cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.726951
title: (Table 4) Radiocarbon ages on coexisting planktonic foraminifera from sediment core V23-81
DOI: 10.1594/pangaea.842939
title: (Table 1) Age-depth relation in sediment core TTN057-13-PC4

description: The last glacial to interglacial transition was studied using down core records of stable isotopes in diatoms and foraminifera as well as surface water temperature, sea ice extent, and ice-rafted debris (IRD) concentrations from a piston core retrieved from the Atlantic sector of the Southern Ocean. Sea ice is the first variable to change during the last deglaciation, followed by nutrient proxies and sea surface temperature. This sequence of events is independent of the age model adopted for the core. The comparison of the marine records to Antarctic ice CO2 variation depends on the age model as 14C determinations cannot be obtained for the time interval of 29.5-14.5 ka. Assuming a constant sedimentation rate for this interval, our data suggest that sea ice and nutrient changes at about 19 ka B.P. lead the increase in atmospheric pCO2 by approximately 2000 years. Our diatom-based sea ice record is in phase with the sodium record of the Vostok ice core, which is related to sea ice cover and similarly leads the increase in atmospheric CO2. If gas exchange played a major role in determining glacial to interglacial CO2 variations, then a delay mechanism of a few thousand years is needed to explain the observed sequence of events. Otherwise, the main cause of atmospheric pCO2 change must be sought elsewhere, rather than in the Southern Ocean.
description: Supplement to: Shemesh, Aldo; Hodell, David A; Crosta, Xavier; Kanfoush, Sharon L; Charles, Christopher D; Guilderson, Thomas P (2002): Sequence of events during the last deglaciation in Southern Ocean sediments and Antarctic ice cores. Paleoceanography, 17(4), 1056
DOI: 10.1594/pangaea.878257
title: (Table S1) 230Th dating results of espeleothems from Jaraguá cave, Brazil, 2017
DOI: 10.1594/pangaea.770425
title: Quantitative LA-ICP-MS data obtained from sediment core GeoB12309-5 (0.4 mm resolution)
DOI: 10.1594/pangaea.726285
title: Age determination of sediment core V23-81 (Table 1)

description: Sharp jumps in climate punctuate the records from borings in the Greenland ice cap during the time interval 60,000 to about 20,000 yr ago. Rapid fluctuations are also seen in foraminifera records for cores from the northern Atlantic and in a pollen record from a core from a bog in the Vosges Mountains in France. In this paper we present a new radiocarbon chronology for northern Atlantic deep-sea core V23-81 which permits comparison with the radiocarbon-dated Vosges Mountains pollen record. Because of the lack of a 14C chronology for the Greenland ice record and of distortions peculiar to each of the three records, it is not yet possible to say whether or not the events are genetically related.
description: Measured on Globigerina pachyderma left
description: Supplement to: Broecker, Wallace S; Andree, Michael; Bonani, Georges; Wolfli, Willy; Oeschger, Hans; Klas, Mieczyslawa (1988): Can the Greenland climatic jumps be identified in records from ocean and land? Quaternary Research, 30(1), 1-6
DOI: 10.1594/pangaea.87326
title: (Table 1) Dated age of site R/V_Sedow_1937_2
DOI: 10.1594/pangaea.887322
title: 14C ages performed on marine sediment core GeoB16223-2
DOI: 10.1594/pangaea.186270
title: Radiocarbon age determinations on sediment core V23-73
DOI: 10.1594/pangaea.837767
title: (Table 1) Age determination of western North Atlantic sediment cores

