Data

Varied contribution of the Southern Ocean to deglacial atmospheric CO2 rise

Australian Antarctic Division

Moy, A. ; MOY, ANDREW

Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]

ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=info:doi10.26179/5d5df822acf6c&rft.title=Varied contribution of the Southern Ocean to deglacial atmospheric CO2 rise&rft.identifier=10.26179/5d5df822acf6c&rft.publisher=Australian Antarctic Data Centre&rft.description=Here we use oxygen, carbon and boron isotopes, and planktonic foraminiferal shell weights in planktonic foraminifera and an alkenone-based proxy of temperature to reconstruct seawater pH and CO2 partial pressure in sub-Antarctic surface waters south of Tasmania over the past 25,000 yearsGlacial–interglacial changes in atmospheric CO2 are generally attributed to changes in seawater carbon chemistry in response to large-scale shifts in the ocean’s biogeochemistry and general circulation. The Southern Ocean currently takes up more CO2 than any other and it is likely to have played a crucial role in regulating past atmospheric CO2. However, the physical, biological and chemical variables that control ocean–atmosphere CO2 exchange during glacial–interglacial cycles are not completely understood. Here we use boron isotopes and carbon isotopes in planktonic foraminifera and an alkenone-based proxy of temperature to reconstruct the seawater pH and CO2 partial pressure in sub-Antarctic surface waters south of Tasmania over the past 25,000 years, and investigate the mechanisms that regulate seawater CO2. The new record shows that surface waters in this region were a sink for atmospheric CO2 during the Last Glacial Maximum. Our reconstruction suggests changes in the strength of the biological pump and the release of deep-ocean CO2 to surface waters contributed to the last deglacial rise in atmospheric CO2. These findings demonstrate that variations in upwelling intensity and the distribution of Southern Ocean water masses in this sector played a key role in regulating atmospheric CO2 during the last glacial–interglacial cycle.Progress Code: completed&rft.creator=Moy, A. &rft.creator=MOY, ANDREW &rft.date=2019&rft.coverage=westlimit=146.283; southlimit=-45.15; eastlimit=146.283; northlimit=-45.15&rft.coverage=westlimit=146.283; southlimit=-45.15; eastlimit=146.283; northlimit=-45.15&rft.coverage=uplimit=3310; downlimit=0&rft.coverage=uplimit=3310; downlimit=0&rft_rights=These data are publicly available for download from the provided URL. For more information (including figures), please see the referenced paper.&rft_rights=Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/legalcode&rft_rights=This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_4061_MD972106_data_NGEO when using these data.&rft_rights=This metadata record is publicly available.&rft_subject=climatologyMeteorologyAtmosphere&rft_subject=EARTH SCIENCE > CLIMATE INDICATORS > PALEOCLIMATE INDICATORS > OCEAN/LAKE RECORDS > OXYGEN ISOTOPES&rft_subject=EARTH SCIENCE > CLIMATE INDICATORS > PALEOCLIMATE INDICATORS > OCEAN/LAKE RECORDS > ISOTOPES&rft_subject=EARTH SCIENCE > CLIMATE INDICATORS > PALEOCLIMATE INDICATORS > OCEAN/LAKE RECORDS > MICROFOSSILS&rft_subject=EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > PROTISTS > AMOEBOIDS > FORAMINIFERS&rft_subject=CARBON ISOTOPES&rft_subject=BORON ISOTOPES&rft_subject=FORAMINIFERAL SHELL WEIGHTS&rft_subject=ALKENONE SST ESTIMATES&rft_subject=IRMS > ISOTOPIC RATIO MASS SPECTROMETER&rft_subject=LABORATORY&rft_subject=Palaeo Start Date 2 ka&rft_subject=Palaeo Stop Date 25 ka&rft_subject=PHANEROZOIC > CENOZOIC > QUATERNARY > PLEISTOCENE&rft_subject=ACE/CRC&rft_subject=AMD/AU&rft_subject=CEOS&rft_subject=AMD&rft_subject=GEOGRAPHIC REGION > POLAR&rft_subject=OCEAN > SOUTHERN OCEAN > SOUTH TASMAN RISE&rft.type=dataset&rft.language=English Access the data

Access data via landing page
http://data.aad.gov.au...

Cite Saved to MyRDA Save to MyRDA

Licence & Rights:

Open Licence view details

Attribution 4.0 International (CC BY 4.0)
https://creativecommons.org/licenses/by/4.0/legalcode

These data are publicly available for download from the provided URL. For more information (including figures), please see the referenced paper.

This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_4061_MD972106_data_NGEO when using these data.

This metadata record is publicly available.

Access:

Other

Full description

Here we use oxygen, carbon and boron isotopes, and planktonic foraminiferal shell weights in planktonic foraminifera and an alkenone-based proxy of temperature to reconstruct seawater pH and CO2 partial pressure in sub-Antarctic surface waters south of Tasmania over the past 25,000 years

Glacial–interglacial changes in atmospheric CO2 are generally attributed to changes in seawater carbon chemistry in response to large-scale shifts in the ocean’s biogeochemistry and general circulation. The Southern Ocean currently takes up more CO2 than any other and it is likely to have played a crucial role in regulating past atmospheric CO2. However, the physical, biological and chemical variables that control ocean–atmosphere CO2 exchange during glacial–interglacial cycles are not completely understood. Here we use boron isotopes and carbon isotopes in planktonic foraminifera and an alkenone-based proxy of temperature to reconstruct the seawater pH and CO2 partial pressure in sub-Antarctic surface waters south of Tasmania over the past 25,000 years, and investigate the mechanisms that regulate seawater CO2. The new record shows that surface waters in this region were a sink for atmospheric CO2 during the Last Glacial Maximum. Our reconstruction suggests changes in the strength of the biological pump and the release of deep-ocean CO2 to surface waters contributed to the last deglacial rise in atmospheric CO2. These findings demonstrate that variations in upwelling intensity and the distribution of Southern Ocean water masses in this sector played a key role in regulating atmospheric CO2 during the last glacial–interglacial cycle.

Lineage

Progress Code: completed

Notes

Purpose
To reconstruct seawater pH and CO2 partial pressure in sub-Antarctic surface waters, and investigate the mechanisms regulating surface water CO2 over the last glacial-interglacial cycle.

Data time period: 2012-07-01 to 2018-06-30

This dataset is part of a larger collection

Click to explore relationships graph

text: westlimit=146.283; southlimit=-45.15; eastlimit=146.283; northlimit=-45.15

text: uplimit=3310; downlimit=0

Subjects

User Contributed Tags

Other Information

Download the dataset. (GET DATA > DIRECT DOWNLOAD)

url : https://data.aad.gov.au/eds/4981/download External Link

Public information for AAS project AAS_4061 (PROJECT HOME PAGE)

url : https://projects.aad.gov.au/report_project_public.cfm?project_no=AAS_4061 External Link

Citation reference for this metadata record and dataset. (VIEW RELATED INFORMATION)

url : https://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_4061_MD972106_data_NGEO External Link

Identifiers

DOI : 10.26179/5D5DF822ACF6C
global : AAS_4061_MD972106_data_NGEO