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Abstract: Not Available Category: geoscientificInformation Source: Not Available Supplemental Information: Not Availble Coverage: EVENT LABEL: (Mayo) * LATITUDE: 54.304920 * LONGITUDE: -9.464410 * DATE/TIME: 1992-01-18T00:00:00 * ELEVATION: 136.0 m * METHOD/DEVICE: Monolith boxes
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Abstract: We present the collection of magnetic field absolute measurements performed by early soviet magnetic survey missions Kosmos-49 (1964) and Kosmos-321 (1970). Totally 17300 measured values are available for Kosmos-49 mission, covering homogeneously 75% of the Earth's surface between 49° north and south latitude. About 5000 measured values are available for Kosmos-321 mission, covering homogeneously 94% of the Earth's surface between 71° north and south latitude. Both satellites had two measurement devices. The data from Kosmos-312 derives from the device that provided the stronger signal during the time of measurement. In case of Kosmos-49 the devices were switched on and off regularly, resulting in the two herein presented data tables for this mission. Category: geoscientificInformation Source: Not Available Supplemental Information: Not Availble Coverage: Not Available
Data Types:
  • Tabular Data
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Abstract: A series of catastrophic iceberg discharges termed Heinrich events punctuated the last ice age in the North Atlantic. During Heinrich events, coarse terrigenous debris released from the drifting icebergs and preserved in deep-sea sediments serves as an indicator of their passage. Quantifying the vertical flux of ice-rafted debris (IRD) in pelagic sediments can resolve questions regarding the timing and variation in ice sheet calving intensity. In this study, 230Thxs-based IRD flux was measured throughout the last glacial period in a deep-sea sediment core from the western North Atlantic (EW9303-37JPC, 43.68°N, 46.28°W, 3981 m), and complemented during Marine Isotope Stages (MIS) 1-3 by measurements from DY081-GVY01 (50.16°N, 45.51°W, 3721m) in the Labrador Sea. The cores are downstream from the Hudson Strait, a leading candidate for the conduit of the icebergs from the Laurentide ice sheet (LIS). We compare our results with the directly equivalent existing data in the eastern North Atlantic, and show that EW37JPC and DY001GVY have higher IRD fluxes during all Heinrich events, notably including 3 and 6. This study demonstrates that the Laurentide played a role in all Heinrich events and raises the likelihood that a single mechanism can account for their genesis. Category: geoscientificInformation Source: Not Available Supplemental Information: Not Availble Coverage: Not Available
Data Types:
  • Tabular Data
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Abstract: Due to changing temperature regimes in the North- and the Wadden Sea, a fish survey in the Sylt Rømø bight (SRB) was established in 2007 for at least ten years. The aim is to investigate the Wadden Sea fish fauna with special interest in changes of migration behavior, species composition and feeding habits. Seven stations are sampled monthly inside the SRB. Two additional stations, one outside the bight, one close to the Danish border are sampled as references four times a year. For sampling a mini bottom trawl, total length 17 m, trawl opening 7 m, height 3 m with a mesh size of 36 mm in the wings, 16 mm in the mid part and 6 mm in the cod end is used. At every station one haul in the water column and another at the bottom are sampled, for 15 minutes at a speed of approximately 2 knots. The data will help to give a more detailed picture of food chains and energy flows inside the Wadden Sea. Category: geoscientificInformation Source: Not Available Supplemental Information: Not Availble Coverage: EVENT LABEL: * LATITUDE: 55.070000 * LONGITUDE: 8.450000 * LOCATION: Sylt, Rømø bight, North Sea * CAMPAIGN: Long-term time series Sylt * METHOD/DEVICE: Trawl net
Data Types:
  • Tabular Data