description: Foraminiferal abundance, 14C ventilation ages, and stable isotope ratios in cores from high deposition rate locations in the western subtropical North Atlantic are used to infer changes in ocean and climate during the Younger Dryas (YD) and Last Glacial Maximum (LGM). The d18O of the surface dwelling planktonic foram Globigerinoides ruber records the present-day decrease in surface temperature (SST) of ~4°C from Gulf Stream waters to the northeastern Bermuda Rise. If during the LGM the modern d18O/salinity relationship was maintained, this SST contrast was reduced to 2°C. With LGM to interglacial d18O changes of at least 2.2 per mil, SSTs in the western subtropical gyre may have been as much as 5°C colder. Above ~2.3 km, glacial d13C was higher than today, consistent with nutrient-depleted (younger) bottom waters, as identified previously. Below that, d13C decreased continually to -0.5 per mil, about equal to the lowest LGM d13C in the North Pacific Ocean. Seven pairs of benthic and planktonic foraminiferal 14C dates from cores &gt;2.5 km deep differ by 1100 ± 340 years, with a maximum apparent ventilation age of ~1500 years at 4250 m and at ~4700 m. Apparent ventilation ages are presently unavailable for the LGM &lt; 2.5 km because of problems with reworking on the continental slope when sea level was low. Because LGM d13C is about the same in the deep North Atlantic and the deep North Pacific, and because the oldest apparent ventilation ages in the LGM North Atlantic are the same as the North Pacific today, it is possible that the same water mass, probably of southern origin, flowed deep within each basin during the LGM. Very early in the YD, dated here at 11.25 ± 0.25 (n = 10) conventional 14C kyr BP (equal to 12.9 calendar kyr BP), apparent ventilation ages &lt;2.3 km water depth were about the same as North Atlantic Deep Water today. Below ~2.3 km, four YD pairs average 1030 ± 400 years. The oldest apparent ventilation age for the YD is 1600 years at 4250 m. This strong contrast in ventilation, which indicates a front between water masses of very different origin, is similar to glacial profiles of nutrient-like proxies. This suggests that the LGM and YD modes of ocean circulation were the same.
description: Supplement to: Keigwin, Lloyd D (2004): Radiocarbon and stable isotope constraints on Last Glacial Maximum and Younger Dryas ventilation in the western North Atlantic. Paleoceanography, 19(4), PA4012
DOI: 10.1594/pangaea.877692
title: Radiocarbon calibration uncertainties for tree-ring chronologie Palughetto_P317

description: Note that in addition to the stated uncertainties the GICC05 counting error applies. However, as shown in figure 5, this error is likely overestimated for the investigated period and probably smaller than +-75 years (see also Muscheler et al. 2014, doi:10.1016/j.quascirev.2014.08.017). The close agreement between the placement of P305/A15 on GICC05 and IntCal13 (figure 7) supports this notion.The P305u GICC05 ages are based on figure 7 but are nearly identical to what is shown in figure 5The A15 GICC05 ages are based on figure 7, assuming a link between P305u and A15 at ring 150 of P305u (figure 6). We added an additional uncertainty of +-20 years to this link based on the Chi2 statistic shown in figure 6a.The P317 GICC05 ages are based on figure 5, but excluding links that would imply an overlap between P305u and P317 (see figure 6b and discussion in the text).
DOI: 10.1594/pangaea.713304
title: (Table DR1) Silicic tephras in ODP Hole 162-907B
DOI: 10.1594/pangaea.832565
title: (Table S1) Age determination of sediment core MD02-2589
DOI: 10.1594/pangaea.815777
title: (Table 3b) Results of isotope studies of zircons from Site C-10-U-01 quartzites of the Odessa quarry, Bug area
DOI: 10.1594/pangaea.832421
title: (Table 1) Age determination of sediment cores HU89038_8 and OCE326-GGC5

