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  • 11
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    Diatom assemblage data from IODP Site 323-U1343 (2021)
    PANGAEA
    Details
    Publication Date: 2024-02-02
    Keywords: 323-U1343; Achnanthes spp.; Achnanthidium lanceolatum; Actinocyclus curvatulus; Actinocyclus ochotensis; Actinocyclus oculatus; Actinocyclus spp.; Actinoptychus senarius; AGE; Amphora spp.; Asteromphalus brookei; Asteromphalus spp.; Aulacodiscus spp.; Aulacoseira spp.; Azpeitia tabularis; Bacterosira bathyomphala; Bering Sea; Bering Sea Paleoceanography; Chaetoceros; Cocconeis costata; Cocconeis pribilofensis; Cocconeis scutellum; Cocconeis spp.; COMPCORE; Composite Core; Coscinodiscus marginatus; Coscinodiscus oculus-iridis; Coscinodiscus spp.; Counting, diatoms; Counts; Cyclostephanos spp.; Cyclotella spp.; Cymatosira belgica; Delphineis angustata; Delphineis kippae; Delphineis spp.; Delphineis surirella; Denticulopsis spp.; Detonula confervacea; Diatom; Diatoms, centrales; Diploneis smithii; Diploneis spp.; DSDP/ODP/IODP sample designation; Encyonema spp.; Eunotia spp.; Exp323; Fossula arctica; Fragilariopsis curta; Fragilariopsis cylindrus; Fragilariopsis oceanica; Fragilariopsis pacifica; Fragilariopsis pseudonana; Fragilariopsis reginae-jahniae; Fragilariopsis spp.; Haslea spp.; Joides Resolution; Leptocylindrus danicus; Mid Pleistocene Transition; MPT; Navicula directa; Navicula distans; Navicula spp.; Neodenticula seminae; Nitzschia frigida; Nitzschia spp.; Odontella aurita; Paralia sol; Paralia sulcata; Pinnularia quadratarea; Porosira glacialis; Proboscia curvirostris; Proboscia spp.; Psuedopodosira elegans; Rabdonema spp.; Raphoneis amphericos; Rhizosolenia hebetata; Rhizosolenia semispina; Rhizosolenia spp.; Rhizosolenia styliformis; Sample code/label; Sea ice; Shionodiscus oestrupii; Shionodiscus spp.; Shionodiscus trifultus; Silicon isotopes; Size fraction; Stellarima microtrias; Stellarima spp.; Stellarima stellaris; Stephanopyxis horridus; Stephanopyxis spp.; Stephanopyxis turris; Synedra spp.; Tabellaria flocculosa; Thalassionema nitzschioides; Thalassionema spp.; Thalassiosira antarctica var. borealis; Thalassiosira antarctica var. borealis, vegetative cell; Thalassiosira decipiens; Thalassiosira hyalina; Thalassiosira hyperborea; Thalassiosira jouseae; Thalassiosira leptopus; Thalassiosira lineata; Thalassiosira nordenskioeldii; Thalassiosira spp.; Thalassiothrix longissima; Trachyneis aspera; Unknown; δ30Si
    Type: Dataset
    Format: text/tab-separated-values, 5684 data points
    Location Call Number Limitation Availability
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  • 12
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    Sea-ice biomarkers, benthic and planktonic foraminiferal geochemistry, and benthic foraminiferal assemblage data from IODP Site U1343 between ~7 ka and 40 ka (2020)
    PANGAEA
    Details
    Publication Date: 2024-03-18
    Description: The dataset compiles sea-ice biomarkers (IP25, HBI II, HBI III, Triene E, Brassicasterol, Campesterol, Cholesterol, β- sitosterol) together with benthic and planktonic foraminiferal geochemistry (U/Ca, Mn/Ca, U/Mn, Mg/Ca) and benthic foraminiferal assemblage counts from Integrated Ocean Drilling Program Site U1343 in the eastern Bering Sea. The dataset covers the time range from 7.6-42 ka.
