cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.917711
title: Stable isotope (δ¹⁸O, δ²H and d) values, standard deviations, slopes and intercepts for all sampled Holocene and modern ice‐wedges and recent precipitation samples at the Eastern Chukotka Sites

description: Stable isotope ratios (δ¹⁸O and δ²H) were analyzed at the stable isotope laboratory of the Faculty of Geography in the Lomonosov Moscow State University (headed by Prof. Yu. Vasil'chuk) using a Finnigan Delta‐V Plus mass spectrometer applying equilibration techniques. The values are presented in δ‐notation in per mil (‰) relative to the Vienna Standard Mean Ocean Water (VSMOW) expressed in per mil (‰). Analytical precision was ±0.1‰ for δ¹⁸O and ±0.8‰ for δ²H. Oxygen isotope measurements of wedge ice sampled in 1987 were carried out in the isotope laboratory of the Institute of Geology of Estonia (headed by Prof. R. Vaikmäe) using a Finnigan Delta‐E mass spectrometer. Analytical precision was ±0.4‰.
DOI: 10.1594/pangaea.915022
title: δ¹⁸O, δ²H, deuterium excess and protease activity of Mikhail hill, vicinity of Anadyr Town, Chukchi Peninsula

description: δ¹⁸O, δ²H, deuterium excess (dexc), and protease activity (PA) in snowpacks at different elevations of Mikhail hill, vicinity of Anadyr Town, Chukchi Peninsula
DOI: 10.1594/pangaea.917709
title: Air temperature data from weather stations in Eastern Chukotka (for 1965–2015)
DOI: 10.1594/pangaea.914727
title: Spore and pollen from outcrop samples of the Plakhinskii Yar site (Kolyma River)
DOI: 10.1594/pangaea.945881
title: Compilation of fatty acid composition of marine biota from the central and Northeast Atlantic, and the Mediterranean Sea

description: Fatty acid (FA) composition has increasingly been used to estimate the dietary preference of marine organisms. Specific fatty acids and fatty acid ratios serve as trophic markers (FATM) and have the potential to provide insights on the long-term dietary preference of organisms. FATM have been applied for this purpose on various zooplankton, fish and up to whales. We aim to build up a database of new and published data on fatty acid content of mesopelagic fish and their predators from the central and Northeast Atlantic, and the Mediterranean Sea, to use in FATM food web studies, investigating the importance of mesopelagic organisms as predators and prey in the marine ecosystem. Here we compiled FA content (i.e., the proportion of each FA measured in sampled tissues or in the whole body of organisms in relation to total FAs analysed) of 36 fish species or genera, 15 seabirds, five marine mammals, two cephalopods, one turtle, one jelly fish, and one shark. For each record, we included all FAs with values above 0.1% of total FAs and report the percentage values as provided in the original data source. Each data record is associated with information on the sampling location, geographic coordinates, month and year of sample collection, method of sample collection, taxonomic ranks (phylum, class, order, family), number and size (or size range) of sampled organisms, as well as the reference and DOI of the original data source, for further details on the samples analysed and/or the analytical techniques used.
DOI: 10.1594/pangaea.915014
title: δ¹⁸O variations in ice wedge and pore ice from Ledovy Obryv and Ust'-Algan outcrops in Mayn River Valley
DOI: 10.1594/pangaea.917710
title: Radiocarbon ages of peat and wood from the sediment adjacent to the ice‐wedges, Eastern Chukotka sites

description: 14C ages of bulk samples were obtained at the Institute of Geology RAS (lab code GIN) and in the Institute for the History of Material Culture, St. Petersburg (lab code Le). Calibrated ages were determined as yr b2k (before 2000 CE) using Oxcal 4.2 based on the IntCal13 dataset after Bronk (2009) and Reimer et al. (2013).
DOI: 10.1594/pangaea.946139
title: Compilation of stomach content data for mesopelagic fish and predator species from the central and Northeast Atlantic, and the Mediterranean Sea