description: Models indicate that a complete shutdown of deep and intermediate water production is a possible consequence of extreme climate conditions in the northern North Atlantic, and the high ratio of 231Pa to 230Th on Bermuda Rise is evidence that this might have happened ∼17 ka during Heinrich event 1 (H1). However, new radiocarbon data from bivalves that lived at ∼4.6 km on the Bermuda Rise during H1 lead to a different conclusion. The bivalve data do indeed indicate ventilation of the deep western North Atlantic was suppressed during H1 but not as much as it was during the last glacial maximum. We propose that high diatom flux to the Bermuda Rise during H1 is at least in part responsible for increased 231Pa/230Th at that time. Although we cannot say for sure why opal production was so high in a gyre center location at that time, increased leakage of silica rich waters from the Southern Ocean to the North Atlantic is one possibility.
description: Sample OCE326-GGGC5 2.21 m depth, G. inflata reported on previously by McManus et al. (2004).
description: Supplement to: Keigwin, Lloyd D; Boyle, Edward A (2008): Did North Atlantic overturning halt 17,000 years ago? Paleoceanography, 23(1), PA1101
DOI: 10.1594/pangaea.727698
title: Table 3. Amino acid epimerization ratios and age determination for molluscs collected from Nordenskiold Bay
DOI: 10.1594/pangaea.734036
title: (Table 2) Age determination of sediment core INMD-110BX

description: Determinations by Beta-Analysical Laboratorie, Coral Gables, Fla. Bulk CaCO3. Half-life 5568 yr. Years before A.D. 1950 +/- 1 SD
DOI: 10.1594/pangaea.672043
title: (Table 1) Age determination of sediment core PTA03-06 from Laguna Potrok Aike, Patagonia

description: Project: South Argentinean Lake Sediment Archives and modeling (SALSA) http://www.salsa.uni-bremen.de; funded by German Ministry of Education and Research (BMBF) within the framework of the German Climate Research Program DEKLIM, http://www.deklim.de
DOI: 10.1594/pangaea.816580
title: (Table 1) K-Ar age and inert-gas-isotopes at DSDP Holes 68-501, 69-504B and 69-505B

description: Conventional K-Ar ages have been determined and inert-gas abundances have been measured on representative samples of altered rocks from Deep Sea Drilling Project Holes 501, 504B, and 505B in an attempt to correlate their degree of alteration with inert-gas and K-Ar data.Samples taken from the first 60 meters below the sediment/basalt interface give significantly higher ages than would be expected from the magnetic stratigraphy, though at greater depths the calculated ages are in broad agreement with the expected age.The inert gas ratios 20Ne/36Ar, 36Ar/84Kr, and 84Kr/130Xe also show a marked discontinuity at the 60-meter depth, and all these effects are interpreted as being a consequence of low-temperature alteration produced by burial metamorphism and by interaction with sea water (halmyrolysis).
description: Sub-basement depth measured from sediment/basalt interface. Sediment depth is given in mbsf.
description: Supplement to: Terrell, David J; Mitchell, John G (1983): Inert-gas contents of altered samples from Deep Sea Drilling Project Holes 501, 504B, and 505B, Costa Rica Rift. In: Cann, JR; Langseth, MG; Honnorez, J; Von Herzen, RP; White, SM; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 69, 651-655
DOI: 10.1594/pangaea.117010
title: Dated age of sediment core TN041-23F-MC
DOI: 10.1594/pangaea.805692
title: (Table 1) Radiocarbon dates of core JM05-085-GC, South-Barents Sea

