cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.889751
title: Diatom carbon isotope data and CO2 reconstruction from ODP Site 145-882 through the late Pliocene

description: The development of large ice-sheets across the Northern Hemisphere during the late Pliocene and the emergence of the glacial-interglacial cycles that punctuate the Quaternary mark a significant threshold in Earth's climate history. Although a number of different mechanisms have been proposed to initiate this cooling and the onset of major Northern Hemisphere glaciation, reductions in atmospheric concentrations of CO2 likely played a key role. The emergence of a stratified (halocline) water column in the subarctic north-west Pacific Ocean at 2.73 Ma has often been interpreted as an event which would have limited oceanic ventilation of CO2 to the atmosphere, thereby helping to cool the global climate system. Here, diatom carbon isotopes (δ13Cdiatom) are used to reconstruct changes in regional carbon dynamics through this interval. Results show that the development of a salinity stratification did not fundamental alter the net oceanic/atmospheric flux of CO2 in the subarctic north-west Pacific Ocean through the late Pliocene/early Quaternary. These results provide further insights into the long-term controls on global carbon cycling and the role of the subarctic Pacific Ocean in instigating global climatic changes.
description: Supplement to: Swann, George E A; Kendrick, Christopher P; Dickson, Alexander J; Worne, Savannah (2018): Late Pliocene Marine ρCO₂ Reconstructions From the Subarctic Pacific Ocean. Paleoceanography and Paleoclimatology, 33(5), 457-469
DOI: 10.1594/pangaea.138605
title: Total fauna of benthic foraminifera of sediment core Kronsmoor, Late Cretaceous
DOI: 10.1594/pangaea.821660
title: Layering experiment with 20 g/m**3 silt concentration
DOI: 10.1594/pangaea.961080
title: XRF Zr/Sr ratios for the spliced stratigraphic section of Marine Isotope Stages (MIS) 42-43 at IODP Site 339-U1385, southern Portuguese Margin
DOI: 10.1594/pangaea.317310
title: Current meter data at station ACM4_BEST_2 (CMDB code rcm00996)
DOI: 10.1594/pangaea.807741
title: Component parts of the World Heat Flow Data Collection
DOI: 10.1594/pangaea.317309
title: Current meter data at station ACM4_BEST_2 (CMDB code rcm00995)
DOI: 10.1594/pangaea.317313
title: Current meter data at station ACM4_BEST_3 (CMDB code rcm00999)
DOI: 10.1594/pangaea.755131
title: Suspended particulate matter measured on water samples of station PotterCove_2 at Potter Cove, King George Island, Western Antarctic Peninsula in 2002
DOI: 10.1594/pangaea.88776
title: Upper Aptian Pré-Guittard (Niveau Kilian) ecological important nannofossils, stable isotopes, carbonate and TOC values in SE France

description: Method see Geissen et al, 1999, Micropaleontology
DOI: 10.1594/pangaea.754629
title: Physical oceanography at CTD station PotterCove_1 at Potter Cove, King George Island, West Antarctic Peninsula in 2006
DOI: 10.1594/pangaea.736855
title: Physical oceanography at CTD station PotterCove_1 at Potter Cove, King George Island, West Antarctic Peninsula in 1996
DOI: 10.1594/pangaea.737604
title: Physical oceanography at CTD station PotterCove_1 at Potter Cove, King George Island, West Antarctic Peninsula in 1992
DOI: 10.1594/pangaea.738617
title: Suspended particulate matter measured on water samples of station PotterCove_1 at Potter Cove, King George Island, Western Antarctic Peninsula in 1993
DOI: 10.1594/pangaea.755125
title: Suspended particulate matter measured on water samples of station PotterCove_1 at Potter Cove, King George Island, Western Antarctic Peninsula in 2009
DOI: 10.1594/pangaea.77348
title: Range chart of nannofossils in profile Serre Chaitieu, SE France

