * LONGITUDE: 10.943333 * DATE/TIME: 1988-07-10T00:00:00 * ELEVATION: -2061.0 m * Penetration: 12.75 m * Recovery: 9.6 m * LOCATION: Arctic Ocean * CAMPAIGN: M7/2 * BASIS: Meteor (1986) * DEVICE: Piston corer (Kiel type) EVENT LABEL: (M23414) * LATITUDE: 53.536660 * LONGITUDE: -20.288330 * DATE/TIME: 1991-08-22T00:00:00 * ELEVATION: -2196.0 m * Penetration: 10.5 m * Recovery: 9.08 m * LOCATION: Northeast Atlantic * CAMPAIGN: M17/2 * BASIS: Meteor (1986) * DEVICE: Kasten corer EVENT LABEL: (GIK21906-2 PS17/081) * LATITUDE: 76.846300 * LONGITUDE: -2.150500 * DATE/TIME: 1990-07-03T00:00:00 * ELEVATION: -2901.0 m * Penetration: 6.8 m * Recovery: 6.52 m * LOCATION: Greenland Sea * CAMPAIGN: ARK-VII/1 * BASIS: Polarstern * DEVICE: Kasten corer ... Abstract: Four long sediment cores from locations in the Framstrait, the Norwegian-Greenland Seas and the northern North Atlantic were analysed in a high resolution sampling mode (1 - 2 cm density) for their benthic foraminiferal content. In particular the impact of the intense climatic changes at glacial/interglacial transitions (terminations I and II) on the benthic community have been of special interest. The faunal data were investigated by means of multivariate analysis and represented in their chronological occurence. The most prominent species of benthic foraminifera in the Norwegian-Greenland Seas are Oridorsalis umbonatus, Cibicidoides wuellerstorfi, the group of Cassidulina, Pyrgo rotalaria, Globocassidulina subglobosa and fragmented tubes of arenaceous species. The climatic signal of termination I as well as termination II is recorded in the fossil foraminiferal tests as divided transition from glacial to interglacial. The elder INDAR maximum (individuals accumulation rate = individuals/sq cm * 1.000 y; Norwegian-Greenland Seas: average 3.000 - 6.000 individuals/sq cm * 1.000 y; northern North Atlantic: average 150 individuals/sq cm * 1.000 y) is followed by a period of decreased values. The second, younger maximum reaches comparable values as the elder maximum. The interglacial INDAR are in average 700 individuals/sq cm * 1.000 y in the Norwegian-Greenland Seas and 200 individuals/sq cm * 1.000 y in average in the northern North Atlantic. The occurence of the elder INDAR maximum shows a distinct chronological transgressivity between the northern North Atlantic (12.400 ybp.) and the Framstrait (8.900 ybp.). The time shift from south to north amounts 3.500 yrs., the average expanding velocity 0,78 km per year. Within the Norwegian-Greenland Seas the average expanding velocity amounts 0,48 km per year. This chronological transgressivity is interpreted as impact of the progressive expanding of the North Atlantic and the Norwegian Current during the deglaciation. The dynamic of the faunal development is defined as increasing INDAR per time. The elder INDAR maximum shows in both glacial/interglacial transitions an exponential increase from south to north. Termination II is characterized by a general higher dynamic as termination I. By means of the high resolution sampling density the impact of regional isotopic recognized melt-water events is recognized by an increase of endobenthic and t-ubiquitous species in the Norwegian-Greenland Seas sediments. During termination I the relative minimum between both INDAR maxima occur chronological with an decrease of calculated sea surface temperatures. This is interpreted as indication of the close pelagic - benthic coupling. The climatic signal in the northern North Atlantic recorded in the fossil benthic foraminiferal community shows a lower amplitude as in the Norwegian-Greenland Seas. The occurence of the epibenthic Cibicidoides wuellersforfi allows to evaluate the variability of the bottom water mass. In general at all core locations increasing lateral bottom currents are recognized with the occurence of