cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.887804
title: Multiple batch experiments toto investigate Li and B partitioning and isotope fractionation between rock and water during serpentinization

description: Multiple batch experiments (100 °C, 200 °C; 40 MPa) were conducted, using Dickson-type reactors, to investigate Li and B partitioning and isotope fractionation between rock and water during serpentinization. We reacted fresh olivine (5 g; Fo90; [B] = &lt;0.02 µg/g; d11BOlivine -14 per mil; [Li] = 1.7 µg/g; d7LiOlivine = +5.3 per mil) with seawater-like fluids (75 ml, 3.2 wt.% NaCl) adjusted with respect to their Li (0.2, 0.5 µg/ml; and d7LiFluid +55 per mil) and B (~10 µg/ml and d11BFluid -0.3 per mil) characteristics. At 200 °C a reaction turnover of about 70% and a serpentinization mineral assemblage matching equilibrium thermodynamic computational results (EQ3/6) developed after 224 days runtime. Characterization of concomitant fluid samples indicated a distinct B incorporation into solid phases ([B]final_200 °C = 55.61 µg/g; DS/FB200 °C = 13.42) and a preferential uptake of the lighter 10B isotope (Delta11BS-F = -3.46 per mil). Despite a low reaction turnover at 100 °C (&lt;12%), considerable amounts of B were again incorporated into solid phases ([B]final_100 °C = 25.33 µg/g; DS/FB100 °C = 24.2) with even a larger isotope fractionation factor (Delta11BS-F = -9.97? per mil. While magnitude of isotope fraction appears anti-correlated with temperature, we argue for an overall attenuation of the isotopic effect through changes in B speciation in saline solutions (NaB(OH)4(aq) and B(OH)3Cl-) as well as variable B fixation and fractionation for different serpentinization product minerals (brucite, chrysotile). Breakdown of the Li-rich olivine and limited Li incorporation into product mineral phases resulted in an overall lower Li content of the final solid phase assemblage at 200 °C ([Li]final_200 °C = 0.77 µg/g; DS/FLi200 °C = 1.58). First order changes in Li isotopic compositions were defined by mixing of two isotopically distinct sources i.e. the fresh olivine and the fluid rather than by equilibrium isotope fraction. At 200 °C primary olivine is dissolved, releasing its Li budget into the fluid which shifts towards a lower d7LiF of +38.62 per mil. Newly formed serpentine minerals (d7LiS = +30.58 per mil) incorporate fluid derived Li with a minor preference of the 6Li isotope. At 100 °C Li enrichment of secondary phases exceeded Li release by olivine breakdown ([Li]final_100 °C = 2.10 µg/g; DS/FLi100 °C = 11.3) and it was accompanied by preferential incorporation of heavier 7Li isotope that might be due to incorporation of a 7Li enriched fluid fraction into chrysotile nanotubes.
description: Supplement to: Hansen, Christian T; Meixner, Anette; Kasemann, Simone A; Bach, Wolfgang (2017): New insight on Li and B isotope fractionation during serpentinization derived from batch reaction investigations. Geochimica et Cosmochimica Acta, 217, 51-79
DOI: 10.1594/pangaea.887917
title: Calcification, photophysiology and treatment parameters for laboratory experiment

description: Ocean acidification and coastal nutrient enrichment threaten the persistence of nearshore ecosystems, yet little is known about their combined effects on marine organisms. Here, we show that elevated nitrogen concentrations, in the forms of nitrite + nitrate and ammonium, offset the negative effects of near-future OA on calcification of the reef-building crustose coralline alga, Porolithon onkodes. Projected near-future pCO2 levels (~850 µatm) decreased P. onkodes calcification by 30% relative to ambient conditions. Conversely, nitrogen enrichment increased P. onkodes calcification by 90% and 130% in ambient and high pCO2 treatments, respectively, relative to ambient controls. pCO2 and nitrogen enrichment interactively affected instantaneous photophysiology. Relative electron transport rates (rETR) were highest in high pCO2 and high nitrogen conditions. Nitrogen enrichment alone increased concentrations of the photosynthetic pigments chlorophyll a, phycocyanin and phycoerythrin by ~80-450%, regardless of pCO2. These results demonstrate that nutrient enrichment can mediate organismal responses to OA, which has far-reaching implications for nearshore coral reefs that experience persistent or episodic nutrient enrichment via eutrophication or consumer excretions. Multi-stressor OA experiments increasingly are becoming important for improving our ability to predict the response of marine organisms and coral reefs to simultaneously occurring local and global change stressors.
DOI: 10.1594/pangaea.891277
title: CICE output from Navy Earth System Model (NESM) for 2018060512