description: Stomach contents analysis is a standard dietary assessment method that potentially enables quantifying diet components with high taxonomic resolution. We compiled diet compositions from stomach content analysis from 75 unique species or genera: 32 fish, 19 marine mammals, 14 elasmobranchs, 9 seabirds and one marine turtle. Data were gathered from 89 published sources that included samples collected between 1885 and 2016 throughout the central and Northeast Atlantic, and the Mediterranean Sea. When available, we reported the percentage number of individuals of a prey type as a proportion of the total number of prey items (%N), the proportion of a prey item by weight (%W), and the proportion of stomachs containing a particular prey item (i.e. percent frequency of occurrence, %F). For each data record, we also provided the sampling location, geographic coordinates, month and year of sample collection, method of sample collection, taxonomic ranks (phylum, class, order, family), number and size (or size range) of sampled organisms, as well as the reference and DOI of the original data source, for further details on the samples analysed and/or the analytical techniques used.
DOI: 10.15468/dl.pnv93a
title: Occurrence Download

description: A dataset containing 4498 species occurrences available in GBIF matching the query:
{
 "DatasetKey" : [
 "is Flora of Japan Specimen Database"
 ]
}

 The dataset includes 4498 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0005381-241007104925546/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.1594/pangaea.943406
title: Alkenone concentration in surface sediments
DOI: 10.1594/pangaea.917712
title: δ¹⁸O values for Holocene and modern ice‐wedges at Sites 2 and 3

description: Stable isotope ratios (δ¹⁸O and δ²H) were analyzed at the stable isotope laboratory of the Faculty of Geography in the Lomonosov Moscow State University (headed by Prof. Yu. Vasil'chuk) using a Finnigan Delta‐V Plus mass spectrometer applying equilibration techniques. The values are presented in δ‐notation in per mil (‰) relative to the Vienna Standard Mean Ocean Water (VSMOW) expressed in per mil (‰). Analytical precision was ±0.1‰ for δ¹⁸O and±0.8‰ for δ²H. Oxygen isotope measurements of wedge ice sampled in 1987 were carried out in the isotope laboratory of the Institute of Geology of Estonia (headed by Prof. R. Vaikmäe) using a Finnigan Delta‐E mass spectrometer. Analytical precision was ±0.4‰.
DOI: 10.1594/pangaea.921634
title: Radiocarbon dates on buried tree from debris-avalanche deposit in northern Yatsugatake volcanoes

description: Here we present radiocarbon dates of tree-ring collected from debris-avalanche deposit along the Ohtsuki River in northern Yatsugatake volcanoes, central Japan. The tree sample was collected in the eastern part of Lake Matsubara (N36.052837, E138.456496), central Japan.--The tree trunk used in this study was deeply excavated from the debris deposit during land reclamation works which were conducted from 1980s to 1990s. The analytical tree samples for radiocarbon analyses were collected from the tree trunk in 1999.
DOI: 10.1594/pangaea.919178
title: Radiocarbon dates of peat in palsa near Bugry Station

description: Radiocarbon dates of peat in palsa near Bugry Station, North-eastern part of European Russia, Usa River valley.The radiocarbon dates were obtained in the Radiocarbon Laboratory of the Geological Institute (GIN) of the Russian Academy of Sciences (Head L. Sulerzhitsky).
DOI: 10.1594/pangaea.855431
title: (Table S3) Compilation of D14C source data from the literature and this study for the Holocene soil end - member

description: Sampling depth is given in meters below surface (m b.s.), except for values from Bolshiyanov et al. (2015) where height is given in meters above water level.
DOI: 10.1594/pangaea.914743
title: Mean January air paleotemperatures and present values from different sites in lower Kolyma area
DOI: 10.1594/pangaea.926677
title: Compiled reservoir ages from sediment cores from the Iberian Margin
DOI: 10.1594/pangaea.926678
title: Compiled reservoir ages from sediment cores from the Southern Ocean
DOI: 10.1594/pangaea.912090
title: Radiocarbon dates of sediment core MD04-2829
DOI: 10.1594/pangaea.926620
title: Compiled splined radiocarbon reservoir ages from the Northeast Atlantic
DOI: 10.1594/pangaea.915025
title: δ²H in ice wedge, sand wedge, massive and pore ice at Rogozhny Cape, northern coast of Onemen Gulf