the second younger INDAR maximum. In comparison with various paleo-climatological data sets fossil benthic foraminifers show a distinct koherence with changes of the atmospheric temperatures, the SSTs and the postglacial sea level increase. The benthic foraminiferal fauna is bound indirectly on and indicative for regional climatic changes, but principal dependent upon global climatic changes. Category: geoscientificInformation Source: Supplement to: Nees, Stefan (1993): Spätquartäre Benthosforaminiferen des Europäischen Nordmeeres: Veränderungen der Artengesellschaften und Akkumulationsraten bei Klimawechseln. Berichte aus dem Sonderforschungsbereich 313, Christian-Albrechts-Universität, Kiel, 44, 80 pp, https://doi.org/10.2312/reports-sfb313.1993.44 Supplemental Information: Not Availble Coverage: EVENT LABEL: * LATITUDE: 67.833333 * LONGITUDE: 1.505000 * DATE/TIME: 1986-07-11T00:00:00 * ELEVATION: -2230.0 m * Penetration: 8.5 m * Recovery: 4.6 m * LOCATION: Norwegian Sea * CAMPAIGN: M2/2 * BASIS: Meteor (1986) * DEVICE: Kasten corer EVENT LABEL: * LATITUDE: 73.171667 * LONGITUDE: 10.943333 * DATE/TIME: 1988-07-10T00:00:00 * ELEVATION: -2061.0 m * Penetration: 12.75 m * Recovery: 9.6 m * LOCATION: Arctic Ocean * CAMPAIGN: M7/2 * BASIS: Meteor (1986) * DEVICE: Piston corer (Kiel type) EVENT LABEL: (M23414) * LATITUDE: 53.536660 * LONGITUDE: -20.288330 * DATE/TIME: 1991-08-22T00:00:00 * ELEVATION: -2196.0 m * Penetration: 10.5 m * Recovery: 9.08 m * LOCATION: Northeast Atlantic * CAMPAIGN: M17/2 * BASIS: Meteor (1986) * DEVICE: Kasten corer EVENT LABEL: (GIK21906-2 PS17/081) * LATITUDE: 76.846300 * LONGITUDE: -2.150500 * DATE/TIME: 1990-07-03T00:00:00 * ELEVATION: -2901.0 m * Penetration: 6.8 m * Recovery: 6.52 m * LOCATION: Greenland Sea * CAMPAIGN: ARK-VII/1 * BASIS: Polarstern * DEVICE: Kasten corer

Contributors: Mackensen, Andreas, Grobe, Hannes, Hubberten, Hans-Wolfgang, Spieß, Volkhard, Fütterer, Dieter K

Date: 1989-11-24

South Atlantic in Late Quaternary: Reconstruction of Budget and Currents...Abstract: A stable isotope record from the eastern Weddell Sea from 69°S is presented. For the first time, a 250,000-yr record from the Southern Ocean can be correlated in detail to the global isotope stratigraphy. Together with magnetostratigraphic, sedimentological and micropalaeontological data, the stratigraphic control of this record can be extended back to 910,000 yrs B.P. A time scale is constructed by linear interpolation between confirmed stratigraphic data points. The benthic d18O record (Epistominella exigua) reflects global continental ice volume changes during the Brunhes and late Matuyama chrons, whereas the planktonic isotopic record (Neogloboquadrina pachyderma) may be influenced by a meltwater lid caused by the nearby Antarctic ice shelf and icebergs. The worldwide climatic improvement during deglaciations is documented in the eastern Weddell Sea by an increase in production of siliceous plankton followed, with a time lag of approximately 10,000 yrs, by planktonic foraminifera production. Peak values in the difference between planktonic and benthic d13C records, which are 0.5 per mil higher during warm climatic periods than during times with expanded continental ice sheets, also suggest increased surface productivity during interglacials in the Southern Ocean. Category: geoscientificInformation Source: Supplement to: Mackensen, Andreas; Grobe, Hannes; Hubberten, Hans-Wolfgang; Spieß, Volkhard; Fütterer, Dieter K (1989): Stable isotope stratigraphy from the Antarctic continental margin during the last one million years. Marine Geology, 87(2-4), 315-321, https://doi.org/10.1016/0025-3227(89)90068-6 Supplemental Information: Not Availble Coverage: EVENT LABEL: (PS08/366) * LATITUDE: -69.033330 * LONGITUDE: -5.916660 * DATE/TIME: 1985-12-28T20:53:00 * ELEVATION: -2526.0 m * Penetration: 