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Abstract: Physical and chemical properties of core SWERUS-C3-L2-13-PC from the Arlis Plateau, Arctic Ocean. The dataset was used to integrate the core into the regional stratigraphy and evaluate its palaeo- and rock magnetic properties in this context. Physical and chemical properties were measured at Stockholm University (Sweden). Magnetic properties were measured at Uppsala University (Sweden). Category: geoscientificInformation Source: Not Available Supplemental Information: Not Availble Coverage: Not Available
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Abstract: Copepod samples were taken during the Antarctic expedition PS 79 (ANT XXVIII/2) with RV Polarstern (Cape Town – Cape Town, 3 Dec 2011 – 5 Jan 2012). Copepods were collected at Station 53 (60° 3.22'S, 0° 2.14' E) in the Antarctic Weddell Gyre on 28 December 2011 by vertical bongo net hauls down to 300 m depth. Specimens of C. acutus (210 copepodids CV and 160 females) and of C. propinquus (125 females, no CV stages available) were gently sorted from the catch, maintained alive in filtered seawater at 0°C in a cooling container on board and transported to Germany at 0°C by airplane. Feeding carbon-labelled diatoms to these copepods during 9 days of feeding ,13C elucidated assimilation and turnover rates of copepod total lipids as well as specific fatty acids and alcohols. The 13C incorporation into these compounds was monitored by compound-specific stable isotope analysis (CSIA). The differences in lipid assimilation and turnover clearly show that the copepod species exhibit a high variability and plasticity to adapt their lipid production to their various life phases. Category: geoscientificInformation Source: Not Available Supplemental Information: Not Availble Coverage: EVENT LABEL: * LATITUDE: -60.053670 * LONGITUDE: 0.035670 * DATE/TIME: 2011-12-28T05:21:00 * ELEVATION: -5366.0 m * LOCATION: South Atlantic Ocean * CAMPAIGN: ANT-XXVIII/2 * BASIS: Polarstern * METHOD/DEVICE: Bongo net
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Abstract: Collapse of permafrost coasts delivers large quantities of particulate organic carbon (POC) to arctic coastal areas. The objective of this study is to assess the pathways and fate of POC derived from thawing and eroding permafrost coasts in the nearshore zone, to better understand its impact on the carbon cycle and climate. We collected suspended particulate matter and sediment samples at the coastline and in the nearshore zone of Herschel Island - Qikiqtaruk (N 69.60°; W 139.00°) during a two‐week period in July‐August 2017. Locations were labelled A - H clockwise around the island, starting at the NE corner (Collinson Head). Samples were taken in transects perpendicular to the coast, at point locations offshore ('Monitoring point 1 - 3'), and from 'thaw streams', creeks carrying material from retrogressive thaw slumps and other abrupt thaw features, at various locations around the island. A total of 49 locations were visited; 12 at thaw streams, and 37 in the nearshore zone ranging from right at the shoreline to up to 20 m water depth (about 2 km offshore). We performed biogeochemical analyses (CN, δ13C, Δ14C) and sedimentological analyses (grain size, mineral surface area) in order to trace the pathway of permafrost material from its source to the nearshore water column and sediments. Category: geoscientificInformation Source: Not Available Supplemental Information: Not Availble Coverage: Not Available
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Abstract: In a culture experiment with microalgae metacommunities, we tested the effects of a regional heatwave disturbance on species diversity (richness, Shannon diversity) and turnover. The metacommunities consisted of three local communities with different initial community compositions. In our full factorial design, half of the metacommunities were subject to dispersal (every other day) and exposed to an experimental heatwave. Communities were sampled after 5, 12, and 21 days. Category: geoscientificInformation Source: Not Available Supplemental Information: Not Availble Coverage: Not Available
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Abstract: We obtained altered basaltic upper basement from the modern Nankai Trough seaward of the trench, recovered by drilling on IODP Expedition 333. We performed laboratory friction experiments on bare surfaces and gouge powders of this material, in addition to and in combination with other materials for comparison. Based our friction data, we suggest that in addition to creep the altered Nankai basalts may also allow the possibility of slow slip events. Category: geoscientificInformation Source: Not Available Supplemental Information: Not Availble Coverage: Not Available