description: The Late Weichselian-Early Holocene variability of the North Atlantic Current has been studied with focus on the zonal component of this meridional transport during the transition from glacial to interglacial conditions. The investigated sediment core is from 409 m water depth in the SW Barents Sea. Eight Accelerator mass spectrometry (AMS) 14C dates show that the core covers the last 20,000 cal yr B.P. with a centennial scale resolution during Late Weichselian-Early Holocene. Planktic foraminiferal assemblages were analyzed using the &gt;100 ?m size fraction and foraminiferal planktic and benthic d13C and d18O isotopes were measured. Furthermore, a range of physical and chemical analyses has been carried out on the bulk sediment samples. Four time periods have been identified which represent the varying oceanographic conditions in Ingøydjupet, a glacial trough located off the north coast of Norway in the SW Barents Sea. 1) The late glacial (before ca 15,000 cal yr B.P.) influenced by the nearby ice sheets with high amounts of sea ice- or iceberg-transported detritus. 2) The late Oldest Dryas stadial and the Bølling-Allerød interstadial (ca 15,000-12,700 cal yr B.P.) with cold surface water conditions influenced by the collapse of the nearby ice sheets, high amounts of sea ice- or iceberg-transported detritus and melt water and weak subsurface inflow of Atlantic Water. 3) The Younger Dryas cold stadial (12,700-11,650 cal yr B.P.) with low primary productivity and extensive sea ice cover and 4) The Preboreal and Early Holocene (11,650-6800 cal yr B.P. cal yr B.P.) with strong influx of Atlantic Water into the area, near absence of ice rafted debris and generally ameliorated conditions in both surface and bottom water masses as seen from a high flux of foraminifera and increased marine primary production.
description: A standard reservoir correction of ca 400 years with an additional reservoir correction DeltaR = 67 +/- 41 was used. Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150
description: Supplement to: Aagaard-Sørensen, Steffen; Husum, Katrine; Hald, Morten; Knies, Jochen (2010): Paleoceanographic development in the SW Barents Sea during the Late Weichselian-Early Holocene transition. Quaternary Science Reviews, 29(25-26), 3442-3456
DOI: 10.1594/pangaea.788130
title: (Appendix 1) Coral analysis and isostatic rebound effects from different Holes of IODP Expedition 310

description: Past sea-level records provide invaluable information about the response of ice sheets to climate forcing. Some such records suggest that the last deglaciation was punctuated by a dramatic period of sea-level rise, of about 20 metres, in less than 500 years. Controversy about the amplitude and timing of this meltwater pulse (MWP-1A) has, however, led to uncertainty about the source of the melt water and its temporal and causal relationships with the abrupt climate changes of the deglaciation. Here we show that MWP-1A started no earlier than 14,650 years ago and ended before 14,310 years ago, making it coeval with the Bølling warming. Our results, based on corals drilled offshore from Tahiti during Integrated Ocean Drilling Project Expedition 310, reveal that the increase in sea level at Tahiti was between 12 and 22 metres, with a most probable value between 14 and 18 metres, establishing a significant meltwater contribution from the Southern Hemisphere. This implies that the rate of eustatic sea-level rise exceeded 40 millimetres per year during MWP-1A.
description: Water depth ist given in mbsl.
description: Supplement to: Deschamps, Pierre; Durand, Nicolas; Bard, Edouard; Hamelin, Bruno; Camoin, Gilbert; Thomas, Alexander L; Henderson, Gideon M; Okuno, Junichi; Yokoyama, Yusuke (2012): Ice-sheet collapse and sea-level rise at the Bølling warming 14,600 years ago. Nature, 483, 559-564
DOI: 10.1594/pangaea.860740
title: Age determination of sediment core PS75/059-2
DOI: 10.1594/pangaea.376358
title: Age determinations on peat profile Rybachiy
DOI: 10.1594/pangaea.55468
title: Age determinations of sediment core PS1730-2
DOI: 10.1594/pangaea.856938
title: (Table 1) List of datums used to construct the age model of ODP Site 127-797
DOI: 10.1594/pangaea.87320
title: (Table 1) Dated age of site R/V_Sadko_1937_3
DOI: 10.1594/pangaea.388569
title: (Table 3) Age determinations on sediment core AHF-28181
DOI: 10.1594/pangaea.835444
title: (Table 2) Age determination of sediment core JR179_GC484
DOI: 10.1594/pangaea.857410
title: Age determination of sediment core GIK16523-1

