cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.833129
title: (Table 2) Age determination of sediment core GeoB7139-2

description: We present high-resolution bulk sedimentary d15N data from the southern edge of the present-day oxygen minimum zone of the eastern South Pacific. The record is interpreted as representing changes in water column nitrogen removal during the last 70,000 years. We found significant fluctuations in the isotopic signal that suggest major reorganizations of the oxygen minimum zone at millennial timescales. These fluctuations were not related to other millennial-scale changes like the Northern Hemisphere's Dansgaard-Oeschger climate swings or local changes in primary productivity, so appear to be dictated by the Southern Hemisphere's climate rhythm. This is preliminarily corroborated by an overall agreement between our d15N data and the sedimentary proxy of ice sheet dynamics in Patagonia, which is in turn correlated with surface water properties at the midlatitude subduction region of the eastern South Pacific intermediate waters. Finally, potential implications on late Quaternary changes in atmospheric CO2 concentrations are discussed.
description: Supplement to: De Pol-Holz, Ricardo; Ulloa, Osvaldo; Lamy, Frank; Dezileau, Laurent; Sabatier, Pierre; Hebbeln, Dierk (2007): Late Quaternary variability of sedimentary nitrogen isotopes in the eastern South Pacific Ocean. Paleoceanography, 22(2), PA2207
DOI: 10.1594/pangaea.888832
title: Age determination of sediment core BALLYWOO, Ballywoolen, United Kingdom

description: This dataset was archived on 2018-04-23 from the EPD database (http://www.europeanpollendatabase.net).
DOI: 10.1594/pangaea.889003
title: Age determination of sediment core HAYLEYWO, Hayley Wood, United Kingdom

description: This dataset was archived on 2018-04-23 from the EPD database (http://www.europeanpollendatabase.net).
DOI: 10.1594/pangaea.829951
title: (Table 1) Age determination of sediment core DA04-31P

description: Measuerd on Neogloboquadrina pachyderms s.
DOI: 10.1594/pangaea.886464
title: Age determination of sediment core GUERIVI, La Guérivière, France

description: This dataset was archived on 2018-02-19 from the EPD database (http://www.europeanpollendatabase.net).
DOI: 10.1594/pangaea.807081
title: (Table 1) Chlorophyll concentration and pigment composition of carotenoids in three heathland bryophytes, northern Sweden

description: Background and Aims: Anthropogenic depletion of stratospheric ozone in Arctic latitudes has resulted in an increase of ultraviolet-B radiation (UV-B) reaching the biosphere. UV-B exposure is known to reduce aboveground biomass and plant height, to increase DNA damage and cause accumulation of UV-absorbing compounds in polar plants. However, many studies on Arctic mosses tended to be inconclusive. The importance of different water availability in influencing UV-B impacts on lower plants in the Arctic has been poorly explored and might partially explain the observed wide variation of responses, given the importance of water in controlling bryophyte physiology. This study aimed to assess the long-term responses of three common sub-Arctic bryophytes to enhanced UV-B radiation (+UV-B) and to elucidate the influence of water supply on those responses.Results: Responses were species specific: H. splendens responded most to +UV-B, with reduction in both annual growth (-22%) and sporophyte production (-44%), together with increased b-carotene, violaxanthin, total chlorophyll and NPQ, and decreased zeaxanthin and de-epoxidation of the xanthophyll cycle pool (DES). Barbilophozia lycopodioides responded less to +UV-B, showing increased b-carotene and sclerophylly and decreased UV-absorbing compounds. Polytrichum commune only showed small morphogenetic changes. No effect of UV-B on bryophyte cover was observed. Water availability had profound effects on bryophyte ecophysiology, and plants showed, in general, lower growth and ETR, together with a higher photoprotection in the drier site. Water availability also influenced bryophyte responses to +UV-B and, in particular, responses were less detectable in the drier site.Conclusions: Impacts of UV-B exposure on Arctic bryophytes were significant, in contrast to modest or absent UV-B effects measured in previous studies. The impacts were more easily detectable in species with high plasticity such as H. splendens and less obvious, or more subtle, under drier conditions. Species biology and water supply greatly influences the impact of UV-B on at least some Arctic bryophytes and could contribute to the wide variation of responses observed previously.
description: Sample amount (n) = 4 for all. Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150
description: Supplement to: Arroniz-Crespo, Maria; Gwynn-Jones, Dylan; Callaghan, Terry V; Núñez-Olivera, E; Martínez-Abaigar, J; Horton, P; Phoenix, Gareth K (2011): Impacts of long-term enhanced UV-B radiation on bryophytes in two sub-Arctic heathland sites of contrasting water availability. Annals of Botany, 108(3), 557-565
DOI: 10.1594/pangaea.794520
title: (Table 1) Phosphorus components, CaCO3 and biogenic opal in sediments of ODP Site 167-1010
DOI: 10.1594/pangaea.755449
title: (Table 1k) Radiocarbon datings of Upper Quaternary bottom sediments from the Mediterranean Sea at Station VITYAZ7937
DOI: 10.1594/pangaea.614453
title: Chemical composition of gabbro-dolerites from Hole Heiss-1 drilled in the Heiss Island, Franz Josef Land Archipelago
DOI: 10.1594/pangaea.186261
title: Radiocarbon age determinations on sediment core V22-182
DOI: 10.1594/pangaea.793175
title: (Tab. 1) Results of the radiocarbon age dating of wood fragments from well Fersina-2
DOI: 10.1594/pangaea.763990
title: Surface seawater carbonate chemistry, nutrients and phytoplankton community composition on a transect between North Sea and Arctic Ocean, 2008