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Abstract: Scatterometer data acquired in Ku-band from the QuikSCAT satellite have been used to identify midwinter melt events over Greenland. The focus was set on winter months (November-March) 2000 to 2008. Several approaches were examined for their capability of detecting thaw events. In the first case the change of the backscatter coefficient sigma0 based on a three-day moving window was used. In the second case the difference between two consecutive days was used. Two types of parameterization have been investigated for both cases: a constant threshold of 1.5 dB (Approach I and III) and a location specific noise level (Approach II and IV). Thaw events were detected for all winters, however, the spatially largest extent was found during late November in 2005 in case of all approaches. The dataset (csv files) includes the results from all four approaches. Grid spacing is 10km (pre-processed based on Bartsch et al. 2007). The following values are provided for each detected event: grid point ID (GP_NAME), latitude, longitude, date, depending on the approach a three day average difference or a day to day difference of sigma0 and if used (Approach II and IV) the location specific noise multiplied by three. Shape files are provided for the three largest detected events in addition: 26.11.-30.11.2005, 17.11.-21.11.2007 and 01.-04.11.2008. No Data value is -9999. Algorithm details and overview maps are provided in Freund (2017). Category: geoscientificInformation Source: Not Available Supplemental Information: Not Availble Coverage: EVENT LABEL: * LATITUDE: 66.000000 * LONGITUDE: -43.000000 * METHOD/DEVICE: derived from Quick Scatterometer (QuikSCAT)
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  • Tabular Data
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Abstract: The data set contains a chemical analysis of the salt species from two salt deserts showing salt polygons at the surface. The data set is used together with other data sets (which characterize the environmental conditions, surface and subsurface of the deserts) to explain the driving mechanism of salt polygon growth in salt deserts. Different salt species crystallize in spatially separated patches. These patches were visually identified and sampled. Salt samples from the salt crust were collected at two sites at Owens Lake, Central California. Samples were dried, and pulverized and their mineral composition was analyzed using quantitative XRD. Pore water was collected from the subsurface at two sites at Badwater Basin (also central California) and 15 sites at Owens Lake. Elemental composition of the pore water was analyzed using ICPOES. All samples were collected during two field campaigns in November / December 2016 and January 2018. Related to this data are also - grain size distributions of sand samples taken at the field sites at different depths (see data at https://doi.pangaea.de/10.1594/PANGAEA.910996), - pictures and videos characterizing the sites (see data at https://doi.pangaea.de/10.1594/PANGAEA.911054), - salinity profiles from cross-sections below polygons and background salt concentration measurements (see data at https://doi.pangaea.de/10.1594/PANGAEA.911059), - surface scans measured by TLS (see data at https://doi.pangaea.de/10.1594/PANGAEA.911233) and - temperature and humidity time-series measured during one week in late 2016 (see data at https://doi.pangaea.de/10.1594/PANGAEA.911139). Category: geoscientificInformation Source: Not Available Supplemental Information: Not Availble Coverage: Not Available
Data Types:
  • Tabular Data
  • Text
Abstract: Silicon isotope records from diatoms can be used as a proxy for the relative consumption of dissolved silicic acid (DSi) in surface waters. Silicon isotopes in sponges provide information on the concentration of DSi within the ambient seawater in which the sponges reside. Here we provide deglacial silicon isotope records from both diatoms (d30Si_diat) and sponges (d30Si_sponge) collected in three piston cores from the Southern Ocean. Isolated diatom samples were produced from bulk sediment by mechanical separation and chemical cleaning. Pure diatom samples were digested in 0.1 M NaOH before removal of matrix via cation exchange chromatography. The samples were analysed by MC-ICP-MS at the University of Edinburgh. Sponge spicules were individually picked from sediment and underwent the same analytical procedure as decribed above. We relate the d30Si_diat records to changes in the deep upwelling DSi supply and diatom demand for DSi in the Southern Ocean surface across the deglaciation. We suggest that during the late deglaciation, the supply increased dramatically, leading to a decline in the d30Si_diat in all records. The d30Si_sponge data were used in conjunction with older previously published data to elucidate how a restructing of the deep ocean - which supplies DSi to the Southern Ocean - during the deglaciation, could explain the apparent increase in DSi supply that is recorded in the d30Si_diat data. Category: geoscientificInformation Source: Not Available Supplemental Information: Not Availble Coverage: Not Available