description: High-resolution studies of a planktonic foraminifer core record from the South China Sea (SCS) (31KL: 18°45.4'N, 115°52.4'E, water depth 3360 m) reveal changes driven by ice-volume forcings in the climate of the East Asian monsoon in the western Pacific marginal sea during the late Quaternary. The analyses of planktonic foraminifer faunal abundance data from the core indicate significant variations in the relative abundances of the dominant taxa over the past 100,000 years since the isotope stage 5. The transfer function estimates of faunal sea surface temperatures (SST) correlate well with a long-term (104–105 years) trend of global glaciation. About 65,000 years ago, there was an observable change in the mode of SST variability as many low-latitude records have shown. These findings suggest that the SCS surface circulation and the East Asian winter monsoon systems are mainly driven by variations in global glaciation levels. The association of surface ocean cooling in the SCS with global climatic events suggests that fluctuations in the strength of the East Asian winter monsoon may be linked to shifts in the latitudinal position of the westerly winds and the Siberian high-pressure system.
description: Data from Imbrie et al (1984). The radiocarbon ages were made on mixed species of planktonic foraminifers and have been adjusted by 400 years to accommodate the modem age of tropical surface water. The 14C ages have been converted to calendar ages by applying the Stuiver and Braziunas (1993) calibration curve for ages younger than 18,400 14C years and the U/Th calibration curve (Bard et al., 1993) for older ages.
description: Supplement to: Chen, Min-Te; Huang, Chi-Yue (1998): Ice-volume forcing of winter monsoon climate in the South China Sea. Paleoceanography, 13(6), 622-633
DOI: 10.1594/pangaea.779178
title: (Table 2) Incremental heating and age determination for mineral separates from ODP Hole 129-800A dolerites
DOI: 10.1594/pangaea.835455
title: (Table 2) Age determination of sediment core PS69/299-1
DOI: 10.1594/pangaea.779179
title: (Table 3) Incremental heating and age determination for mineral separates from ODP Hole 129-801B alkalic basalts
DOI: 10.1594/pangaea.779182
title: (Table 5) Incremental heating and age determination of whole-rock samples from ODP Hole 129-802A
DOI: 10.1594/pangaea.819944
title: (Table 1) Isotopic Ar and ages at DSDP Holes 61-462 and 61-462A

description: Empty cells = no data.
DOI: 10.1594/pangaea.815778
title: (Table 3c) Results of isotope studies of zircons from Site C-10-U-03 gneiss of the Zaval'e graphite quarry, Bug area
DOI: 10.1594/pangaea.823431
title: (Table 2) Total fusion K-Ar age on basalt and feldspar at DSDP Hole 19-192A

description: Sample 19-192A-5-3,41-42 age, calculated is 37.4±0.9 My; J = 0.006231, 37Ar corrected for decay (t1/2 = 35.1 days).
DOI: 10.1594/pangaea.823414
title: (Appendix A) Age determination of Central Alps lake sediments

description: DEPTH, sdiment/rock [m] is given in composite depth [mcd].
DOI: 10.1594/pangaea.816310
title: (Table S1) Age determination of ODP Hole 162-980B
DOI: 10.1594/pangaea.857835
title: Age determination of sediment core SO202-18-6
DOI: 10.1594/pangaea.839401
title: (Table 1) Age determination of North Atlantic sediment cores

description: Four cores raised from the eastern Norwegian Sea and adjacent Norwegian fjords at sites influenced by Atlantic water have been investigated. Oxygen isotope analyses in benthic and planktonic foraminifera are used as a proxy for the paleotemperature development spanning the last 800 years. The cores have been dated using a combination of 210Pb and radiocarbon dates yielding time resolutions of 2-5 years for the last century and 9-25 years beyond this. The proxy records have been compared with instrumental time series covering the last 100 years in order to validate the oxygen isotope measurements as a proxy for paleotemperature. The comparison shows that the paleotemperature variability derived from the oxygen isotope analyses is generally similar to the amplitudes and trends seen in the instrumental time series. In particular, a cooling around 1905-1925 followed by a warming until 1955 is evident in all proxy records as well as in the instrumental time series. Beyond the last century the proxy records show two periods from ~1225-1450 and ~1650-1905(25) when temperatures were 1.3-1.6°C lower than present separated by a period of temperatures periodically comparable to present. The last 80 years represent the modern warming and appear to be the warmest period of the last 800 years. We find that that the ocean temperature variability is comparable to terrestrial reconstructions from the region implying a strong link in the ocean-atmosphere climate system. This suggests that the climate variability in this region beyond the period covered by instrumental time series was also associated with changes in the thermohaline circulation.
description: Data of P1-003 from Berstad et al. (2003).
description: Supplement to: Klitgaard-Kristensen, Dorthe; Sejrup, Hans Petter; Haflidason, Haflidi; Berstad, Ida Malene; Mikalsen, G (2004): Eight-hundred-year temperature variability from the Norwegian continental margin and the North Atlantic thermohaline circulation. Paleoceanography, 19(2), PA2007
DOI: 10.1594/pangaea.856815
title: (Table 1) Age determination of sediment cores GH93-KI-5 and KT94-15_PC-9
DOI: 10.1594/pangaea.204321
title: (Table 2) Age assessment T89-16, 14C dates and their calibration, Southeast Atlantic