    Keywords: (9E)-2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyliden)pentadeca-9-ene per unit sediment mass; (9Z)-2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyliden)pentadeca-9-ene per unit sediment mass; 2,10,14-Trimethyl-6-enyl-7-(3-methylpent-1-enyl)pentadecene per unit sediment mass; 2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyl)pentadecane per unit sediment mass; 24-Ethylcholest-5-en-3beta-ol per unit sediment mass; 24-Methylcholest-5-en-3beta-ol per unit sediment mass; 24-Methylcholesta-5,22E-dien-3beta-ol per unit sediment mass; 323-U1343; AGE; Bering Sea; Bering Sea Paleoceanography; Bulimina exilis; Cassidulinoides parkeriana; Cholesterol per unit sediment mass; Classification; COMPCORE; Composite Core; Counting; DEPTH, sediment/rock; Elphidium batialis; Epistominella pulchella; Exp323; Foraminifera, benthic, other; Foraminifera, benthic, total; Gas chromatography - Mass spectrometry (GC-MS); Globobulimina spp.; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; Islandiella norcrossi; Joides Resolution; Manganese/Calcium ratio; Nonionella digitata; Nonionella labradorica; Phytoplankton biomarker Brassicasterol IP25 index; Phytoplankton biomarker C25 HBI (Z) triene IP25 index; Species; Uranium/Calcium ratio; Uranium/Manganese ratio; Uvigerina spp.; Valvulineria araucana
    Type: Dataset
    Format: text/tab-separated-values, 762 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 13
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    Sea-ice biomarkers, benthic and planktonic foraminiferal geochemistry, and benthic foraminiferal assemblage data from IODP Site U1343 between ~7 ka and 40 ka (2020)
    PANGAEA
    Details
    Publication Date: 2024-03-18
    Description: The dataset compiles sea-ice biomarkers (IP25, HBI II, HBI III, Triene E, Brassicasterol, Campesterol, Cholesterol, β- sitosterol) together with benthic and planktonic foraminiferal geochemistry (U/Ca, Mn/Ca, U/Mn, Mg/Ca) and benthic foraminiferal assemblage counts from Integrated Ocean Drilling Program Site U1343 in the eastern Bering Sea. The dataset covers the time range from 7.6-42 ka.
    Keywords: (9E)-2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyliden)pentadeca-9-ene per unit sediment mass; (9Z)-2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyliden)pentadeca-9-ene per unit sediment mass; 2,10,14-Trimethyl-6-enyl-7-(3-methylpent-1-enyl)pentadecene per unit sediment mass; 2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyl)pentadecane per unit sediment mass; 24-Ethylcholest-5-en-3beta-ol, fraction; 24-Methylcholest-5-en-3beta-ol, fraction; 24-Methylcholesta-5,22E-dien-3beta-ol per unit sediment mass; 323-U1343; AGE; Bering Sea; Bering Sea Paleoceanography; Bulimina exilis; Cassidulinoides parkeriana; Cholesterol, fraction; Classification; COMPCORE; Composite Core; Counting; DEPTH, sediment/rock; Elphidium batialis; Epistominella pulchella; Exp323; Foraminifera, benthic, other; Foraminifera, benthic, total; Gas chromatography - Mass spectrometry (GC-MS); Globobulimina spp.; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; Islandiella norcrossi; Joides Resolution; Magnesium/Calcium ratio; Manganese/Calcium ratio; Nonionella digitata; Nonionella labradorica; Phytoplankton biomarker Brassicasterol IP25 index; Phytoplankton biomarker C25 HBI (Z) triene IP25 index; Species; Uranium/Calcium ratio; Uranium/Manganese ratio; Uvigerina spp.; Valvulineria araucana
    Type: Dataset
    Format: text/tab-separated-values, 769 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 14
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    δ30Si diatom and diatom fossil assemblage data from IODP Site 323-U1343 between 0.6 and 1.2 Ma (2021)
    PANGAEA
    Details
    Publication Date: 2024-02-02
    Description: High latitude ocean-atmosphere CO2 dynamics are considered important in glacial-interglacial climate, with deep-ocean carbon burial via the biological pump being highly variable through the Quaternary. During the Mid-Pleistocene Transition (MPT) shift to 100 kyr glacials, it has been suggested that elevated atmospheric-driven iron fertilisation and increased efficiency of the biological pump in the Southern Ocean was key in lowering atmospheric pCO2 and facilitating rapid land ice accumulation. Growing evidence suggests carbon cycling in the subarctic Pacific Ocean played a key role in late Quaternary glacials, although this has not yet been assessed during the MPT. Here, the silicon isotope composition of diatoms (δ30Sidiatom) from the high productivity upwelling region in the Bering Sea is used to assess the role of the subarctic Pacific biological pump in the MPT. Results show the “900 kyr event” was characterised by low silicic acid but high nitrate utilisation, coincident with the dominance of diatom resting spores. This indicates the region became nitrate- and light-limited, rather than iron-limited, due to the development of thick pack ice and expansion of glacial North Pacific Intermediate Water (GNPIW) which suppressed nutrient upwelling. We posit that iron fertilisation from sea ice expansion, coupled with the preferential preservation and higher cellular carbon content of diatom resting spores, increased regional carbon export and contributed to lower atmospheric pCO2. Remnant iron and remineralised silicic acid also likely propagated into the lower subarctic Pacific Ocean through GNPIW, aiding regionally high productivity once upwelling/vertical mixing was restored during deglaciations.