description: INITIALIZATION: 2018060512FORECASTS:daily at 00Z out to 45 days (t1068)GRIDS:ARCu0.08 -- poleward of 40NANTu0.08 -- poleward of 49.52SPARAMETERS:hi:standard_name = "sea_ice_thickness" ;hs:standard_name = "surface_snow_thickness" ;Tsfc:standard_name = "surface_temperature_where_sea_ice" ;aice:standard_name = "sea_ice_area_fraction" ;uvel:standard_name = "eastward_sea_ice_velocity" ;vvel:standard_name = "northward_sea_ice_velocity" ;sst:standard_name = "sea_water_temperature" ;uocn:standard_name = "eastward_sea_water_velocity" ;vocn:standard_name = "northward_sea_water_velocity" ;Tair:standard_name = "air_temperature" ;strength:standard_name = "compressive_strength_of_sea_ice" ;
DOI: 10.1594/pangaea.892180
title: Mass, inverse of mass, uncertainty in inverse of mass, F14C value and uncertainty in F14C value of standard compounds used for 14C blank assessment in compound-specific radiocarbon analysis of lipid biomarkers and lignin phenols

description: Compound-specific radiocarbon dating often requires working with small samples of &lt; 100 µg carbon (µgC). This makes the radiocarbon dates of biomarker compounds very sensitive to biases caused by extraneous carbon of unknown composition, a procedural blank, which is introduced to the samples during the steps necessary to prepare a sample for radiocarbon analysis by accelerator mass spectrometry (i.e., isolating single compounds from a heterogeneous mixture, combustion, gas purification and graphitization). Reporting accurate radiocarbon dates thus requires a correction for the procedural blank. We present our approach to assess the fraction modern carbon (F14C) and the mass of the procedural blanks introduced during the preparation procedures of lipid biomarkers (i.e. n-alkanoic acids) and lignin phenols. We isolated differently sized aliquots (6-151 µgC) of n-alkanoic acids and lignin phenols obtained from standard materials with known F14C values. Each compound class was extracted from two standard materials (one fossil, one modern) and purified using the same procedures as for natural samples of unknown F14C. There was an inverse linear relationship between the measured F14C values of the processed aliquots and their mass, which suggests constant contamination during processing of individual samples. We used Bayesian methods to fit linear regression lines between F14C and 1/mass for the fossil and modern standards. The intersection points of these lines were used to infer F14Cblank and mblank and their associated uncertainties. We estimated 4.88±0.69 μgC of procedural blank with F14C of 0.714±0.077 for n-alkanoic acids, and 0.90±0.23 μgC of procedural blank with F14C of 0.813±0.155 for lignin phenols. These F14Cblank and mblank can be used to correct AMS results of lipid and lignin samples by isotopic mass balance. This method may serve as a standardized procedure for blank assessment in small-scale radiocarbon analysis.
DOI: 10.1594/pangaea.891036
title: Aufeis (naleds) of the North-East of Russia: GIS catalogue for the Indigirka River basin