Data Types:
  • Tabular Data
  • Text
Abstract: The data set contains temperature and humidity time-series from a salt desert showing salt polygons at the surface. The data set characterizes the environmental conditions of the salt deserts and is used together with other data sets (which characterize the surface and subsurface of the desert) to explain the driving mechanism of salt polygon growth in salt deserts. For three sites, temperature data loggers of type HiTemp140 with measurement precision of 0.01°C and humidity data loggers of type RHTemp1000IS with a precision of 0.1% were placed at the center of a salt polygon and inside a salt ridge to enable a comparison between center- and ridge values for temperature and humidity. Data loggers were active for 7 days in late 2016 and recorded temperature and humidity values every minute. Measurements were conducted at 3 sites at Owens Lake, Central California. All data was recorded during a field campaign in November and December 2016. Related to this data are also - grain size distributions of sand samples taken at the field sites at different depths (see data at https://doi.pangaea.de/10.1594/PANGAEA.910996), - pictures and videos characterizing the sites (see data at https://doi.pangaea.de/10.1594/PANGAEA.911054), - salinity profiles from cross-sections below polygons and background salt concentration measurements (see data at https://doi.pangaea.de/10.1594/PANGAEA.911059), - as well as surface scans measured by TLS (see data at https://doi.pangaea.de/10.1594/PANGAEA.911233) - and a chemical characterization of the salt species present in the crust (see data at https://doi.pangaea.de/10.1594/PANGAEA.911239). Category: geoscientificInformation Source: Not Available Supplemental Information: Not Availble Coverage: Not Available
Data Types:
  • Tabular Data
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Abstract: We measured several sedimentological (Grain Size, Total Organic Carbon, Hydrogen Index (HI) Oxygen Index (OI), Magnetic Susceptibility, Spectrocolorimetry (Reflectance L* and Wavelengths), Short-lived radionuclides) and geochemical (XRF, Trace Metals concentrations) parameters along sediment cores collected in water-dependant areas (ponds) from the lower Eure River to reconstruct the anthropogenic activities that have occurred in the watershed since 1940s. Category: geoscientificInformation Source: Not Available Supplemental Information: Not Availble Coverage: Not Available
Data Types:
  • Tabular Data
  • Text
Abstract: The data set contains subsurface salt concentration profiles and pore water density measurements from salt deserts showing salt polygons at the surface. The data set characterizes the subsurface of the salt deserts and is used together with other data sets (which characterize the surface) to explain the driving mechanism of salt polygon growth in salt deserts. For each site, the sand in a cross-sectional area of about 2 m x 1 m below a salt polygon was sampled with a horizontal and vertical resolution of 15 cm and 10 cm respectively. Samples were then analyzed for their salt content to resolve salinity gradients present below the salt polygon patterns at the surface. Additionally, pore water at the sites was sampled from the surface and at a depth of ~1 m to measure the surface and background salinity. The pore water was then analyzed using a vibrating-tube densimeter with a measurement accuracy of 5 x 10^(-4) g/cm^3. Samples used to compile salt concentration profiles were taken at 3 different sites, samples of pore water were taken at 8 different sites. All samples were collected during a field campaign at Owens Lake, Central California in January 2018. Related to this data are also - grain size distributions of sand samples taken at the field sites at different depths (see data at https://doi.pangaea.de/10.1594/PANGAEA.910996), - pictures and videos characterizing the sites (see data at https://doi.pangaea.de/10.1594/PANGAEA.911054), - temperature and humidity time-series measured during one week in late 2016 (see data at https://doi.pangaea.de/10.1594/PANGAEA.911139), - as well as surface scans measured by TLS (see data at https://doi.pangaea.de/10.1594/PANGAEA.911233) - and a chemical characterization of the salt species present in the crust (see data at https://doi.pangaea.de/10.1594/PANGAEA.911239). Category: geoscientificInformation Source: Not Available Supplemental Information: Not Availble Coverage: Not Available
Data Types:
  • Tabular Data
  • Text