    Keywords: Bering Sea; Diatom; Mid Pleistocene Transition; MPT; Sea ice; Silicon isotopes; δ30Si
    Type: Dataset
    Format: application/zip, 4 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 15
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    Table 1. Radiocarbon dates from TPC522 and box core surface samples from BC521 and BC523 (2015)
    PANGAEA
    In:  Supplement to: Peck, Victoria L; Allen, Claire Susannah; Kender, Sev; McClymont, Erin L; Hodgson, Dominic A (2015): Oceanographic variability on the West Antarctic Peninsula during the Holocene and the influence of upper circumpolar deep water. Quaternary Science Reviews, 119, 54-65, https://doi.org/10.1016/j.quascirev.2015.04.002
    Details
    Publication Date: 2024-02-02
    Description: Recent intensification of wind-driven upwelling of warm upper circumpolar deep water (UCDW) has been linked to accelerated melting of West Antarctic ice shelves and glaciers. To better assess the long term relationship between UCDWupwelling and the stability of theWest Antarctic Ice Sheet, we present a multi-proxy reconstruction of surface and bottom water conditions in Marguerite Bay, West Antarctic Peninsula (WAP), through the Holocene. A combination of sedimentological, diatom and foraminiferal records are, for the first time, presented together to infer a decline in UCDW influence within Marguerite Bay through the early to mid Holocene and the dominance of cyclic forcing in the late Holocene. Extensive glacial melt, limited sea ice and enhanced primary productivity between 9.7 and 7.0 ka BP is considered to be most consistent with persistent incursions of UCDW through Marguerite Trough. From 7.0 ka BP sea ice seasons increased and productivity decreased, suggesting that UCDW influence within Marguerite Bay waned, coincident with the equatorward migration of the Southern Hemisphere Westerly Winds (SWW). UCDW influence continued through the mid Holocene, and by 4.2 ka BP lengthy sea ice seasons persisted within Marguerite Bay. Intermittent melting and reforming of this sea ice within the late Holocene may be indicative of episodic incursions of UCDW into Marguerite Bay during this period. The cyclical changes in the oceanography within Marguerite Bay during the late Holocene is consistent with enhanced sensitively to ENSO forcing as opposed to the SWW-forcing that appears to have dominated the early to mid Holocene. Current measurements of the oceanography of the WAP continental shelf suggest that the system has now returned to the early Holocene-like oceanographic configuration reported here, which in both cases has been associated with rapid deglaciation.
    Keywords: Age, calibrated; Age, dated; Age, dated, range, maximum; Age, dated, range, minimum; Age, dated material; Age, dated standard deviation; BC; Box corer; Carbon, organic, total; DEPTH, sediment/rock; Event label; James Clark Ross; JR179; JR179_BC521; JR179_BC523; JR179_TPC522; JR20080221; Laboratory code/label; Marguerite Bay; PC; Piston corer; δ13C, organic carbon
    Type: Dataset
    Format: text/tab-separated-values, 112 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 16
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    Drake passage benthic foraminiferal abundance during the last deglaciation (2020)
    PANGAEA
    Details
    Publication Date: 2024-02-02
    Description: The Antarctic Cold Reversal (ACR; 14.7 to 13 ka) phase of the last deglaciation saw a pause in the rise of atmospheric pCO2 and Antarctic temperature, contrasted with warming in the North. Mechanisms associated with interhemispheric heat transfer have been proposed to explain features of this event, but the response of marine biota and the carbon cycle are debated. The Southern Ocean is a key site of deep-water exchange with the atmosphere, hence deglacial changes in nutrient cycling, circulation, and productivity in this region may have global impact. Here we present a new perspective on the sequence of events in the deglacial Southern Ocean, that includes multi-faunal benthic assemblage (foraminifera and cold-water corals) and geochemical data (Ba/Ca, 14C, δ11B) from the Drake Passage. Our records feature anomalies during peak ACR conditions indicative of circulation, biogeochemistry, and regional ecosystem perturbations. Within this cold episode, peak abundances of thick-walled benthic foraminifera and cold-water corals are observed at shallow depths in the sub-Antarctic (~300 m), while coral populations at greater depths and further south diminished. Geochemical data indicate that habitat shifts were associated with enhanced primary productivity in the sub-Antarctic, a more stratified water column, and poorly oxygenated bottom water. These results are consistent with northward migration of primary production in response to Antarctic cooling and widespread biotic turnover across the Southern Ocean. We suggest that expanding sea ice, suppressed ventilation, and shifting centres of upwelling drove changes in planktic and benthic ecology, and were collectively instrumental in halting CO2 rise in the mid-deglaciation.
