Multiple carbon cycle mechanisms associated with the glaciation of Marine Isotope Stage 4
Here we use high-precision carbon isotope data (δ13C-CO2) to show atmospheric CO2 during Marine Isotope Stage 4 (MIS 4, ~70.5-59 ka) was controlled by a succession of millennial-scale processes. Enriched δ13C-CO2 during peak glaciation suggests increased ocean carbon storage. Variations in δ13C-CO2...
Main Authors: | , , , , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
eScholarship, University of California
2022
|
Subjects: | |
Online Access: | https://escholarship.org/uc/item/2vg912kx |
id |
ftcdlib:oai:escholarship.org:ark:/13030/qt2vg912kx |
---|---|
record_format |
openpolar |
spelling |
ftcdlib:oai:escholarship.org:ark:/13030/qt2vg912kx 2023-09-05T13:21:33+02:00 Multiple carbon cycle mechanisms associated with the glaciation of Marine Isotope Stage 4 Menking, James A Shackleton, Sarah A Bauska, Thomas K Buffen, Aron M Brook, Edward J Barker, Stephen Severinghaus, Jeffrey P Dyonisius, Michael N Petrenko, Vasilii V 5443 2022-01-01 application/pdf https://escholarship.org/uc/item/2vg912kx unknown eScholarship, University of California qt2vg912kx https://escholarship.org/uc/item/2vg912kx public Nature Communications, vol 13, iss 1 Life Below Water Carbon Carbon Cycle Carbon Dioxide Carbon Isotopes Ice Cover Seawater article 2022 ftcdlib 2023-08-21T18:05:17Z Here we use high-precision carbon isotope data (δ13C-CO2) to show atmospheric CO2 during Marine Isotope Stage 4 (MIS 4, ~70.5-59 ka) was controlled by a succession of millennial-scale processes. Enriched δ13C-CO2 during peak glaciation suggests increased ocean carbon storage. Variations in δ13C-CO2 in early MIS 4 suggest multiple processes were active during CO2 drawdown, potentially including decreased land carbon and decreased Southern Ocean air-sea gas exchange superposed on increased ocean carbon storage. CO2 remained low during MIS 4 while δ13C-CO2 fluctuations suggest changes in Southern Ocean and North Atlantic air-sea gas exchange. A 7 ppm increase in CO2 at the onset of Dansgaard-Oeschger event 19 (72.1 ka) and 27 ppm increase in CO2 during late MIS 4 (Heinrich Stadial 6, ~63.5-60 ka) involved additions of isotopically light carbon to the atmosphere. The terrestrial biosphere and Southern Ocean air-sea gas exchange are possible sources, with the latter event also involving decreased ocean carbon storage. Article in Journal/Newspaper North Atlantic Southern Ocean University of California: eScholarship Southern Ocean |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Life Below Water Carbon Carbon Cycle Carbon Dioxide Carbon Isotopes Ice Cover Seawater |
spellingShingle |
Life Below Water Carbon Carbon Cycle Carbon Dioxide Carbon Isotopes Ice Cover Seawater Menking, James A Shackleton, Sarah A Bauska, Thomas K Buffen, Aron M Brook, Edward J Barker, Stephen Severinghaus, Jeffrey P Dyonisius, Michael N Petrenko, Vasilii V Multiple carbon cycle mechanisms associated with the glaciation of Marine Isotope Stage 4 |
topic_facet |
Life Below Water Carbon Carbon Cycle Carbon Dioxide Carbon Isotopes Ice Cover Seawater |
description |
Here we use high-precision carbon isotope data (δ13C-CO2) to show atmospheric CO2 during Marine Isotope Stage 4 (MIS 4, ~70.5-59 ka) was controlled by a succession of millennial-scale processes. Enriched δ13C-CO2 during peak glaciation suggests increased ocean carbon storage. Variations in δ13C-CO2 in early MIS 4 suggest multiple processes were active during CO2 drawdown, potentially including decreased land carbon and decreased Southern Ocean air-sea gas exchange superposed on increased ocean carbon storage. CO2 remained low during MIS 4 while δ13C-CO2 fluctuations suggest changes in Southern Ocean and North Atlantic air-sea gas exchange. A 7 ppm increase in CO2 at the onset of Dansgaard-Oeschger event 19 (72.1 ka) and 27 ppm increase in CO2 during late MIS 4 (Heinrich Stadial 6, ~63.5-60 ka) involved additions of isotopically light carbon to the atmosphere. The terrestrial biosphere and Southern Ocean air-sea gas exchange are possible sources, with the latter event also involving decreased ocean carbon storage. |
format |
Article in Journal/Newspaper |
author |
Menking, James A Shackleton, Sarah A Bauska, Thomas K Buffen, Aron M Brook, Edward J Barker, Stephen Severinghaus, Jeffrey P Dyonisius, Michael N Petrenko, Vasilii V |
author_facet |
Menking, James A Shackleton, Sarah A Bauska, Thomas K Buffen, Aron M Brook, Edward J Barker, Stephen Severinghaus, Jeffrey P Dyonisius, Michael N Petrenko, Vasilii V |
author_sort |
Menking, James A |
title |
Multiple carbon cycle mechanisms associated with the glaciation of Marine Isotope Stage 4 |
title_short |
Multiple carbon cycle mechanisms associated with the glaciation of Marine Isotope Stage 4 |
title_full |
Multiple carbon cycle mechanisms associated with the glaciation of Marine Isotope Stage 4 |
title_fullStr |
Multiple carbon cycle mechanisms associated with the glaciation of Marine Isotope Stage 4 |
title_full_unstemmed |
Multiple carbon cycle mechanisms associated with the glaciation of Marine Isotope Stage 4 |
title_sort |
multiple carbon cycle mechanisms associated with the glaciation of marine isotope stage 4 |
publisher |
eScholarship, University of California |
publishDate |
2022 |
url |
https://escholarship.org/uc/item/2vg912kx |
op_coverage |
5443 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
North Atlantic Southern Ocean |
genre_facet |
North Atlantic Southern Ocean |
op_source |
Nature Communications, vol 13, iss 1 |
op_relation |
qt2vg912kx https://escholarship.org/uc/item/2vg912kx |
op_rights |
public |
_version_ |
1776202141540548608 |