description: This data was collected during the 'ICE CHASER' cruise from the southern North Sea to the Arctic (Svalbard) in July-Aug 2008. This data consists of coccolithophore abundance, calcification and primary production rates, carbonate chemistry parameters and ancillary data of macronutrients, chlorophyll-a, average mixed layer irradiance, daily irradiance above the sea surface, euphotic and mixed layer depth, temperature and salinity.
description: In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne and Gattuso, 2011) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI).
description: Supplement to: Charalampopoulou, Anastasia; Poulton, Alex J; Tyrrell, Toby; Lucas, Mike I (2011): Irradiance and pH affect coccolithophore community composition on a transect between the North Sea and the Arctic Ocean. Marine Ecology Progress Series, 431, 25-43
DOI: 10.1594/pangaea.267748
title: Age determinations on sediment core PS1524-1
DOI: 10.1594/pangaea.132741
title: Dated age of sediment core NBP98-02-07-13
DOI: 10.1594/pangaea.804873
title: Table 2: AMS14C-datings performed on marine bivalves from 11 sediment cores

description: Age determinations by Leibniz-Labor, Kiel University, Germany
DOI: 10.1594/pangaea.763322
title: Tab 6.3 Compilation of 14C ages from Greenland

description: Published by various authors, compiled by Bernd Wagner.
DOI: 10.1594/pangaea.921320
title: Age determination of sediment core TRI1 retrieved from Lake Trichonida (southern Greece)

description: In spring 2018, the sediment core TRI1 (38°33'0.61" N, 21°35'20.76" E) was retrieved from 50m water depth in the central eastern part of Lake Trichonida, the largest Greek lake, using a high-precision wire-operated piston corer system (Usinger system). The here presented TRI1 master core sequence covers 438 cm (sedimentary units 9 - 19). AMS radiocarbon (14C) dates were processed at the Poznań Radiocarbon Laboratory. The core sequence covers the last 2600 years and was analysed to reconstruct ecosystem and landscape changes as well as palaeoclimatic fluctuations in SW Greece.
DOI: 10.1594/pangaea.767438
title: Radiocarbon ages measured in core PSh63-5159R from the southwest Barents Sea