description: Range chart of nannofossils in profile Serre Chaitieu, SE France
description: C=common (&gt;1 specimen/field view); F=frequent (1 specimen/2-10 fields of view); R=rare (1 speciemen/&gt;11 fields of view)
DOI: 10.1594/pangaea.317314
title: Current meter data at station ACM4_BEST_4 (CMDB code rcm01000)
DOI: 10.1594/pangaea.811824
title: Magnetic properties of sediment core MD01-2443
DOI: 10.1594/pangaea.811825
title: Magnetic properties of sediment core MD01-2444
DOI: 10.1594/pangaea.138608
title: Diversity and number of benthic foraminifers of sediment core Kronsmoor, Late Cretaceous
DOI: 10.1594/pangaea.547799
title: Age model with bulk sediment stable isotopes and carbonate content of sediment core Site 199-1218 from the equatorial Pacific

description: New data compiled with published results from Wade & Pälike, 2004 and Coxall et al., 2005 (see reference column)
DOI: 10.1594/pangaea.737887
title: Chlorophyll a concentrations measured on water samples of station PotterCove_2 at Potter Cove, King George Island, Western Antarctic Peninsula in 1992
DOI: 10.1594/pangaea.787102
title: (Table 3) Relative abundance of Azolla spp., peridinoid dinocysts, gonyaulacoid dinocysts, non-saccate pollen, bisaccate pollen and spores from the Lomonosov Ridge during different Arctic coring expeditions

description: mMD = meters measured depth.a = high proportion of Senegalinium spp. b = high proportion of Cerodinium depressum, Deflandrea spp. Wetzeliella spp. and Senegalinium spp. c = high proportion of Phthanoperidinium spp. and Wetzeliella spp. d= all sites yielded megaspores. (-) = rare (+) = frequent (++) = common (+++)V = visible * = megaspore apparatuses with attached microspore massula(e). t = megaspore apparatuses that themselves were indeterminable, but had massula(e) attached that could be identified.
DOI: 10.1594/pangaea.737889
title: Chlorophyll a concentrations measured on water samples of station PotterCove_1 at Potter Cove, King George Island, Western Antarctic Peninsula in 1993
DOI: 10.1594/pangaea.919837
title: d18O of bulk carbonate from sediment core MD01-2444 on the Portuguese Margin, Marine Isotope Stage 3

description: Bulk carbonate oxygen isotopes: Oxygen isotopes were measured using a ThermoFisher GasBench II equipped with a CTC Combi-Pal autosampler and interfaced via continuous flow with a ThermoFisher MAT 253 isotope ratio mass spectrometer (IRMS). About 200-300 mg of bulk sample was used. Analytical precision is estimated to be ±0.08% for d18O of an internal standard (Carrara marble).Age model: The age model was developed by aligning the abrupt transitions of d18O record of G. bulloides in core MD01-2444 to warming and cooling events in the NGRIP d18Oice record, presented on: (i) the GICC05 timescale [Svensson, A. et al. A 60,000 year Greenland stratigraphic ice core chronology. Clim. Past 4, 47–57 (2008)]; and (ii) the WD2014: modified timescale, whereby NGRIP GICC05 ice ages 31.2–67.2 ka are multiplied by 1.0063. [Buizert, C. et al. The WAIS Divide deep ice core WD2014 chronology – Part 1: Methane synchronization (68–31 ka BP) and the gas age–ice age difference. Clim. Past 11, 153-173 (2015)].
DOI: 10.1594/pangaea.770400
title: Chlorophyll a concentrations measured on water samples of Station PotterCove_1 at Potter Cove, King George Island, Western Antarctic Peninsula in 1999
DOI: 10.1594/pangaea.898593
title: Determination of phycotoxins and toxigenic dinoflagellates abundance during R/V Coriolis II cruise in February 2014