description: The GIS database contains the data of aufeis (naleds) in the Indigirka River basin (Russia) from historical and nowadays sources, and complete ArcGIS 10.1/10.2 and Qgis 3* projects to view and analyze the data. All data and projects have WGS 1984 coordinate system (without projection). ArcGIS and Qgis projects contain two layers, such as Aufeis_kadastr (historical aufeis data collection, point objects) and Aufeis_Landsat (satellite-derived aufeis data collection, polygon objects).Historical data collection is created based on the Cadastre of aufeis (naleds) of the North-East of the USSR (1958). Each aufeis was digitized as point feature by the inventory map (scale 1:2 000 000), or by topographic maps. Attributive data was obtained from the Cadastre of aufeis. According to the historical data, there were 896 aufeis with a total area 2063.6 km² within the studied basin.Present-day aufeis dataset was created by Landsat-8 OLI images for the period 2013-2017. Each aufeis was delineated by satellite images as polygon. Cloud-free Landsat images are obtained immediately after snowmelt season (e.g. between May, 15 and June, 18), to detect the highest possible number of aufeis. Critical values of Normalized Difference Snow Index (NDSI) were used for semi-automated aufeis detection. However, a detailed expert-based verification was performed after automated procedure, to distinguish snow-covered areas from aufeis and cross-reference historical and satellite-based data collections. According to Landsat data, the number of aufeis reaches 1213, with their total area about 1287 km². The difference between the Cadastre (1958) and the satellite-derived data may indicate significant changes of aufeis formation environments.
description: Supplement to: Makarieva, Olga; Shikhov, Andrey; Nesterova, Nataliia; Ostashov, Andrey (2019): Historical and recent aufeis in the Indigirka River basin (Russia). Earth System Science Data, 11(1), 409-420
DOI: 10.1594/pangaea.893384
title: CICE output from Navy Earth System Model (NESM) for 2018030312

description: INITIALIZATION: 2018030312FORECASTS:daily at 00Z out to 45 days (t1068)GRIDS:ARCu0.08 -- poleward of 40NANTu0.08 -- poleward of 49.52SPARAMETERS:hi:standard_name = "sea_ice_thickness" ;hs:standard_name = "surface_snow_thickness" ;Tsfc:standard_name = "surface_temperature_where_sea_ice" ;aice:standard_name = "sea_ice_area_fraction" ;uvel:standard_name = "eastward_sea_ice_velocity" ;vvel:standard_name = "northward_sea_ice_velocity" ;sst:standard_name = "sea_water_temperature" ;uocn:standard_name = "eastward_sea_water_velocity" ;vocn:standard_name = "northward_sea_water_velocity" ;Tair:standard_name = "air_temperature" ;strength:standard_name = "compressive_strength_of_sea_ice" ;
DOI: 10.1594/pangaea.893385
title: CICE output from Navy Earth System Model (NESM) for 2018030412

description: INITIALIZATION: 2018030412FORECASTS:daily at 00Z out to 45 days (t1068)GRIDS:ARCu0.08 -- poleward of 40NANTu0.08 -- poleward of 49.52SPARAMETERS:hi:standard_name = "sea_ice_thickness" ;hs:standard_name = "surface_snow_thickness" ;Tsfc:standard_name = "surface_temperature_where_sea_ice" ;aice:standard_name = "sea_ice_area_fraction" ;uvel:standard_name = "eastward_sea_ice_velocity" ;vvel:standard_name = "northward_sea_ice_velocity" ;sst:standard_name = "sea_water_temperature" ;uocn:standard_name = "eastward_sea_water_velocity" ;vocn:standard_name = "northward_sea_water_velocity" ;Tair:standard_name = "air_temperature" ;strength:standard_name = "compressive_strength_of_sea_ice" ;
DOI: 10.1594/pangaea.893387
title: CICE output from Navy Earth System Model (NESM) for 2018030612

description: INITIALIZATION: 2018030612FORECASTS:daily at 00Z out to 45 days (t1068)GRIDS:ARCu0.08 -- poleward of 40NANTu0.08 -- poleward of 49.52SPARAMETERS:hi:standard_name = "sea_ice_thickness" ;hs:standard_name = "surface_snow_thickness" ;Tsfc:standard_name = "surface_temperature_where_sea_ice" ;aice:standard_name = "sea_ice_area_fraction" ;uvel:standard_name = "eastward_sea_ice_velocity" ;vvel:standard_name = "northward_sea_ice_velocity" ;sst:standard_name = "sea_water_temperature" ;uocn:standard_name = "eastward_sea_water_velocity" ;vocn:standard_name = "northward_sea_water_velocity" ;Tair:standard_name = "air_temperature" ;strength:standard_name = "compressive_strength_of_sea_ice" ;
DOI: 10.1594/pangaea.887995
title: NanoSIMS data, 13C assimilation in the symbiotic dinoflagellates and their foraminiferal host (Orbulina universa)