description: Environmental changes in the surface and bottom water layers of the Ingøydjupet Basin and history of Atlantic water inflow to the southwestern Barents Sea during the last 16 ka are reconstructed on the base of planktic and benthic foraminiferal assemblages. A multiproxy study of sediment cores PSh-5159R and PSh-5159N, including AMS 14C dating, provides time resolution of about 200 years for the deglaciation period, 100 years for Holocene, and 25-50 years for the last 400 years. Stable polar conditions with sea ice on the surface were typical for the early deglaciation period. Unstable bottom settings and onset of ice rafting marked Oldest Dryas. Cold Atlantic water inflow increased notably during the Boiling-Allerod interstadial nearby the site location and then decreased during the Younger Dryas. Early Holocene was characterized by abrupt warming in the bottom and surface water layers, especially ~9.7-7.6 ka BP. Stable conditions prevailed during Middle Holocene. Remarkable changes in the sea-surface temperature and bottom environments occurred during last 2.5 cal. ka BP.
description: Supplement to: Chistyakova, Natalia O; Ivanova, Elena V; Risebrobakken, Bjørg; Ovsepyan, E A; Ovsepyan, Ya S (2010): Reconstruction of the postglacial environments in the southwestern Barents Sea based on foraminiferal assemblages. Translated from Okeanologiya, 2010, 50(4), 608-617, Oceanology, 50(4), 573-581
DOI: 10.1594/pangaea.944481
title: Radiocarbon ages of peat profile Kienberger Rinne KBR6
DOI: 10.1594/pangaea.944484
title: Radiocarbon ages of peat profile Pastlingsee
DOI: 10.1594/pangaea.944485
title: Radiocarbon ages of peat profile Torfteich Grabkow
DOI: 10.1594/pangaea.944486
title: Radiocarbon ages of peat profile Weisses Lauch
DOI: 10.1594/pangaea.944480
title: Radiocarbon ages of peat profile Kienberger Rinne KBR3
DOI: 10.1594/pangaea.944483
title: Radiocarbon ages of peat profile Maschnetzlauch
DOI: 10.1594/pangaea.744525
title: Radiocarbon ages of sediment profile Co1014
DOI: 10.1594/pangaea.50845
title: (Table 2) Geochemistry and radionuclides of sediment core SO60-93
DOI: 10.1594/pangaea.957432
title: 230Th dating results analyzed at the University of Minnesota (Dataset S1)

description: The error is 2s error. U decay constants: l238 = 1.55125x10-10 (Jaffey et al., 1971) and l234 = 2.82206x10-6 (Cheng et al., 2013). Th decay constant: l230 = 9.1705x10-6 (Cheng et al., 2013).*d234U = ([234U/238U]activity – 1)x1000. ** d234Uinitial was calculated based on 230Th age (T), i.e., d234Uinitial = d234Umeasured x el234xT.Corrected 230Th ages assume the initial 230Th/232Th atomic ratio of 4.4 ±2.2 x10-6. Those are the values for a material at secular equilibrium, with the bulk earth 232Th/238U value of 3.8. The errors are arbitrarily assumed to be 50%.***B.P. stands for "Before Present" where the "Present" is defined as the year 1950 A.D.
DOI: 10.1594/pangaea.957252
title: Radiocarbon dates from North Cantal Peatlands (France)

description: Dataset of radiocarbon dates obtained on peat and lacustrine/palsutrine sediment from several wetlands of North Cantal (Massif Central, France). All these data were acquired during the collective research project (PCR) on the archaeology of the Sianne and Sumène Valleys during the Bronze Age and the 1st Iron Age (Haute-Auvergne) coordinated by F. Delrieu (DRAC ARA, Service Régional de l'Archéologie, F-63000 Clermont-Ferrand).
description: Table of radiocarbon dates from North Cantal Peatlands, with site information (name, commune, coordinates, altitude) and sample details (depth, type of dated material, measured age, calibrated age according to the IntCal20 curve, δ13C measurements, and specificities). Warning: δ13C measurements were obtained at the output of the gas analyser and cannot be used directly to interpret environmental conditions.
DOI: 10.1594/pangaea.956902
title: Radiocarbon ages, calibrated radiocarbon ages and modelled ages of the composite profile from core Tuz-694
DOI: 10.1594/pangaea.957413
title: Robertson Speleothem U-Th dating results for samples analyzed at the Geological Survey of Israel (Dataset S1)

