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  • Abstract: This dataset consists in 324 measurements of elemental (EC) and organic carbon (OC) concentrations in snow samples collected at 49 sites across the Svalbard archipelago, Norway, between 2007 and 2018. The samples were collected during a spatial survey in Svalbard conducted in April 2016, and as part of a program of surface snow monitoring on northeastern Spitsbergen carried out between 2007 and 2018. The EC and OC concentrations were measured by the thermo-optical transmittance method. Category: geoscientificInformation Source: Not Available Supplemental Information: Not Availble Coverage: Not Available
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  • Abstract: Not Available Category: geoscientificInformation Source: Not Available Supplemental Information: Not Availble Coverage: Not Available
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  • Abstract: This dataset contains the results of 19 individual (U-Th)/He analyses using Zircons extracted from bedrock samples. The bedrock samples were collected from medium-high grade metamorphic rocks exposed along the Budhi Gandaki and Trishuli river valleys. They were collected in order to add to the already available thermochronometric datasets and better constrain the exhumation history of the central Himalayas. The measurements of the ages follow the general procedures outlined in Reiners (2005) and Reiners et al. (2004). Category: geoscientificInformation Source: Not Available Supplemental Information: Not Availble Coverage: Not Available
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  • Abstract: The comparison between different climate model simulations of water hosing experiments under glacial conditions points toward diverging responses in Sea Surface Temperature changes (SST) especially in the Southeast Pacific (SEP). This suggests that reconstituting the latitudinal SST gradient in the SEP is a critical parameter for a better understanding of the mechanisms behind the abrupt climatic events since the last glacial period. Here we present, high-resolution records of SST, using planktonic foraminiferal assemblages and alkenone temperature reconstructions and stable oxygen and carbon isotopes from three deep-sea sediment cores along a latitudinal transect off the southern Chilean coast. This allowed us to reconstruct the variations of the latitudinal SST gradient and the Subtropical Front movements in the SEP. The SST results suggest a clear Antarctic timing consistent with the bipolar seesaw control, especially during the late glacial and the deglaciation. Our records do not suggest a complete oceanic heat transfer signal, highlighting the implication of an atmospheric component in the heat transfers between the two hemispheres, controlled by the latitudinal movements of the intertropical convergence zone in the Atlantic and the associated weaker South Pacific westerly split jet. Furthermore, our records indicate variable conditions during the Holocene, and also emphasize the influence of local fresh water inputs from the Patagonian ice sheet and/or precipitation on the SST fresh water input estimates along the Chilean margin (North and South of 49° S) from the onset of the deglaciation until 8 kyr cal. BP. Category: geoscientificInformation Source: Not Available Supplemental Information: Not Availble Coverage: Not Available
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  • Abstract: The 234Th-238U radioactive pair has been extensively used to evaluate the efficiency with which photosyntetically fixed carbon is exported from the surface ocean by means of the biological pump since the 90's. The seminal work of Buesseler et al. (1992) proposed that particulate organic carbon (POC) flux could be indirectly calculated from 234Th distributions if the ratio of POC to 234Th measured on sinking particles (POC:234Th) at the desired depth z was known. Since then, a huge amount of 234Th depth profiles have been collected using a variety of sampling instruments and strategies that have changed along years. This is a global oceanic database of 234Th measurements, that compiles results from innumerable researchers and laboratories over a period exceeding 50 years. The compilation is made of 220published datasets and 10 unpublished ones, including measurements from JGOFS, VERTIGO and GEOTRACES programs, with sampling from approximately 5000 locations spanning all the oceans. The compilation includes total 234Th profiles, dissolved and particulate 234Th concentrations, and POC:234Th ratios (both from pumps and sediment traps) for two sizes classes (1-53 um and < 53 um) when available. Appropriate metadata have been included, including geographic location, date, and sample depth, among others. When available, we include water temperature, salinity, bottom depth, 238U concentration measurements and particulate organic nitrogen (CHN) data. Data originator information (including total and particulate 234Th methodology if the same study had traps or particles collected some other way) are also included along with valuable information for future data analysis such as bloom stage and steady/non-steady state conditions at the sampling moment. This undertaking is a treasure of data to improve understand and quantify how the contemporary oceanic carbon uptake functions and how it will change in future. Category: geoscientificInformation Source: Not Available Supplemental Information: Not Availble Coverage: Not Available
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  • Abstract: Not Available Category: geoscientificInformation Source: Not Available Supplemental Information: Not Availble Coverage: EVENT LABEL: * LATITUDE: 46.916670 * LONGITUDE: 26.316670 * LOCATION: Romania * METHOD/DEVICE: Outcrop sample
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  • Abstract: This data set contains concentrations of major cations and anions in the pore fluid as well as boron stable isotopic ratios (d11B), stable oxygen and hydrogen isotopes of pore fluid (d18O and dD). Sediment samples were collected by using the seafloor drill rig MARUM-MeBo70 onboard 'RV MARIA S. MERIAN'. Category: geoscientificInformation Source: Not Available Supplemental Information: Not Availble Coverage: Not Available
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  • Abstract: Biogeochemical data of sediment core HH14-897-GC-MF taken from Hornsund Fjord, Svalbard, in October 2014. Included data-set: -Samples taken (depth) in core -Bulk radiocarbon data -Lipid concentrations n-alkanes, fatty acids, GDGTs, relative concentrations Homohopanes -Compound specific radiocarbon dating data -relative concentrations of intact polar lipids (two fractions: GL & PL) -calculated biomarker indices according Category: geoscientificInformation Source: Not Available Supplemental Information: Not Availble Coverage: Not Available
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  • Abstract: Here we present data of multiple types of fish debris in a composite record covering the last 25 kyr BP. The fish debris include fish scales, vertebrae and other bones. We also include 4 preservation indices, total organic carbon and carbonate fluxes. Category: geoscientificInformation Source: Not Available Supplemental Information: Not Availble Coverage: Not Available
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  • Abstract: Present dataset compiles all the vascular plant taxa existing in Sierra Nevada, together with relevant features including taxonomical, morphological-ecological traits, distribution, habitats, conservation status and abundance. Data were compiled according to all the available information sources on taxonomy, ecology and plant-species distribution. The resulting dataset includes 2,348 taxa belonging to 1,937 species, 377 subspecies and 34 hybrids, and with a total of 756 genera and 146 families represented in the collection. The data were compiled according to all the available information sources on taxonomy, ecology, and plant‐species distribution. The resulting data set includes 2,348 taxa belonging to 1,937 species, 377 subspecies and 34 hybrids, from a total of 756 genera and 146 families represented in the collection. For each taxa, together with taxonomical information (Phylum, Class, Family, Genus, Taxa), we compiled plant traits (life‐form, spinescence, flower symmetry, flower sexuality, plant gender, androecium:gynoecium ratio, flower color, perianth type, pollinator type, flowering, seed dispersal, vegetative reproduction), and their environmental association (origin, endemic character, general distribution, substrate, elevation, habitat, local abundance, hygrophilous behavior, conservation status). Category: geoscientificInformation Source: Not Available Supplemental Information: Not Availble Coverage: Not Available
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