description: Here we performed pulse-chase experiments with 13C-enriched dissolved inorganic carbon, followed by TEM and quantitative NanoSIMS isotopic imaging to visualize photosynthetic C assimilation by individual symbiotic dinoflagellates and subsequent translocation to their Orbulina universa host.NanoSIMS image processing was carried out as described in LeKieffre et al. (2017) and Nomaki et al. (2018). Briefly, TEM images were aligned with corresponding NanoSIMS 12C14N- images (Online Resource 1) using the software Look@NanoSIMS (Polerecky et al. 2012), which allows a user to hand-draw regions of interest (ROIs) corresponding to different organelles (e.g., dinoflagellate starch grains, foraminiferal lipid droplets, and fibrillar bodies). For each type of organelle and each time point, the average 13C-enrichment and its standard deviation were calculated based on 3 replicate foraminifera (except for the 6 h and 30 h time points, where only 2 replicates were available). The ROIs drawn on TEM images were also used to assess the relative abundance (in %) of lipid droplets in the foraminiferal endoplasm and starch grains in the dinoflagellate cytoplasm, respectively. Lipid droplet abundance was determined as the number of pixels occupied by lipid droplets divided by the total number of pixels of foraminiferal endoplasm. Starch grain abundance was determined as the number of pixels of occupied by starch grains divided by the total number of pixels covering dinoflagellate cytoplasm.
description: Supplement to: LeKieffre, Charlotte; Spero, Howard J; Russell, Ann D; Fehrenbacher, Jennifer; Geslin, Emmanuelle; Meibom, Anders (2018): Assimilation, translocation, and utilization of carbon between photosynthetic symbiotic dinoflagellates and their planktic foraminifera host. Marine Biology, 165(6)
DOI: 10.1594/pangaea.884609
title: Results from confusion matrices of supervised classification of habitat at 12 American kestrel nest sites in Massachusetts

description: These data are the overall accuracies and kappa coefficients of several different supervised classification operations using program ENVI to identify areas of Grass, Herbaceous growth, Woody growth, Bare Ground, and Human-modified habitat in UAV aerial photos taken around 12 American Kestrel nest box sites located around Massachusetts, USA. Sites are numbered 1-12. "Self.Acc" or "Self.Kap" indicate overall accuracy or kappa coefficients when the classifier was trained with image data from the site itself. "4.Kap" or "9.Acc" indicate results when the classifier was trained with image data from Site 4 or Site 9, rather than the site itself. The "Kernels" tabs contain results using Classification Aggregation with a minimum kernel size, in pixels, indicated by the column titles, ex: "768.Kap" is the kappa coefficient when the minimum kernel size in ENVI Classification Aggregation was set to 768 pixels.
DOI: 10.1594/pangaea.890905
title: Major element composition of the atmospheric mineral dust extracted from the Talos Dome ice core sections

description: The age of the samples ranges between 1.9 Kyr BP and 32.9 Kyr BP (AICC2012 chronology). The following time periods are highlighted: Holocene (from present to 11.7 Kyr BP), the last deglaciation (from 11.7 to 18 Kyr BP) and the last glacial maximum (from 18 to 32 Kyr BP).
DOI: 10.1594/pangaea.887843
title: Geological mapping of Ebbe-Sattel, Sauerland, Germany (Appendix)