description: U decay constants: λ238=1.55125x10-10 (Jaffey et al., 1971) and λ234= 2.82x10-6 (Cheng et al., 2013).Th decay constant: λ230=9.1705x10-6 (Cheng et al., 2013).Corrected 230Th ages assume the initial 230Th/232Th atomic ratio of 4.4 ± 2.2 x10-6 for material in secular equilibrium with bulk earth 232Th/238U value of 3.8.
DOI: 10.1594/pangaea.50830
title: Radionuclides analysed on sediment core PS1533-3 from the Arctic Ocean
DOI: 10.1594/pangaea.669550
title: (Table 5) Luminescence-dating of sediment core 89-BC11 of the Arctic Ocean
DOI: 10.1594/pangaea.831399
title: (Table S3a) Concentrations of phosphorus components for ODP Hole 113-690B

description: DEPTH, sediment/rock [m] is given in mbsf.
DOI: 10.1594/pangaea.840655
title: (Table 2) Radiocarbon and calibrated ages of Lago Fagnano core LF06-PC16, Tierra del Fuego
DOI: 10.1594/pangaea.885527
title: Age determination of sediment core BRAKLOOL, Brackloon Lough, Ireland

description: This dataset was archived on 2018-01-25 from the EPD database (http://www.europeanpollendatabase.net).
DOI: 10.1594/pangaea.57382
title: tab 4
DOI: 10.1594/pangaea.831672
title: (Table 1) Age determination of sediment core MD01-2404

description: We analyzed the high-resolution foraminifer isotope records, total organic carbon (TOC), and opal content from an Okinawa Trough core MD012404 in order to estimate the monsoon hydrography and productivity changes in the East China Sea (ECS) of the tropical western Pacific over the past 100,000 years. The variability shown in the records on orbital time scales indicates that high TOC intervals coincide with the increases of boreal May-September insolation driven by precession cycles (~21 ka), implying a strong connection to the variations in monsoons. We also observed possibly nearly synchronous, millennial-scale changes of the ECS surface hydrography (mainly driven by salinity changes but also by temperature effects) and productivity coincident with monsoon events in the Hulu/Dongge stalagmite isotope records. We found that increased freshening and high productivity correlate with high monsoon intensity in interstadials. This study suggests that the millennial-scale changes in monsoon hydrography and productivity in the ECS are remarkable and persistent features over the past 100,000 years.
description: Nineteen AMS 14C dated points were calibrated by using Fairbanks et al.'s (2005, doi:10.1016/j.quascirev.2005.04.007) function. The remaining seven points were graphic correlations based upon Martinson et al.'s (1987, doi:10.1016/0033-5894(87)90046-9) data set that tuned by orbital forcing.
description: Supplement to: Chang, Yuan-Pin; Chen, Min-Te; Yokoyama, Yusuke; Matsuzaki, Hiroyuki; Thompson, William G; Kao, Shuh-Ji; Kawahata, Hodaka (2009): Monsoon hydrography and productivity changes in the East China Sea during the past 100,000 years: Okinawa Trough evidence (MD012404). Paleoceanography, 24(3), PA3208
DOI: 10.1594/pangaea.783852
title: (Table 1) Age determination and isotopic signature of last glacial Patagonian caly/silt