description: The occurrence of harmful algal blooms (HABs) is a global problem, and particularly in San Jorge Gulf (SJG), Argentina, which supports important fisheries, HABs represent a risk to human health. We studied the diversity and distribution of toxigenic dinoflagellates in the SJG using toxin detection and quantification, and assessed the connections between cell densities, toxins, and oceanographic parameters. Phytoplankton net samples were taken for microscopic and liquid chromatography-​tandem mass spectrometry (LC-MSMS) analyses during an expedition aboard R/V Coriolis II in February 2014. Solid phase adsorption toxin tracking (SPATT) devices were also deployed to determine the presence of dissolved lipophilic toxins in seawater. Toxigenic dinoflagellate species and associated toxins showed different distribution patterns in the north and the south SJG. Protoceratium reticulatum and Dinophysis acuminata, together with yessotoxin and pectenotoxins, were predominantly detected in the northern SJG, mainly associated with low-nutrient, warmer waters. By contrast, Alexandrium catenella and paralytic shellfish toxins showed the highest relative abundances in the southern SJG, associated with high-nutrient, low-temperature waters. Cellular toxin content was also differently affected by environmental parameters, highlighting the complexity of HABs in this area. Spirolides were detected by SPATT for the first time in the SJG, suggesting the occurrence of A. ostenfeldii.
description: Supplement to: Fabro, Elena; Krock, Bernd; Torres, Américo I; Paparazzo, Flavio E; Schloss, Irene R; Ferreyra, Gustavo A; Almandoz, Gastón Osvaldo (2018): Toxigenic Dinoflagellates and Associated Toxins in San Jorge Gulf, Argentina. Oceanography, 31(4), 145-153
DOI: 10.1594/pangaea.755130
title: Suspended particulate matter measured on water samples of station PotterCove_2 at Potter Cove, King George Island, Western Antarctic Peninsula in 2001
DOI: 10.1594/pangaea.770406
title: Chlorophyll a concentrations measured on water samples of Station PotterCove_1 at Potter Cove, King George Island, Western Antarctic Peninsula in 2005
DOI: 10.1594/pangaea.787096
title: (Table 2) Distinctive microspore massula characteristics of Azolla arctica, Azolla jutlandica, Azolla sp. 1 and Azolla sp. 2
DOI: 10.1594/pangaea.895270
title: Physical oceanography measured with CTD/Watersampler-system during PU2013 to the Barents Sea in 2013

description: Project: Arctic Floating University 2013 (“Плавучий Университет”)
DOI: 10.1594/pangaea.754725
title: Physical oceanography at CTD station PotterCove_2 at Potter Cove, King George Island, West Antarctic Peninsula in 2001
DOI: 10.1594/pangaea.821670
title: Mixing experiment with 1200 g/m**3 silt concentration
DOI: 10.1594/pangaea.77378
title: (Fig. 5B) Stable isotope on bulk carbonate of profile Pré-Guittard, SE France
DOI: 10.1594/pangaea.77380
title: (Fig. 6) Nutrient and temperature index calculated from profile L´Arboudeysse, SE France
DOI: 10.1594/pangaea.737839
title: Chlorophyll a concentrations measured on water samples of station PotterCove_2 at Potter Cove, King George Island, Western Antarctic Peninsula in 1991
DOI: 10.1594/pangaea.77383
title: (Fig. 8) Nutrient and temperature index calculated from profile Pré-Guittard, SE France
DOI: 10.1594/pangaea.738584
title: Suspended particulate matter measured on water samples of station PotterCove_1 at Potter Cove, King George Island, Western Antarctic Peninsula in 1996
DOI: 10.1594/pangaea.728541
title: Pollen record of sediment core MD99-2348