    Keywords: Alabaminella weddellensis; Angulogerina earlandi; Bolivina spp.; Bulimina aculeata; Bulimina sp.; Calendar age; Cassidulina carinata; Cassidulina crassa; Cibicidoides spp.; Core; DEPTH, sediment/rock; Epistominella exigua; Falkland Plateau, Southern Falkland Plateau (same site as GC526); Fissurina spp.; Foraminifera; Foraminifera, benthic agglutinated; Fursenkoina fusiformis; GC; GC528 CORE_NO 528; Globobulimina sp.; Gravity corer; Hoeglundina elegans; Hoeglundina sp.; James Clark Ross; JR20110128; JR244; JR244-GC528; Lagena spp.; Melonis barleeanus; Melonis spp.; Nonionella auris; Nonionella pulchella; Nonionella spp.; Number of taxa; Nuttallides umbonifera; Oridorsalis sp.; Oridorsalis umbonatus; Pullenia bulloides; Pullenia quinqueloba; Pyrgo spp.; Sphaeroidina bulloides; Total counts; Triloculina spp.; Uvigerina bifurcata; Uvigerina spp.; Wet mass
    Type: Dataset
    Format: text/tab-separated-values, 4995 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 17
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    Age determination of sediment core PS75/160-1 derived from 1C AMS-dating (2017)
    PANGAEA
    Details
    Publication Date: 2024-02-02
    Keywords: Age, 14C AMS; Age, dated; Age, dated material; Age, dated standard deviation; ANT-XXVI/3; Calendar age; Calendar age, maximum/old; Calendar age, minimum/young; Calendar age, standard error; Comment; DEPTH, sediment/rock; Gravity corer (Kiel type); Pine Island Bay (inner shelf); Polarstern; PS75; PS75/160-1; Sample, optional label/labor no; SL
    Type: Dataset
    Format: text/tab-separated-values, 84 data points
    Location Call Number Limitation Availability
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  • 18
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    Foraminifera distribution of sediment core PS75/160-1 (2017)
    PANGAEA
    Details
    Publication Date: 2024-02-02
    Keywords: Alabaminella weddellensis; Angulogerina angulosa; Angulogerina pauperata; Angulogerina sp.; Angulogerina spp.; ANT-XXVI/3; Astrononion antarcticum; Astrononion echolsi; Calendar age; Cassidulina neocarinata; Cibicides aff. grossepunctatus; DEPTH, sediment/rock; Ehrenbergina glabra; Epistominella exigua; Foraminifera; Foraminifera, agglutinated, species indeterminata; Fursenkoina fusiformis; Globocassidulina biora; Globocassidulina sp.; Globocassidulina spp.; Globocassidulina subglobosa; Gravity corer (Kiel type); Neogloboquadrina pachyderma sinistral; Nonionella bradii; Nonionella iridea; Nonionella sp.; Nonionella spp.; Parafissurina fusiformis; Pine Island Bay (inner shelf); Polarstern; PS75; PS75/160-1; Pyrgo depressa; Pyrgo elongata; SL; Stainforthia davisi; Uvigerina sp.
    Type: Dataset
    Format: text/tab-separated-values, 837 data points
    Location Call Number Limitation Availability
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  • 19
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    Stable isotopes of sediment core PS75/160-1 (2017)
    PANGAEA
    Details
    Publication Date: 2024-02-02
    Keywords: Angulogerina angulosa, δ13C; Angulogerina angulosa, δ18O; ANT-XXVI/3; Calendar age; DEPTH, sediment/rock; Gravity corer (Kiel type); Mass spectrometry; Neogloboquadrina pachyderma sinistral, δ13C; Neogloboquadrina pachyderma sinistral, δ18O; Pine Island Bay (inner shelf); Polarstern; PS75; PS75/160-1; SL
    Type: Dataset
    Format: text/tab-separated-values, 487 data points
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  • 20
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    Stable isotopes of sediment core PS69/251-1 (2018)
    PANGAEA
    Details
    Publication Date: 2024-02-02
    Keywords: Amundsen Sea; ANT-XXIII/4; Corrected; DEPTH, sediment/rock; Giant box corer; GKG; Isotope ratio mass spectrometry; Neogloboquadrina pachyderma sinistral, δ13C; Neogloboquadrina pachyderma sinistral, δ18O; Polarstern; PS69; PS69/251-1
    Type: Dataset
    Format: text/tab-separated-values, 21 data points
    Location Call Number Limitation Availability
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