description: Ice cores provide a record of changes in dust flux to Antarctica, which is thought to reflect changes in atmospheric circulation and environmental conditions in dust source areas (Forster et al., 2007; Diekmann et al. 2000, doi:10.1016/S0031-0182(00)00138-3; Winckler et al., 2008, doi:10.1126/science.1150595; Reader et al., 1999, doi:10.1029/1999JD900033; Mahowald et al., 1999, doi:10.1029/1999JD900084; Petit et al., 1999, doi:10.1038/20859; 1990, doi:10.1038/343056a0 Delmonte et al., 2009, doi:10.1029/2008GL033382; Lambert et al., 2008, doi:10.1038/nature06763). Isotopic tracers suggest that South America is the dominant source of the dust (Grousset et al., 1992, doi:10.1016/0012-821X(92)90177-W; Basile et al., 1997, doi:10.1016/S0012-821X(96)00255-5; Gaiero et al., 2007, doi:10.1016/j.chemgeo.2006.11.003), but it is unclear what led to the variable deposition of dust at concentrations 20–50 times higher than present in glacial-aged ice (Petit et al., 1990, doi:10.1038/343056a0; Lambert et al., 2008, doi:10.1038/nature06763). Here we characterize the age and composition of Patagonian glacial outwash sediments, to assess the relationship between the Antarctic dust record from Dome C (refs Lambert et al., 2008, doi:10.1038/nature06763; Wolff et al., 2006, doi:10.1038/nature04614) and Patagonian glacial fluctuations (Sugden et al., 2005; McCulloch et al., 2005, doi:10.1111/j.0435-3676.2005.00260.x; Kaplan et al., 2008, doi:10.1016/j.quascirev.2007.09.013) for the past 80,000 years. We show that dust peaks in Antarctica coincide with periods in Patagonia when rivers of glacial meltwater deposited sediment directly onto easily mobilized outwash plains. No dust peaks were noted when the glaciers instead terminated directly into pro-glacial lakes. We thus propose that the variable sediment supply resulting from Patagonian glacial fluctuations may have acted as an on/off switch for Antarctic dust deposition. At the last glacial termination, Patagonian glaciers quickly retreated into lakes, which may help explain why the deglacial decline in Antarctic dust concentrations preceded the main phase of warming, sea-level rise and reduction in Southern Hemisphere sea-ice extent (Wolff et al., 2006, doi:10.1038/nature04614).
description: AGE (ka) is cal. ka.
description: Supplement to: Sugden, David E; McCulloch, Robert D; Bory, Aloys J-M; Hein, Andrew S (2009): Influence of Patagonian glaciers on Antarctic dust deposition during the last glacial period. Nature Geoscience, 2, 281-285
DOI: 10.1594/pangaea.921802
title: Radiocarbon measurements on tree rings of tree STK-C10
DOI: 10.1594/pangaea.949186
title: Carbon isotopes composition of otoliths from surface samples of the Lomonosov Ridge, Arctic Ocean

description: Fossil fish otoliths were collected in surface sediments (0 to 1 cm) from the Lomonosov Ridge, Arctic Ocean, recovered with a giant box corer during the R/V Polarstern Expedition PS87 of 2014. Carbon isotopic measurements of 22 specimens were performed in 2022, at the 14C laboratory of the Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Germany, with a MICADAS-mini carbon dating system. Results show a wide range of 14C-ages from ~44 to 0.4 ka, illustrating the mixing of late Quaternary fossils at the sediment surface in low sedimentation rate sites of the Arctic Ocean. Significant δ13C-values differences could be identified between pelagic and benthic fish, in accordance with their distinct habitats.
DOI: 10.1594/pangaea.919469
title: Geochemistry of ice wedges at Yedoma cliff
DOI: 10.1594/pangaea.888854
title: Age determination of sediment core IAZ, Iaz, Romania

description: This dataset was archived on 2018-04-23 from the EPD database (http://www.europeanpollendatabase.net).
DOI: 10.1594/pangaea.919457
title: Geochemistry of Holocene sediments at Yedoma cliff
DOI: 10.1594/pangaea.888853
title: Age determination of sediment core HUMELLES, Les Humelles, France

description: This dataset was archived on 2018-04-23 from the EPD database (http://www.europeanpollendatabase.net).
DOI: 10.1594/pangaea.945088
title: Thorium-Uranium dating of cold-water corals from MeBo sediment core GeoB18118-1

description: Laboratory code/label: IUPH: Institute for Environmental Physics, University of Heidelberg, Germany.delta234/238U, measured: Measured 234U/238U activity ratios (d234Um) are presented as deviation in permil from the equilibrium value.delta234/238U, initial: Decay corrected 234U/238U activity ratios (d234Ui) are calculated from the given ages; decay constants by Cheng et al. (2013) (URI: https://doi.org/10.1016/j.epsl.2013.04.006).Cold-water coral ages, isotope concentration and ratios. U-series datings were obtained from Lophelia pertusa or Madrepora oculata.
DOI: 10.1594/pangaea.945130
title: Thorium-Uranium dating of cold-water corals from MeBo sediment core GeoB18116-2

