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  • 1
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    The inorganic carbonate system of surface sediment samples and of sediment core PS75/104-1 (2021)
    PANGAEA
    Details
    Publication Date: 2023-05-08
    Description: Here we show how surface sediment samples from ten locations from the Pacific Sector of the Southern Ocean and the downcore LGM to Holocene carbonate system of intermediate water sediment record PS75/104-1 offshore New Zealand. We measured foraminiferal B/Ca ratios via laser ablation-inductively coupled-mass spectrometry (LA-ICP-MS) and used the calibration of Yu et al. (2013) for Cibicidoides wuellerstorfi and Ronge et al. (under review) for C. dispars. Measurements were conducted at the GEOMAR in Kiel in 2013.
    Keywords: AWI_Paleo; B/Ca; cabonate system; calibration dataset; Carbonate chemistry; CO32-; Paleoenvironmental Reconstructions from Marine Sediments @ AWI
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    B/Ca ratios of Cibicidoides of PS75/104-1 (2021)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Description: Here we show the downcore LGM to Holocene carbonate system of intermediate water sediment record PS75/104-1 offshore New Zealand. We measured foraminiferal B/Ca ratios via laser ablation-inductively coupled-mass spectrometry (LA-ICP-MS) and used the calibration of Yu et al. (2013) for Cibicidoides wuellerstorfi and Ronge et al. (under review) for C. dispars. Measurements were conducted at the GEOMAR in Kiel in 2013.
    Keywords: AGE; ANT-XXVI/2; AWI_Paleo; B/Ca; cabonate system; Carbonate ion; Cibicidoides cf. wuellerstorfi, Boron/Calcium ratio; Cibicidoides cf. wuellerstorfi, Boron/Calcium standard deviation; Cibicidoides dispars, Boron/Calcium ratio; Cibicidoides dispars, Boron/Calcium standard deviation; CO32-; DEPTH, sediment/rock; KL; LA-ICP-MS, Laser-ablation inductively coupled plasma mass spectrometer; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Piston corer (BGR type); Polarstern; PS75/104-1; PS75 BIPOMAC; South Pacific Ocean; Δ carbonate ion content
    Type: Dataset
    Format: text/tab-separated-values, 128 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    B/Ca and carbonate ion concentrations of South Pacific Cibicidoides dispars (2021)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Description: Here we show surface sediment samples from ten locations from the Pacific Sector of the Southern Ocean (~44°S-48°S; ~174°E-116°W). We measured foraminiferal B/Ca ratios via laser ablation-inductively coupled-mass spectrometry (LA-ICP-MS) on Cibicidoides dispars, a species that is abundant in most samples of the Pacific sector of the Southern Ocean. Measurements were conducted at the GEOMAR in Kiel in 2013.
    Keywords: ANT-XXVI/2; AWI_Paleo; B/Ca; calibration dataset; Carbonate chemistry; Carbonate ion; Cibicidoides dispars, Boron/Calcium ratio; Cibicidoides dispars, Boron/Calcium standard deviation; CO32-; DEPTH, sediment/rock; Elevation of event; Event label; LA-ICP-MS, Laser-ablation inductively coupled plasma mass spectrometer; Latitude of event; Longitude of event; MUC; MultiCorer; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS75/099-1; PS75/100-1; PS75/101-2; PS75/104-2; PS75/105-1; PS75 BIPOMAC; SO213/2; SO213/2_59-1; SO213/2_63-1; SO213/2_68-1; SO213/2_79-1; SO213/2_81-1; Sonne; SOPATRA; South Pacific Ocean; Δ carbonate ion content
    Type: Dataset
    Format: text/tab-separated-values, 60 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    Stable carbon isotope ratios of Cibicidoides wuellerstorfi of sediment core PS75/104-1 (2021)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Description: Here we show the downcore LGM to Holocene carbonate system of intermediate water sediment record PS75/104-1 offshore New Zealand. We measured foraminiferal B/Ca ratios via laser ablation-inductively coupled-mass spectrometry (LA-ICP-MS) and used the calibration of Yu et al. (2013) for Cibicidoides wuellerstorfi and Ronge et al. (under review) for C. dispars. Measurements were conducted at the GEOMAR in Kiel in 2013.
    Keywords: AGE; ANT-XXVI/2; AWI_Paleo; B/Ca; cabonate system; Cibicidoides wuellerstorfi, δ13C; CO32-; DEPTH, sediment/rock; KL; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Piston corer (BGR type); Polarstern; PS75/104-1; PS75 BIPOMAC; South Pacific Ocean
    Type: Dataset
    Format: text/tab-separated-values, 29 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Southern Ocean contribution to both steps in deglacier atmospheric CO2 rise (2021)
    Springer
    In:  EPIC3Nature Scientific Reports, Springer, 11, pp. 22117
    Details
    Publication Date: 2021-11-18
    Description: The transfer of vast amounts of carbon from a deep oceanic reservoir to the atmosphere is considered to be a dominant driver of the deglacial rise in atmospheric CO2. Paleoceanographic reconstructions reveal evidence for the existence of CO2-rich waters in the mid to deep Southern Ocean. These water masses ventilate to the atmosphere south of the Polar Front, releasing CO2 prior to the formation and subduction of intermediate-waters. Changes in the amount of CO2 in the sea water directly affect the oceanic carbon chemistry system. Here we present B/Ca ratios, a proxy for delta carbonate ion concentrations Δ[CO32−], and stable isotopes (δ13C) from benthic foraminifera from a sediment core bathed in Antarctic Intermediate Water (AAIW), offshore New Zealand in the Southwest Pacific. We find two transient intervals of rising [CO32−] and δ13C that that are consistent with the release of CO2 via the Southern Ocean. These intervals coincide with the two pulses in rising atmospheric CO2at ~ 17.5–14.3 ka and 12.9–11.1 ka. Our results lend support for the release of sequestered CO2 from the deep ocean to surface and atmospheric reservoirs during the last deglaciation, although further work is required to pin down the detailed carbon transfer pathways.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Location Call Number Limitation Availability
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    PAPER (OA)
  • 6
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    Southern Ocean contribution to both steps in deglacial atmospheric CO2 rise (2021)
    Nature Research
    Details
    Publication Date: 2024-02-07
    Description: The transfer of vast amounts of carbon from a deep oceanic reservoir to the atmosphere is considered to be a dominant driver of the deglacial rise in atmospheric CO2. Paleoceanographic reconstructions reveal evidence for the existence of CO2-rich waters in the mid to deep Southern Ocean. These water masses ventilate to the atmosphere south of the Polar Front, releasing CO2 prior to the formation and subduction of intermediate-waters. Changes in the amount of CO2 in the sea water directly affect the oceanic carbon chemistry system. Here we present B/Ca ratios, a proxy for delta carbonate ion concentrations Δ[CO32−], and stable isotopes (δ13C) from benthic foraminifera from a sediment core bathed in Antarctic Intermediate Water (AAIW), offshore New Zealand in the Southwest Pacific. We find two transient intervals of rising [CO32−] and δ13C that that are consistent with the release of CO2 via the Southern Ocean. These intervals coincide with the two pulses in rising atmospheric CO2 at ~ 17.5–14.3 ka and 12.9–11.1 ka. Our results lend support for the release of sequestered CO2 from the deep ocean to surface and atmospheric reservoirs during the last deglaciation, although further work is required to pin down the detailed carbon transfer pathways.
    Type: Article , PeerReviewed
    Format: text
    Format: text
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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