description: Palynology has been performed for the first time on Late Quaternary sediments of the Gulf of Lions. The aim is both to tighten the chronology of seismic profiles in the region, and to elucidate the vegetation of southern France during the Last Climatic Cycle.Four cores, taken on the shelf, mostly record Marine Isotope Stages (MIS) 1 and 2 and part of MIS 3 and MIS 5. The latter sediments might have been preserved in a paleodepression on the emergent shelf between the Rhône and the Hérault rivers. It would explain their preservation against transgression and regression erosions of more recent stages.This study also provides a synthesis of palynological continental data collected during the last 40 years in southern Europe. Preliminary comparisons made between the latter and new marine data demonstrate that refugia of Picea and Abies existed in southern France during MIS 3 and MIS 2. The dynamics of Artemisia, deciduous Quercus and Corylus, Abies and finally Fagus is also reconstructed for the last deglaciation. First results obtained in the Gulf of Lions confirm and complete that synthesis.
description: Supplement to: Beaudouin, Célia; Suc, Jean-Pierre; Acherki, Nabila; Courtois, Laurent; Rabineau, Marina; Aloisi, Jean-Claude; Sierro, Francisco Javier; Oberlin, Christine (2005): Palynology of the Northwestern Mediterranean Shelf (Gulf of Lions): first vegetational record for the last climatic cycle. Marine and Petroleum Geology, 22(6-7), 845-863
DOI: 10.1594/pangaea.919842
title: Pollen data from sediment core MD01-2444 on the Portuguese Margin, Marine Isotope Stage 3

description: Pollen analysis: Sediment samples of 1.5-4 cm3 were prepared for pollen analysis using the standard hot acid digestion technique. Fine sieving, through a mesh of 10 m or less, was not used as it could result in a loss of pollen. Residues were mounted in silicone oil for microscopic analysis at magnifications of 400, 630 and 1000 times. Abundances are expressed as percentages of the main sum, which includes all pollen except Pinus, Pteridophyte spores and aquatics. A minimum of 100 pollen grains, excluding Pinus, spores and aquatics, was counted in each sample. The pollen record was generated by V. Margari, with contributions from P.C. Tzedakis.Age model: The age model was developed by aligning the abrupt transitions of d18O record of G. bulloides in core MD01-2444 to warming and cooling events in the NGRIP d18Oice record, presented on: (i) the GICC05 timescale [Svensson, A. et al. A 60,000 year Greenland stratigraphic ice core chronology. Clim. Past 4, 47–57 (2008)]; and (ii) the WD2014: modified timescale, whereby NGRIP GICC05 ice ages 31.2–67.2 ka are multiplied by 1.0063. [Buizert, C. et al. The WAIS Divide deep ice core WD2014 chronology – Part 1: Methane synchronization (68–31 ka BP) and the gas age–ice age difference. Clim. Past 11, 153-173 (2015)].
DOI: 10.1594/pangaea.754625
title: Physical oceanography at CTD station PotterCove_1 at Potter Cove, King George Island, West Antarctic Peninsula in 1999
DOI: 10.1594/pangaea.872783
title: CLAM age model and biomes of sediment core Carp_Lake
DOI: 10.1594/pangaea.77252
title: Composite section of cretaceous nannofossils from profile Col_de_Palluel, SE France

description: C=common (&gt;1 specimen/field view); F=frequent (1 specimen/2-10 fields of view); R=rare (1 speciemen/&gt;11 fields of view)
DOI: 10.1594/pangaea.831753
title: Age model of composite sediment core MD01-2444/2443

description: A composite section was created by splicing Cores MD01-2444 and MD01-2443 together at ~194 ka. The splice tie point corresponds to a depth of 27.42 mbsf in MD01-2444 and 16.74 mbsf in Core MD01-2443. The age model is a modified version of the one derived by Barker et al. (2011) based on correlation of millennial variability in MD01-2444 and MD01-2443 records to a synthetic Greenland temperature record produced using the EPICA Dome C (EDC) ice core and placed on the absolute speleothem timescale (GLt_syn age).
DOI: 10.1594/pangaea.842562
title: (Table 1) Bioclimatic subzones and soil characteristics along the Yamal Arctic Transect, northwestern Siberia