description: Laboratory code/label: IUPH: Institute for Environmental Physics, University of Heidelberg, Germany.delta234/238U, measured: Measured 234U/238U activity ratios (d234Um) are presented as deviation in permil from the equilibrium value.delta234/238U, initial: Decay corrected 234U/238U activity ratios (d234Ui) are calculated from the given ages; decay constants by Cheng et al. (2013) (URI: https://doi.org/10.1016/j.epsl.2013.04.006).Cold-water coral ages, isotope concentration and ratios. U-series datings were obtained from Lophelia pertusa or Madrepora oculata.
DOI: 10.1594/pangaea.945075
title: Thorium-Uranium dating of cold-water corals from MeBo sediment core GeoB18118-2

description: Laboratory code/label: IUPH: Institute for Environmental Physics, University of Heidelberg, Germany.delta234/238U, measured: Measured 234U/238U activity ratios (d234Um) are presented as deviation in permil from the equilibrium value.delta234/238U, initial: Decay corrected 234U/238U activity ratios (d234Ui) are calculated from the given ages; decay constants by Cheng et al. (2013) (URI: https://doi.org/10.1016/j.epsl.2013.04.006).Cold-water coral ages, isotope concentration and ratios. U-series datings were obtained from Lophelia pertusa or Madrepora oculata.
DOI: 10.1594/pangaea.946585
title: Stable oxygen and carbon isotopes of Cibicides lobatulus from the Lardos SW hill section, Rhodes, Greece
DOI: 10.1594/pangaea.958539
title: The oxygen isotopic composition of intermediate-to-deep Arctic seawater since 600 ka

description: The oxygen isotopic composition of benthic foraminifera (d18Ob) is widely used to date and correlate marine sediment sequences. However, d18Ob has found comparatively little use in the Arctic Ocean due both to uncertainty in Arctic marine sediment chronology and the lack of resemblance between Arctic and open ocean d18Ob records. We address this issue by combining Arctic d18Ob records (Cronin et al., 2019) with benthic ostracode Mg/Ca-BWT reconstructions (Cronin et al., 2017) to create a composite record of the history of seawater d18O in the intermediate-to-deep Arctic Ocean over the last 600 kyr. Seawater d18O and its uncertainty was calculated using PSU Solver (Thirumalai et al., 2016).
DOI: 10.1594/pangaea.946630
title: Radiocarbon age dating results from Lake Satagay, Yakutia, Russia

description: These datasets of sediment core EN18224-4 from Lake Satagay (63°04'40.8N 117°59'52.8E), Central Yakutia, Russia, comprise the following data: (I) Radiocarbon age dating results by AWI MICADAS; (II) continuous macroscopic charcoal counts (&gt; 150 µm), including the sum of particles per sample, their respective distributions in size classes (&gt;150 µm, 300-500 µm, &gt; 500 µm) and morphotype groups, as well as a low-resolution record of microscopic charcoal concentration from pollen slides (III) pollen and non-pollen palynomorph counts. The datasets have been described in more detail in the accompanying research paper. Metabarcoding results of sedimentary ancient DNA of terrestrial plants, also featured in the research paper, will be uploaded to the Dryad database (datadryad.org).
DOI: 10.1594/pangaea.57425
title: (Table 1) Radiocarbon ages from lake sediment cores from the north-central Kola Peninsula, Russia

description: Samples having a clear marine habitat are shown with their reservoir corrected age/ages are calcualted byse on a measured or assumed (-25) d13C/calibrations are made assuming a terrestrial source for each sample/marine samples are calibrated after reservoir correction.
DOI: 10.1594/pangaea.958696
title: Radiocarbon dating from the study site Omelchenki, Kharkiv region, Ukraine
DOI: 10.1594/pangaea.885488
title: Age determination of sediment core BRVE, Brve, Czech Republic

description: This dataset was archived on 2018-01-25 from the EPD database (http://www.europeanpollendatabase.net).