description: δ²H in ice wedge (IW), sand wedge (SIW), massive (MI) and pore (PI) ice at Rogozhny Cape, northern coast of Onemen Gulf, 25 km from Anadyr Town.
DOI: 10.1594/pangaea.926712
title: Radiocarbon dates and reservoir ages of sediment core DAPC2
DOI: 10.1594/pangaea.921024
title: Dansgaard-Oeschger Events on Isotope Plots of Siberian Ice Wedges

description: Hydrogen and oxygen isotope records with a resolution of 100-200 years were obtained from ice-wedge ice at four locations in Siberia, Micro-organic inclusions and pollen concentrates from ice wedges allowed precise AMS radiocarbon dating of the isotope records and comparison with G1SP2 and GRIP ice cores. Separate Dansgaard-Oeschger events are distinguished within the ice-wedge ice and correlated with the Greenland ice cores.
description: Direct AMS radiocarbon dates of organic micro inclusions from Siberian ice wedges.The AMS radiocarbon dating was carried out at Groningen University (Head Prof. J. van der Plicht, lab code GRA) and Seoul National University (Head Prof. J.-Ch.Kim, lab code SNU).Data was submitted and proofread by Yurij K Vasil'chuk and Lyubov Bludushkina at the faculty of Geography, department of Geochemistry of Landscapes and Geography of Soils, Lomonosov Moscow State University.
DOI: 10.1594/pangaea.935284
title: A twenty-year record of carbon isotope values of amino acids from Potamocorbula amurensis

description: Amino acids were isolated from the muscle tissue of Potamocorbula amurensis, an invasive clam species, collected from two locations in the northern portion of the San Francisco Bay. Clam specimens were collected biannually in 1997, 2002, and from 2009-2017 at both locations. The carbon isotope values of individual amino acids were measured.Clam specimens were collected at USGS Sites 4.1 (Suisun Bay) and 8.1 (Carquinez Strait) in the San Francisco Bay and processed as described in Stewart et al. (2013; doi:10.3354/meps10503). Amino acids were hydrolyzed from P. amurensis, derivatized, isolated and the carbon isotope values were measured following Vokhshoori et al. (2013; doi:10.3354/meps10746).The purpose of this study was to assess long-term changes in dietary sources and/or changes in the baseline carbon isotope value of the estuary's food-web following the invasion of P. amurensis.
DOI: 10.1594/pangaea.935285
title: A two-decade timeseries of baseline nutrient variations in the San Francisco Bay as recorded in nitrogen isotope values of amino acids from benthic filter-feeders

description: Amino acids were isolated from the muscle tissue of Potamocorbula amurensis, an invasive clam species, collected from two locations in the northern portion of the San Francisco Bay. Clam specimens were collected biannually in 1997, 2002, and from 2009-2017 at both locations. The nitrogen isotope values of individual amino acids were measured. Clam specimens were collected at USGS Sites 4.1 (Suisun Bay) and 8.1 (Carquinez Strait) in the San Francisco Bay and processed as described in Stewart et al. (2013; doi:10.3354/meps10503). Amino acids were hydrolyzed from P. amurensis, derivatized, and isolated following Vokhshoori et al. (2013; doi:10.3354/meps10746). Nitrogen isotope values of individual amino acids were measured following Vokhshoori and McCarthy, 2013 (doi:10.1371/journal.pone.0098087).The purpose of this study was to isolate variations in nutrient baseline over the twenty-year period following the arrival of invasive P. amurensis.
DOI: 10.1594/pangaea.926604
title: Radiocarbon age pins and reservoir ages of sediment core MD04-2829
DOI: 10.1594/pangaea.918565
title: Mean January paleotemperatures in northwestern Yakutia from 42 to 47 cal ka BP