description: Sustainability of tundra vegetation under changing climate on the Yamal Peninsula, northwestern Siberia, home to the world's largest area of reindeer husbandry, is of crucial importance to the local native community. An integrated investigation is needed for better understanding of the effects of soils, climate change and grazing on tundra vegetation in the Yamal region. In this study we applied a nutrient-based plant community model - ArcVeg - to evaluate how two factors (soil organic nitrogen (SON) levels and grazing) interact to affect tundra responses to climate warming across a latitudinal climatic gradient on the Yamal Peninsula. Model simulations were driven by field-collected soil data and expected grazing patterns along the Yamal Arctic Transect (YAT), within bioclimate subzones C (high arctic), D (northern low arctic) and E (southern low arctic). Plant biomass and NPP (net primary productivity) were significantly increased with warmer bioclimate subzones, greater soil nutrient levels and temporal climate warming, while they declined with higher grazing frequency. Temporal climate warming of 2 °C caused an increase of 665 g/m**2 in total biomass at the high SON site in subzone E, but only 298 g/m**2 at the low SON site. When grazing frequency was also increased, total biomass increased by only 369 g/m**2 at the high SON site in contrast to 184 g/m**2 at the low SON site in subzone E. Our results suggest that high SON can support greater plant biomass and plant responses to climate warming, while low SON and grazing may limit plant response to climate change. In addition to the first order factors (SON, bioclimate subzones, grazing and temporal climate warming), interactions among these significantly affect plant biomass and productivity in the arctic tundra and should not be ignored in regional scale studies.
description: Bulk density was labelled with "g/m³" in the article. As this is highly improbable with the given values, we assume that the unit should be "g/cm³". Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150
description: Supplement to: Yu, Qin; Epstein, Howard E; Walker, Donald A (2009): Simulating the effects of soil organic nitrogen and grazing on arctic tundra vegetation dynamics on the Yamal Peninsula, Russia. Environmental Research Letters, 4(4), 045027
DOI: 10.1594/pangaea.919834
title: δ¹⁸O of benthic foraminifera from sediment core MD01-2444 on the Portuguese Margin, Marine Isotope Stage 3

description: Benthic foraminifera oxygen isotopes: The benthic isotope record was generated by the late N.J. Shackleton. Measurements were carried out in the Godwin Laboratory for Palaeoclimate Research (University of Cambridge), using a VG PRISM mass spectrometer. Where possible two or three separate analyses of different benthic species were made in each sample; a correction factor was applied according to the species and the average of all the corrected values at each level is shown in the figures. The following species were analysed, and adjusted as indicated: Cibicidoides sp.: +0.51; Uvigerina peregrina and similar specimens: 0.0; Globobulimina affinis: -0.4; Cibicidoides wuellerstorfi, +0.64; Globocassidulina sp.: -0.1; Hoeglundina elegans: -0.7. These adjustments are optimized for this particular core in accordance with the long-standing convention by which Uvigerina peregrina is assumed to deposit oxygen in isotopic equilibrium. Results are reported with reference to the international standard VPDB and the precision is better than ±0.08‰ for d18O. Age model: The age model was developed by aligning the abrupt transitions of d18O record of G. bulloides in core MD01-2444 to warming and cooling events in the NGRIP d18Oice record, presented on: (i) the GICC05 timescale [Svensson, A. et al. A 60,000 year Greenland stratigraphic ice core chronology. Clim. Past 4, 47–57 (2008)]; and (ii) the WD2014: modified timescale, whereby NGRIP GICC05 ice ages 31.2–67.2 ka are multiplied by 1.0063. [Buizert, C. et al. The WAIS Divide deep ice core WD2014 chronology – Part 1: Methane synchronization (68–31 ka BP) and the gas age–ice age difference. Clim. Past 11, 153-173 (2015)].
DOI: 10.1594/pangaea.52401
title: (Table A1) Stable oxygen and carbon isotope ratios of Cibicidoides spp. in sediment core RC13-229 in the Cape Basin, Atlantic Ocean (specmap2.018)

description: For isotope data of the top 1 m sediment see Oppo and Fairbanks (1987) data set: doi:10.1594/PANGAEA.701348
DOI: 10.1594/pangaea.825453
title: (Table 1) Geochemistry of the ETM-2 section from IODP Hole 302-M0004A