description: Correction with a marine reservoir age of 0.4 ka. Age assessment is based on spline interpolation of calibrated 14C dates on bulk carbonate using the calibration of Stuiver et al. (1998).
DOI: 10.1594/pangaea.357127
title: Paleoecological investigation of Hessische Senke at site MS-TG860
DOI: 10.1594/pangaea.907453
title: Radiocarbon datings of sediments from the Paleo-Ems valley

description: Hand‐picked plant macrofossils (peat or plant remains) or marine calcareous fossils (mainly foraminifera and shell valves or their fragments) from 23 samples, as well as one wellpreserved but possibly reworked shell valve were dated using accelerator mass spectrometry 14C dating. Radiocarbon ages of samples from core GeoB17721‐1 were determined at the Poznań Radiocarbon Laboratory (Poznań, Poland), whereas radiocarbon ages from peat layers or layers of decayed organic matter in cores 09‐x were determined at the W. M. Keck Carbon Cycle Accelerator Mass Spectrometry Laboratory (University of California, Irvine) (see Table 1 for details). All radiocarbon dates were converted to calendar ages using the CALIB 7.0 program (Stuiver and Reimer, 1993; http://calib. org). The reservoir effect of the marine samples was corrected with ΔR values provided by Scourse et al. (2012) for the German Bight (mean ΔR = 83), with the restriction that the ΔR values were determined on post‐industrial samples.
description: Radiocarbon dates of GeoB17718‐3 were recalibrated from dates provided by Özmaral (2017).
description: Supplement to: Hepp, Daniel A; Romero, Oscar E; Mörz, Tobias; De Pol-Holz, Ricardo; Hebbeln, Dierk (2019): How a river submerges into the sea: a geological record of changing a fluvial to a marine paleoenvironment during early Holocene sea level rise. Journal of Quaternary Science, 34(7), 581-592
DOI: 10.1594/pangaea.357055
title: Paleoecological investigation of Hessische Senke at site RKS_10_27
DOI: 10.1594/pangaea.357137
title: Paleoecological investigation of Hessische Senke at site Rau-3a
DOI: 10.1594/pangaea.132734
title: Dated age of sediment core NBP98-02-05-12
DOI: 10.1594/pangaea.357068
title: Paleoecological investigation of Hessische Senke at site Wb-2
DOI: 10.1594/pangaea.357056
title: Paleoecological investigation of Hessische Senke at site RKS_11_12
DOI: 10.1594/pangaea.888869
title: Age determination of sediment core LEERDAM3, Leerdam, Netherlands

description: This dataset was archived on 2018-04-23 from the EPD database (http://www.europeanpollendatabase.net).
DOI: 10.15468/dl.ura9ty
title: Occurrence Download

description: A dataset containing 1034 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Geometry POLYGON((-78.73347 -6.6649,-78.48546 -6.6649,-78.48546 -6.44368,-78.73347 -6.44368,-78.73347 -6.6649))",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Plantae"
 ]
}

 The dataset includes 1034 records from 31 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0071070-250525065834625/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.