description: Ergebnisse: Durch konsequente Verfolgung der Tephrostratigraphie ergibt sich ein klareres Bild des neubearbeiteten Ausschnittes des Ebbe-Sattels.- Verseschichten kommen im kartierten Gebiet nicht vor.- Es ließen sich keine Winkeldiskordanzen oder Sedimentationslücken feststellen.- Im Hangenden der Bunten Ebbe-Gruppe kann entweder der Fahlenscheid-Vulkanit oder der Rehberg-Horizont kartiert werden, was ein Beweis für die Zeitgleichheit von beiden ist.- Der Haupt-Vulkanit ist zu Teilen mit Sicherheit subaerisch abgelagert worden: Die Felsokeratophyre und manche Tuffe zeigen ignimbritische Strukturen und im obersten Teil des Vulkanits finden sich "accretionary lapilli".- Die Haupt-Sattelachse des kartierten Sattels liegt nördlicher als FUCHS angenommen hat, nämlich zwischen Hüttebruch und Vor der Mark.- Die Auswertung der tektonischen Daten gibt keine Hinweise für mehrere tektonische Phasen. Es wird deshalb ein einphasiger Beanspruchungsplan vermutet.
description: Supplement to: Pätzold, Jürgen (1981): Stratigraphie und Tektonik des Unter-Devon im Ebbe-Sattel auf Teilen des Blattes 4811 Meinerzhagen, Sauerland (Rheinisches Schiefergebirge). Diploma thesis, Fachbereich Mathematik-Naturwissenschaften der Christian-Albrechts-Universität Kiel (pdf 35 MB), 77 pp
DOI: 10.1594/pangaea.888414
title: Spring and control data and associated images for a coastal lagoon of Tahiti, French Polynesia
DOI: 10.1594/pangaea.787462
title: (Table T6) Major element oxides and cations of mica from ODP Hole 176-735B veins

description: Number of ions is calculated on the basis of 22 oxygen (and OH) atoms.
DOI: 10.1594/pangaea.883585
title: Agricultural nitrogen fertilizer uses in the continental U.S. during 1850-2015: a set of gridded time-series data

description: To facilitate earth system modeling and inventory-based studies, we developed a spatially explicit time-series data set of nitrogen (N) fertilizer use in agricultural land of the continental U.S. during 1850 to 2015. The spatial resolution of this data set is 5km × 5km, and the time step is annually. Through gap-filling, we reconstructed the state-level crop-specific N fertilizer use history by harmonizing national and state-level N fertilizer use data from multiple data sources. We then spatialized and resampled N fertilizer use data to 5km × 5km gridded maps based on historical land cover data of the continental U.S. developed by Yu and Lu (2017). This data indicated that N fertilizer use rates of the U.S. increased by 34 times from 1940 to 2015. Geospatial analysis revealed that the hotspots of N fertilizer use have shifted from the southeastern and eastern US to the Midwest and the Great Plains during the past century.
description: Supplement to: Cao, Peiyu; Lu, Chaoqun; Yu, Zhen (2018): Historical nitrogen fertilizer use in agricultural ecosystems of the contiguous United States during 1850–2015: application rate, timing, and fertilizer types. Earth System Science Data, 10(2), 969-984
DOI: 10.1594/pangaea.494629
title: Physical oceanography during cruise F58SDX9503C
DOI: 10.1594/pangaea.888597
title: Surface elevation (2012) and elevation changes (2000-2012) of Jammu and Kashmir (Karakoram-Himalaya) glaciers