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Abstract: The data comprise sample locations and results of grain size measurements and optically stimulated luminescence dating of sediments from the Orog Nuur Basin (southern Mongolia). Samples were taken in order to gain a comprehensive sedimentological and geochronological overview over late Quaternary sediment cascades and respective archives. Grain size measurements were conducted in Aachen using a Beckmann Coulter Laser Particle Sizer. OSL data were obtained in the Luminescence lab of Cologne University. Samples were classified into 7 sediment archives according to the field description and grain size analysis (fluvial, beach ridge, lacustrine, littoral sand, dune sand, basin silty sands, and mountain silt). The grain size statistics is presented in the .xlsx-table according to this classification. The combination of sedimentological, geomorphologic and geochronological observations led to a late Quaternary landscape reconstruction, including alluvial fan evolution, lake level history and aeolian dynamics in this arid region of the northern Gobi Desert. Category: geoscientificInformation Source: Not Available Supplemental Information: Not Availble Coverage: EVENT LABEL: * LATITUDE: 45.030000 * LONGITUDE: 100.730000 * METHOD/DEVICE: Multiple investigations
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Abstract: Threats to biodiversity pose an enormous challenge for Africa. Mounting social and economic demands on natural resources increasingly threaten key areas for conservation. Effective protection of sites of strategic conservation importance requires timely and highly detailed geospatial monitoring Larger ecological zones and wildlife corridors warrant monitoring as well, as these areas have an even higher degree of pressure and habitat loss. To address this, a satellite imagery based monitoring workflow to cover at-risk areas at various details was developed. During the program's first phase,a total of 560,442km2 area in Sub-Saharan Africa was covered, from which 153,665km2 were mapped with 8 land cover classes while 406,776km2 were mapped with up to 32 classes. Satellite imagery was used to generate dense time series data from which we derived thematic land cover maps. Each map and change map were fully verified and validated by an independent team to achieve our strict data quality requirements. The independent validation datasets for each KLCs are also described and presented here. Category: geoscientificInformation Source: Not Available Supplemental Information: Not Availble Coverage: EVENT LABEL: * LATITUDE: 7.200000 * LONGITUDE: 21.100000 * LOCATION: Africa * METHOD/DEVICE: Satellite derived
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Abstract: Not Available Category: geoscientificInformation Source: Not Available Supplemental Information: Not Availble Coverage: EVENT LABEL: * LATITUDE: 45.050000 * LONGITUDE: 100.510000 * METHOD/DEVICE: Multiple investigations
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Abstract: Not Available Category: geoscientificInformation Source: Not Available Supplemental Information: Not Availble Coverage: EVENT LABEL: * LATITUDE: 45.050000 * LONGITUDE: 100.510000 * METHOD/DEVICE: Multiple investigations
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  • Other
Abstract: The database consists of two shapefiles that show the locations of unmanned aerial vehicle (UAV) surveys and of ground-penetrating-radar analyses. The raw data of these surveys may be shared upon request and after publication. Additionally, one shapefile consisting of geomorphological alluvial fan mapping has been added. UAV surveys were conducted with the DJI Phantom 4 (12 MP sensor) and DJI Phantom 4 Advanced (20 MP sensor) drones to create high-resolution digital elevation models (DEMs). In the 'Drone_areas' shapefile, the column 'Name' refers to the survey name given in the field, and the column 'Reference' indicates the catchment referred to in van der Wal et al. (submitted to Geomorphology in 2019). The 'GPR_profiles' shapefile includes the locations of all GPR data collected in September 2017. All measurements were conducted using a SIR-3000 field computer and a 100 MHz GSSI radar antenna (model 3207A), with a survey wheel (model 620) to calibrate distance data. Dielectric permittivity values were set between 4 and 7. Van der Wal et al. (submitted to Geomorphology in 2019) includes GPR profiles 005, 003, 006 (G-1, G-2, G-3, respectively) and 064 (Hustiyn am). The 'AlluvialFanLevels' shapefile includes a geomorphological map of alluvial fans along the Ikh Bogd mountain front. The method for mapping is discussed in van der Wal et al. (submitted to Geomorphology in 2019). Some minor alluvial fan levels were excluded from publication (e.g. levels 1+ and 1t) because of their minor scale and lack of relevance in the discussed context. Category: geoscientificInformation Source: Not Available Supplemental Information: Not Availble Coverage: EVENT LABEL: * LATITUDE: 45.050000 * LONGITUDE: 100.510000 * METHOD/DEVICE: Multiple investigations
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