description: During the early Eocene, a series of short-term global warming events ("hyperthermals”) occurred in response to the rapid release of carbon into the oceans and atmosphere. In order to investigate the response of ocean redox to global warming, we have determined the molybdenum isotope compositions (d98/95Mo) of samples spanning one such hyperthermal (Eocene Thermal Maximum 2 (ETM-2, 54.1 Ma)), from Integrated Ocean Drilling Program Expedition 302 Site M0004A in the Arctic Ocean. The highest d98/95Mo in our sample set (2.00 ± 0.11 per mil) corresponds to the development of local euxinia at Site M0004A during the peak of ETM-2, which we interpret as recording the global seawater d98/95Mo at that time. The ETM-2 seawater d98/95Mo is indistinguishable from a recent estimate of seawater d98/95Mo from an earlier hyperthermal (Paleocene Eocene Thermal Maximum (PETM, 55.9 Ma), d98/95Mo = 2.08 ± 0.11 per mil). We argue that the similarity in seawater d98/95Mo during ETM-2 and the PETM was caused by the development of transient euxinia in the Arctic Ocean during each hyperthermal that allowed sediments accumulating in this basin to capture the long-term d98/95Mo of early Eocene seawater. Our new data therefore place a minimum constraint on the magnitude of transient global seafloor deoxygenation during early Eocene hyperthermals.
description: Sediment depth is given in mcd.
description: Supplement to: Dickson, Alexander J; Cohen, Anthony S (2012): A molybdenum isotope record of Eocene Thermal Maximum 2: Implications for global ocean redox during the early Eocene. Paleoceanography, 27(3), PA3230
DOI: 10.1594/pangaea.77250
title: Calcareous nannofossils, palynomorphs and benthic foraminifera of section L´Arboudeysse

description: To better understand the linkage between climate and ocean circulation under greenhouse conditions we have studied calcareous nannofossils, palynomorphs and benthic foraminifera from the Early Albian Oceanic Anoxic Event 1b black shale (OAE 1b) in the Vocontian Basin (SE France). We propose that monsoonal activity resulting from precessional forcing and modulated by eccentricity-driven temperature changes represents the driving factor of OAE 1b formation in low latitudes. With the onset of OAE 1b, increasingly warm and humid conditions, stronger winds and enhanced terrestrial input led to higher surface water productivity. Therefore, increased productivity is an important factor for OAE 1b formation in the Vocontian Basin. However, monsoonally forced productivity changes are a regional climate signal only. The supraregional occurrence of the OAE 1b is probably due to a reduction of deep water formation in the low latitudes under extremely warm and humid conditions, leading to enhanced preservation of organic matter.
description: Method see Geisen et al, 1999, Micropaleontology; Wood et al., 1996, Am Ass Strati Palynol Found
description: Supplement to: Herrle, Jens O; Pross, Jörg; Friedrich, Oliver; Hemleben, Christoph (2003): Short-term environmental changes in the Cretaceous Tethyan Ocean: micropaleontological evidence from the Early Albian Oceanic anoxic event 1b. Terra Nova, 15(1), 14-19
DOI: 10.1594/pangaea.872823
title: CLAM age model and biomes of sediment core Valle_di_Castiglione
DOI: 10.1594/pangaea.779351
title: (Table T1) Mineralogy and geochemistry of ODP Hole 192-1183A and Hole 192-1186A sediments, Ontong Java Plateau

description: Boron, Ca, Na, and Gd concentrations and H intensity in sediments obtained during Ocean Drilling Program Leg 192 were determined by prompt gamma neutron activation analysis. The results show strong positive correlation between B content and H intensity in carbonate samples; chalk samples have higher B contents than limestone samples. Average B content is 9.1 ppm for the chalk and 5.2 ppm for the limestone. When chert blocks or clay minerals are present in the carbonate samples, B content increases (up to 91 ppm).
description: Supplement to: Sano, Takashi; Naruse, Hajime; Hasenaka, Toshiaki; Fukuoka, Takaaki (2004): Data report: Boron contents of Leg 192 sediments. In: Fitton, JG; Mahoney, JJ; Wallace, PJ; Saunders, AD (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 192, 1-6