description: Although a number of studies indicate the regional heterogeneity of the glacier elevation and mass changes in high-mountain Asia in the early 21st century, little is known about these changes with high spatial detail for some of the regions. In this study we present respective glacier elevation and mass change estimates in the Indian state of Jammu and Kashmir (JK) for the period 2000–2012. Our estimates are based on the interferometric analysis of SRTM DEM and the bistatic TanDEM-X data. On an average the JK East (Karakoram) glaciers showed less negative elevation changes (− 0.19 ± 0.22 m/ yr) compared to the JK West (Himalaya) glaciers (− 0.50 ± 0.28m/yr). This agrees very well with previous studies that show a transition from larger changes in the western Himalaya to a steady-state situation in the Karakoram. We observe distinct elevation change patterns on a glacier scale that is most likely linked to debris insulation and the enhanced ice melting due to supraglacial lakes, ponds and ice cliffs. We also found 16 surge-type glaciers in the JK East which were not documented before. In total, 25 glaciers surged and 4 others appeared to be in a quiescent phase in the observation period. Our results also reveal that the glacier-averaged elevation change rates of surge-type and non surge-type glaciers in the JK East region are not significantly different.
description: This dataset contain elevation and elevation change of glaciers in Jammu and Kashmir West (western Himalaya), and Jammu and Kashmir East (Karakoram). The bi-static TanDEM-X (TerraSAR-X add-on for Digital Elevation Measurement) data of 2012 was processed to measure surface elevation of glaciers. Elevations from Shuttle Radar Topography Mission of 2000 and TanDEM-X of 2012 were used to compute glacier surface elevation change during 2000-2012
description: Supplement to: Vijay, Saurabh; Braun, Matthias Holger (2018): Early 21st century spatially detailed elevation changes of Jammu and Kashmir glaciers (Karakoram–Himalaya). Global and Planetary Change, 165, 137-146
DOI: 10.1594/pangaea.847807
title: (Table 2) Major element concentration in sediment cores sampled around the Windmill Islands in 1998

description: All data in wt%.
DOI: 10.1594/pangaea.889033
title: Model predictions, evaluation scores and spatial conservation plans for the terrestrial, marine and freshwater realm

description: Each .zip file contains: - the model predictions for spatial and non-spatial SDMs (non-spatial=zib, spatial=zib_icar) for each realm in a .RData object. This is a shapefile where each column in the attribute table holds the semi-binary model predictions (zero below TSS threshold, original probabalistic value above the threshold). - model evaluation scores for each species (see species_sequence.txt) - the spatial conservation plan for each %-target (10-90%), using spatial and non-spatial SDMs. Each run (e.g., 10%) comes in a .Rdata object and holds a data.frame that can be linked to the shapefile (see above) using the ID-column All data comes in the WGS84 projection and can be open with the freeware "R". The Gurobi-files can be directly merged to the spatial shapefiles which are stored in the RData object.
description: Supplement to: Domisch, Sami; Friedrichs, Martin; Hein, Thomas; Borgwardt, Florian; Wetzig, Annett; Jähnig, Sonja C; Langhans, Simone D (2019): Spatially explicit species distribution models: A missed opportunity in conservation planning? Diversity and Distributions, 25(5), 758-769
DOI: 10.1594/pangaea.884660
title: Confusion matrices evaluating the accuracy of supervised classification of habitat types in UAV aerial photos around American kestrel nest sites in Massachusetts, USA

description: Confusion matrices generated by program ENVI to evaluate the accuracy of Supervised Classification via a Maximum Likelihood method. Each of 12 sites was photographed at 25m and 50m heights by a Phantom 2 Vision+ quadcopter drone. Each 50m photo was also cropped to the same field of view as the 25m photo in order to examine effects of changes in image resolution with altitude. At 25m and 50m heights, different final image resolutions (kernel sizes, in pixels) were also recorded to compare. Each image was classified into a maximum of five different cover types, and the number of pixels correctly and incorrectly assigned to each cover category is recorded in the confusion matrix.
DOI: 10.1594/pangaea.888096
title: Xray-ct-scanner images from IODP Hole 370-C0023A
DOI: 10.1594/pangaea.695087
title: Ciliate abundance in water samples collected at Station MAY-1997-IR09 in the Aegean Sea

description: For sample preservation borax-buffered formalin (final concentration 2% formaldehyde) has been used. Samples were stored at 4°C in the dark until observation. 100 ml samples have been transferred into Utermohl chambers for settling during 24 hours and finally examined by means of an inverted microscope.
DOI: 10.1594/pangaea.817378
title: (Table 4) Major element compositions of clinopyroxenes at DSDP Hole 67-494A
DOI: 10.1594/pangaea.748262
title: Hydrography on standard level calculated from water bottle samples of RV Slava from 1951 to 1959
DOI: 10.1594/pangaea.665134
title: Oceanography at CTD/bottle station IFREMER_1974