15.2 m * Recovery: 12.38 m * LOCATION: Atka Bay * CAMPAIGN: ANT-IV/3 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type)...Paleoenvironmental Reconstructions from Marine Sediments @ AWI ... Abstract: A stable isotope record from the eastern Weddell Sea from 69°S is presented. For the first time, a 250,000-yr record from the Southern Ocean can be correlated in detail to the global isotope stratigraphy. Together with magnetostratigraphic, sedimentological and micropalaeontological data, the stratigraphic control of this record can be extended back to 910,000 yrs B.P. A time scale is constructed by linear interpolation between confirmed stratigraphic data points. The benthic d18O record (Epistominella exigua) reflects global continental ice volume changes during the Brunhes and late Matuyama chrons, whereas the planktonic isotopic record (Neogloboquadrina pachyderma) may be influenced by a meltwater lid caused by the nearby Antarctic ice shelf and icebergs. The worldwide climatic improvement during deglaciations is documented in the eastern Weddell Sea by an increase in production of siliceous plankton followed, with a time lag of approximately 10,000 yrs, by planktonic foraminifera production. Peak values in the difference between planktonic and benthic d13C records, which are 0.5 per mil higher during warm climatic periods than during times with expanded continental ice sheets, also suggest increased surface productivity during interglacials in the Southern Ocean. Category: geoscientificInformation Source: Supplement to: Mackensen, Andreas; Grobe, Hannes; Hubberten, Hans-Wolfgang; Spieß, Volkhard; Fütterer, Dieter K (1989): Stable isotope stratigraphy from the Antarctic continental margin during the last one million years. Marine Geology, 87(2-4), 315-321, https://doi.org/10.1016/0025-3227(89)90068-6 Supplemental Information: Not Availble Coverage: EVENT LABEL: (PS08/366) * LATITUDE: -69.033330 * LONGITUDE: -5.916660 * DATE/TIME: 1985-12-28T20:53:00 * ELEVATION: -2526.0 m * Penetration: 15.2 m * Recovery: 12.38 m * LOCATION: Atka Bay * CAMPAIGN: ANT-IV/3 * BASIS: Polarstern * DEVICE: Gravity corer (Kiel type)

Contributors: Andrews, John T

Date: 1987-07-23

Abstract: Piston cores from fiords, shelf troughs, and the deep-sea off eastern Baffin Island, N.W.T., Canada, have been sampled for texture and detrital carbonate in the sediments consist primarily of silty clays usually containing sediment accumulation (kg/m**2/ka) over the last ca. 10 ka. Three sets, of two cores each, lie on a fiord-shelf transect and thus define variations in sediment accumulation gradients. These continental margin data are compared with cruder estimates of Holocene sediment accumulation at three sites farther offshore in Baffin Bay, Davis Strait and the northern Labrador Sea. Minimum accumulation in a 2 ka interval was 200 kg/m2 with a maximum estimate of 8,800 kg/m2. Detrital carbonate accumulation varies between 0 and 1,300 kg/m**2. Median accumulation for a typical fiord-shelf-deep-sea transect over the last 10 ka have been 10,340, 3493 and 820 kg/m**2. At DSDP Leg, site 645 in central Baffin Bay, the sedimentation rate ranged between 40 and 130 m/Ma (ca. 400 and 1200 kg/m**2/2ka); that is, comparable with the Late Quaternary input into Baffin Bay. Category: geoscientificInformation Source: Supplement to: Andrews, John T (1987): Late Quaternary marine sediment accumulation in fjord-shelf-deep-sea transects, Baffin Island to Baffin Bay. Quaternary Science Reviews, 6(3-4), 231-243, https://doi.org/10.1016/0277-3791(87)90006-0 Supplemental Information: Not Availble Coverage: EVENT LABEL: * LATITUDE: 62.766667 * LONGITUDE: -59.366667 * ELEVATION: -1057.0 m * Recovery: 7 m * LOCATION: Baffin Bay * DEVICE: Piston corer EVENT LABEL: * LATITUDE: 70.706667 * LONGITUDE: -64.978333 * ELEVATION: -2041.0 m * Recovery: 7.03 m * LOCATION: Baffin Bay * DEVICE: Piston corer EVENT LABEL: * LATITUDE: 61.850833 * LONGITUDE: -64.200500 * ELEVATION: -487.0 m * Recovery: 3.15 m * LOCATION: Baffin Shelf * DEVICE: Piston corer EVENT LABEL: * LATITUDE: 62.834167 * LONGITUDE: -67.034000 * ELEVATION: -570.0 m * Recovery: 9.69 m * LOCATION: Baffin Bay * DEVICE: Piston corer EVENT LABEL: * LATITUDE: 71.217000 * LONGITUDE: -71.484667 * ELEVATION: -832.0 m * Recovery: 5.81 m * LOCATION: Baffin Bay * DEVICE: Piston corer EVENT LABEL: * LATITUDE: 68.250833 * LONGITUDE: -65.201500 * ELEVATION: -457.0 m * Recovery: 5.93 m * LOCATION: Baffin Bay * DEVICE: Piston corer EVENT LABEL: * LATITUDE: 71.083330 * LONGITUDE: -71.883330 * ELEVATION: -683.0 m * Recovery: 10.16 m * LOCATION: Baffin Bay * DEVICE: Piston corer EVENT LABEL: * LATITUDE: 69.191667 * LONGITUDE: -68.391667 * ELEVATION: -487.0 m * Recovery: 11.41 m * LOCATION: Baffin Bay * DEVICE: Piston corer EVENT LABEL: * LATITUDE: 66.555000 * LONGITUDE: -61.710000 * ELEVATION: -146.0 m * Recovery: 7.7 m * LOCATION: Baffin Bay...Quaternary Science Reviews ... Abstract: Piston cores from fiords, shelf troughs, and the deep-sea off eastern Baffin Island, N.W.T., Canada, have been sampled for texture and detrital carbonate in the <2 mm fraction. The sediments consist primarily of silty clays usually containing <5% sand. Estimates are made for sediment accumulation (kg/m**2/ka) over the last ca. 10 ka. Three sets, of two cores each, lie on a fiord-shelf transect and thus define variations in sediment accumulation gradients. These continental margin data are compared with cruder estimates of Holocene sediment accumulation at three sites farther offshore in Baffin Bay, Davis Strait and the northern Labrador Sea. Minimum accumulation in a 2 ka interval was 200 kg/m2 with a maximum estimate of 8,800 kg/m2. Detrital carbonate accumulation varies between 0 and 1,300 kg/m**2. Median accumulation for a typical fiord-shelf-deep-sea transect over the last 10 ka have been 10,340, 3493 and 820 kg/m**2. At DSDP Leg, site 645 in central Baffin Bay, the sedimentation rate ranged between 40 and 130 m/Ma (ca. 400 and 1200 kg/m**2/2ka); that is, comparable with the Late Quaternary input into Baffin Bay. Category: geoscientificInformation Source: Supplement to: Andrews, John T (1987): Late Quaternary marine sediment accumulation in fjord-shelf-deep-sea transects, Baffin Island to Baffin Bay. Quaternary Science Reviews, 6(3-4), 231-243, https://doi.org/10.1016/0277-3791(87)90006-0 Supplemental Information: Not Availble Coverage: EVENT LABEL: * LATITUDE: 62.766667 * LONGITUDE: -59.366667 * ELEVATION: -1057.0 m * Recovery: 7 m * LOCATION: Baffin Bay * DEVICE: Piston corer EVENT LABEL: * LATITUDE: 70.706667 * LONGITUDE: -64.978333 * ELEVATION: -2041.0 m * Recovery: 7.03 m * LOCATION: Baffin Bay * DEVICE: Piston corer EVENT LABEL: * LATITUDE: 61.850833 * LONGITUDE: -64.200500 * ELEVATION: -487.0 m * Recovery: 3.15 m * LOCATION: Baffin Shelf * DEVICE: Piston corer EVENT LABEL: * LATITUDE: 62.834167 * LONGITUDE: -67.034000 * ELEVATION: -570.0 m * Recovery: 9.69 m * LOCATION: Baffin Bay * DEVICE: Piston corer EVENT LABEL: * LATITUDE: 71.217000 * LONGITUDE: -71.484667 * ELEVATION: -832.0 m * Recovery: 5.81 m * LOCATION: Baffin Bay * DEVICE: Piston corer EVENT LABEL: * LATITUDE: 68.250833 * LONGITUDE: -65.201500 * ELEVATION: -457.0 m * Recovery: 5.93 m * LOCATION: Baffin Bay * DEVICE: Piston corer EVENT LABEL: * LATITUDE: 71.083330 * LONGITUDE: -71.883330 * ELEVATION: -683.0 m * Recovery: 10.16 m * LOCATION: Baffin Bay * DEVICE: Piston corer EVENT LABEL: * LATITUDE: 69.191667 * LONGITUDE: -68.391667 * ELEVATION: -487.0 m * Recovery: 11.41 m * LOCATION: Baffin Bay * DEVICE: Piston corer EVENT LABEL: * LATITUDE: 66.555000 * LONGITUDE: -61.710000 * ELEVATION: -146.0 m * Recovery: 7.7 m * LOCATION: Baffin Bay