description: Mean January (tJ) paleotemperatures in northwestern Yakutia from 42 to 47 cal ka BP reconstructed from the oxygen isotope composition (δ¹⁸ОIW) of ice wedges.Stable isotope analyses were made at the isotope laboratory of the Geographical Department of Moscow University on a Finnigan Delta-V mass spectrometer with the standard gas-bench option (Prof. Yu. Vasil'chuk and Dr. N.Budantseva). The δ¹⁸О and δ²H values were expressed per mill (‰) as the deviation of the respective isotope ratios of the measured samples from the Vienna standard mean ocean water VSMOW (δ¹⁸О = 0 ‰, δ²H = 0 ‰) and Greenland Ice Sheet Precipitation GISP (δ¹⁸О = –24.76 ‰, δ²H = –189.5 ‰), as well as IAEA laboratory standards (IAEA 12, δ¹⁸О = –12.10 ‰, δ²H = –85.9 ‰; IAEA 13, δ¹⁸О = –33.35 ‰, δ²H = –257.2 ‰) and the domestic Moscow University standard of fresh snow from the Garabashi glacier in the Cuacasus (δ¹⁸О = –15.60 ‰, δ²H = –110.0 ‰). The precision of the measurements was 0.1 ‰ for δ¹⁸О and 0.6 ‰ for δ²H.The dating was carried out at the Laboratory of Radiocarbon Dating and Electronic Microscopy, Institute of Geography, Russian Academy of Sciences, Moscow, Russia, and the Center for Applied Isotope Studies, University of Georgia, United States (direct measurements with an acceleration mass spectrometer). Radiocarbon ages were calibrated using OxCal 4.3.2 using CALIB 7.1 program with the IntCal13 calibration curve (Stuiver et al., 2019; Reimer et al., 2013). The Late Pleistocene mean January air temperatures in northwestern Yakutia from 42 to 49 cal ka BP were computed using the formula from (Vasil'chuk, 1991) for a number of reference sections located 300-500 km north of the Batagay Yedoma.
DOI: 10.1594/pangaea.922061
title: Content of water-soluble salts in sediments from the outcrop of the Ery-Maretayakha river (Oblogov, 2016)

description: Data was compiled from G.E. Oblogov, 2016.
DOI: 10.1594/pangaea.914249
title: δ¹⁸O variations in Late Pleistocene and Holocene ice wedges and in growing present ice wedges from outcrop samples of Plakhinskii Yar site (Kolyma River)
DOI: 10.1594/pangaea.961141
title: Plant macrofossil counts of peat core from Beerberg peatland (Central Germany)
DOI: 10.1594/pangaea.961121
title: Age-depth model of peat core from Beerberg peatland (Central Germany)
DOI: 10.1594/pangaea.921254
title: Radiocarbon ages of sediment core GeoB16204-2
DOI: 10.1594/pangaea.961140
title: Pollen counts of peat core from Beerberg peatland (Central Germany)
DOI: 10.1594/pangaea.913453
title: Photochemical characteristics of dissolved organic matter in precipitation from Seoul, South Korea

description: Precipitation is a component of the global carbon cycle through which organic carbon enters terrestrial and aquatic ecosystems from the atmosphere. We measured photochemical characteristics of dissolved organic matter in precipitation from Dec. 30, 2015 to Feb. 21, 2017 in Seoul, South Korea.
DOI: 10.1594/pangaea.961124
title: Carbon and nitrogen concentrations and their stable isotope values of peat core from Beerberg peatland (central Germany)
DOI: 10.1594/pangaea.913446
title: Key characteristics of organic carbon in precipitation in Seoul, South Korea

description: Precipitation is a component of the global carbon cycle through which organic carbon enters terrestrial and aquatic ecosystems from the atmosphere. We measured Δ14C-DOC (dissolved organic carbon) and Δ14C-POC (particulate organic carbon) in bulk precipitation from Dec. 30, 2015 to Feb. 21, 2017 in Seoul, South Korea.
DOI: 10.1594/pangaea.919180
title: Radiocarbon dates of peat in palsa near Abez Settlement

description: Radiocarbon dates of peat in palsa near Abez' Settlement, North-eastern part of European Russia, Usa River valley.The radiocarbon dates were obtained in the Radiocarbon Laboratory of the Geological Institute (GIN) of the Russian Academy of Sciences (Head L.Sulerzhitsky).
DOI: 10.1594/pangaea.905942
title: Radiocarbon data from ODP site 172-1062
DOI: 10.1594/pangaea.905941
title: Radiocarbon data from ODP site 172-1060
DOI: 10.1594/pangaea.906001
title: Radiocarbon dating of stalagmite M1-5 from Moomi Cave, Socotra Island

description: In this study, the dead carbon fraction (DCF) variations in stalagmite M1-5 from Socotra Island in the western Arabian Sea were investigated through a new set of high-precision U-series and radiocarbon (14C) dates. The data reveal an extreme case of very high and also climate dependent DCF values. For M1-5 an average DCF of 56.2 ± 3.4 % is observed between 27 and 18 kyr BP. Such high DCF values indicate a high influence of aged soil organic matter (SOM) and nearly completely closed system carbonate dissolution conditions. Towards the end of the last glacial period decreasing Mg/Ca ratios suggest an increase in precipitation which caused a marked change in the soil carbon cycling as indicated by sharply decreasing DCF. This is in contrast to the relation of soil infiltration and reservoir age observed in stalagmites from temperate zones. For Socotra Island, which is influenced by the East African-Indian monsoon, we propose that more humid conditions and enhanced net-infiltration after the LGM led to denser vegetation and thus lowered the DCF by increased 14CO2 input into the soil zone. The onset of the Younger Dryas (YD) is represented in the record by the end of DCF decrease with a sudden change to much higher and extremely variable reservoir ages. Our study highlights the dramatic variability of soil carbon cycling processes and vegetation feedback on Socotra Island manifested in stalagmite reservoir ages on both long-term trends and sub-centennial timescales, thus providing evidence for climate influence on stalagmite radiocarbon. This is of particular importance for studies focussing on 14C calibration and atmospheric reconstruction through stalagmites which relies on largely climate independent soil carbon cycling above the cave.
DOI: 10.1594/pangaea.906002
title: Uranium and Thorium in stalagmite M1-5 from Moomi Cave, Socotra Island

description: In this study, the dead carbon fraction (DCF) variations in stalagmite M1-5 from Socotra Island in the western Arabian Sea were investigated through a new set of high-precision U-series and radiocarbon (14C) dates. The data reveal an extreme case of very high and also climate dependent DCF values. For M1-5 an average DCF of 56.2 ± 3.4 % is observed between 27 and 18 kyr BP. Such high DCF values indicate a high influence of aged soil organic matter (SOM) and nearly completely closed system carbonate dissolution conditions. Towards the end of the last glacial period decreasing Mg/Ca ratios suggest an increase in precipitation which caused a marked change in the soil carbon cycling as indicated by sharply decreasing DCF. This is in contrast to the relation of soil infiltration and reservoir age observed in stalagmites from temperate zones. For Socotra Island, which is influenced by the East African-Indian monsoon, we propose that more humid conditions and enhanced net-infiltration after the LGM led to denser vegetation and thus lowered the DCF by increased 14CO2 input into the soil zone. The onset of the Younger Dryas (YD) is represented in the record by the end of DCF decrease with a sudden change to much higher and extremely variable reservoir ages. Our study highlights the dramatic variability of soil carbon cycling processes and vegetation feedback on Socotra Island manifested in stalagmite reservoir ages on both long-term trends and sub-centennial timescales, thus providing evidence for climate influence on stalagmite radiocarbon. This is of particular importance for studies focussing on 14C calibration and atmospheric reconstruction through stalagmites which relies on largely climate independent soil carbon cycling above the cave.
DOI: 10.1594/pangaea.912939
title: Standard material radiocarbon measurements and standard deviation of the replicated radiocarbon measurements of sediment core SU90-08
DOI: 10.1594/pangaea.775379
title: Numerical modeling of marine radiocarbon reservoir ages during the last deglaciation

description: A critical problem in radiocarbon dating is the spatial and temporal variability of marine reservoir ages (MRAs). We assessed the MRA evolution during the last deglaciation by numerical modeling, applying a self-consistent iteration scheme in which an existing radiocarbon chronology (derived by Hughen et al., Quat. Sci. Rev., 25, pp. 3216-3227, 2006) was readjusted by transient, 3-D simulations of marine and atmospheric Delta14C. To estimate the uncertainties regarding the ocean ventilation during the last deglaciation, we considered various ocean overturning scenarios which are based on different climatic background states (PD: modern climate, GS: LGM climate conditions). Minimum and maximum MRAs are included in file 'MRAminmax_21-14kaBP.nc'. Three further files include MRAs according to equilibrium simulations of the preindustrial ocean (file 'C14age_preindustrial.nc'; this is an update of our results published in 2005) and of the glacial ocean (files 'C14age_spinupLGM_GS.nc' and 'C14age_spinupLGM_PD.nc').
description: Note from Martin Butzin (2020-04-28): This dataset is deprecated and should no longer be used.
description: Supplement to: Butzin, Martin; Prange, Matthias; Lohmann, Gerrit (2012): Readjustment of glacial radiocarbon chronologies by self-consistent three-dimensional ocean circulation modeling. Earth and Planetary Science Letters, 317-318, 177-184
DOI: 10.1594/pangaea.902301
title: Marine radiocarbon reservoir ages simulated for IntCal20, link to model results in NetCDF format

description: Beyond ~13.9 cal kBP, the IntCal19 radiocarbon calibration curve is based upon combining data across a range of different archives including corals and planktic foraminifera. In order to reliably incorporate such marine data into an atmospheric curve, we need to resolve these records into their constituent atmospheric signal and marine reservoir age. This dataset includes results of marine reservoir age simulations enabling this resolution, applying the LSG ocean general circulation model forced with various climatic background conditions and with atmospheric radiocarbon changes according to the Hulu Cave speleothem record. Simulation period is 54,000-10,700 cal BP, depth range is 0-50 m. Land values are flagged with -100. This dataset is an update of PANGAEA datasets doi:10.1594/PANGAEA.876733 and doi:10.1594/PANGAEA.775379.
description: Supplement to: Butzin, Martin; Heaton, Timothy J; Köhler, Peter; Lohmann, Gerrit (2020): A short note on marine reservoir age simulations used in IntCal20. Radiocarbon, 1-7
DOI: 10.1594/pangaea.925631
title: Age determination of Atlantic Ocean sediment cores
DOI: 10.1594/pangaea.925634
title: Stable carbon isotope ratios of Cibicidoides wuellerstorfi of Atlantic Ocean sediment cores
DOI: 10.1594/pangaea.925633
title: 14C Ages of Atlantic Ocean sediment cores
DOI: 10.1594/pangaea.925636
title: Age model of Atlantic Ocean sediment cores
DOI: 10.1594/pangaea.907390
title: Pollen record of Kongor Lake sediments
DOI: 10.1594/pangaea.922057
title: Content and composition of water-soluble salts in the sediments of the second lagoon-marine terrace, in the Mongatalyangyakha River (Yavai Peninsula)

description: Content and composition of water-soluble salts in the sediments of the second lagoon-marine terrace, in the lower reaches of the Mongatalyangyakha River on the Yavai Peninsula (point 254-YuV)
DOI: 10.1594/pangaea.922065
title: δ¹⁸O, δ²H and dexc values in ice wedges and segregated ice interlayer from the outcrop of the Ery-Maretayakha river (Oblogov, 2016)

description: Data was compiled from G.E. Oblogov, 2016.
DOI: 10.1594/pangaea.915021
title: δ¹⁸O in ice wedge and pore ice from vicinity of Anadyr Town

description: Major ions and dissolved salts in syngenetic ice wedges in the 25–30 m thick Late Pleistocene Ledovy Obryv yedoma and the 60-m thick Ust'-Algan Obryv yedoma.