Impact of oceanic circulation on biological carbon storage in the ocean and atmospheric pCO2
Author Posting. © American Geophysical Union, 2008. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Global Biogeochemical Cycles 22 (2008): GB3007, doi:10.1029/2007GB002958. We use both theory a...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/3407 2023-05-15T17:36:11+02:00 Impact of oceanic circulation on biological carbon storage in the ocean and atmospheric pCO2 Marinov, Irina Gnanadesikan, Anand Sarmiento, Jorge L. Toggweiler, J. R. Follows, Michael J. Mignone, B. K. 2008-07-23 application/pdf text/plain application/postscript application/x-tex https://hdl.handle.net/1912/3407 en_US eng American Geophysical Union https://doi.org/10.1029/2007GB002958 Global Biogeochemical Cycles 22 (2008): GB3007 https://hdl.handle.net/1912/3407 doi:10.1029/2007GB002958 Global Biogeochemical Cycles 22 (2008): GB3007 doi:10.1029/2007GB002958 Atmospheric carbon Preformed nutrients Remineralized nutrients Article 2008 ftwhoas https://doi.org/10.1029/2007GB002958 2022-05-28T22:57:58Z Author Posting. © American Geophysical Union, 2008. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Global Biogeochemical Cycles 22 (2008): GB3007, doi:10.1029/2007GB002958. We use both theory and ocean biogeochemistry models to examine the role of the soft-tissue biological pump in controlling atmospheric CO2. We demonstrate that atmospheric CO2 can be simply related to the amount of inorganic carbon stored in the ocean by the soft-tissue pump, which we term (OCS soft ). OCS soft is linearly related to the inventory of remineralized nutrient, which in turn is just the total nutrient inventory minus the preformed nutrient inventory. In a system where total nutrient is conserved, atmospheric CO2 can thus be simply related to the global inventory of preformed nutrient. Previous model simulations have explored how changes in the surface concentration of nutrients in deepwater formation regions change the global preformed nutrient inventory. We show that changes in physical forcing such as winds, vertical mixing, and lateral mixing can shift the balance of deepwater formation between the North Atlantic (where preformed nutrients are low) and the Southern Ocean (where they are high). Such changes in physical forcing can thus drive large changes in atmospheric CO2, even with minimal changes in surface nutrient concentration. If Southern Ocean deepwater formation strengthens, the preformed nutrient inventory and thus atmospheric CO2 increase. An important consequence of these new insights is that the relationship between surface nutrient concentrations, biological export production, and atmospheric CO2 is more complex than previously predicted. Contrary to conventional wisdom, we show that OCS soft can increase and atmospheric CO2 decrease, while surface nutrients show minimal change and export production decreases. While at MIT, I.M. was supported by the NOAA Postdoctoral Program in Climate and Global Change, ... Article in Journal/Newspaper North Atlantic Southern Ocean Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Southern Ocean Global Biogeochemical Cycles 22 3 n/a n/a |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Atmospheric carbon Preformed nutrients Remineralized nutrients |
spellingShingle |
Atmospheric carbon Preformed nutrients Remineralized nutrients Marinov, Irina Gnanadesikan, Anand Sarmiento, Jorge L. Toggweiler, J. R. Follows, Michael J. Mignone, B. K. Impact of oceanic circulation on biological carbon storage in the ocean and atmospheric pCO2 |
topic_facet |
Atmospheric carbon Preformed nutrients Remineralized nutrients |
description |
Author Posting. © American Geophysical Union, 2008. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Global Biogeochemical Cycles 22 (2008): GB3007, doi:10.1029/2007GB002958. We use both theory and ocean biogeochemistry models to examine the role of the soft-tissue biological pump in controlling atmospheric CO2. We demonstrate that atmospheric CO2 can be simply related to the amount of inorganic carbon stored in the ocean by the soft-tissue pump, which we term (OCS soft ). OCS soft is linearly related to the inventory of remineralized nutrient, which in turn is just the total nutrient inventory minus the preformed nutrient inventory. In a system where total nutrient is conserved, atmospheric CO2 can thus be simply related to the global inventory of preformed nutrient. Previous model simulations have explored how changes in the surface concentration of nutrients in deepwater formation regions change the global preformed nutrient inventory. We show that changes in physical forcing such as winds, vertical mixing, and lateral mixing can shift the balance of deepwater formation between the North Atlantic (where preformed nutrients are low) and the Southern Ocean (where they are high). Such changes in physical forcing can thus drive large changes in atmospheric CO2, even with minimal changes in surface nutrient concentration. If Southern Ocean deepwater formation strengthens, the preformed nutrient inventory and thus atmospheric CO2 increase. An important consequence of these new insights is that the relationship between surface nutrient concentrations, biological export production, and atmospheric CO2 is more complex than previously predicted. Contrary to conventional wisdom, we show that OCS soft can increase and atmospheric CO2 decrease, while surface nutrients show minimal change and export production decreases. While at MIT, I.M. was supported by the NOAA Postdoctoral Program in Climate and Global Change, ... |
format |
Article in Journal/Newspaper |
author |
Marinov, Irina Gnanadesikan, Anand Sarmiento, Jorge L. Toggweiler, J. R. Follows, Michael J. Mignone, B. K. |
author_facet |
Marinov, Irina Gnanadesikan, Anand Sarmiento, Jorge L. Toggweiler, J. R. Follows, Michael J. Mignone, B. K. |
author_sort |
Marinov, Irina |
title |
Impact of oceanic circulation on biological carbon storage in the ocean and atmospheric pCO2 |
title_short |
Impact of oceanic circulation on biological carbon storage in the ocean and atmospheric pCO2 |
title_full |
Impact of oceanic circulation on biological carbon storage in the ocean and atmospheric pCO2 |
title_fullStr |
Impact of oceanic circulation on biological carbon storage in the ocean and atmospheric pCO2 |
title_full_unstemmed |
Impact of oceanic circulation on biological carbon storage in the ocean and atmospheric pCO2 |
title_sort |
impact of oceanic circulation on biological carbon storage in the ocean and atmospheric pco2 |
publisher |
American Geophysical Union |
publishDate |
2008 |
url |
https://hdl.handle.net/1912/3407 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
North Atlantic Southern Ocean |
genre_facet |
North Atlantic Southern Ocean |
op_source |
Global Biogeochemical Cycles 22 (2008): GB3007 doi:10.1029/2007GB002958 |
op_relation |
https://doi.org/10.1029/2007GB002958 Global Biogeochemical Cycles 22 (2008): GB3007 https://hdl.handle.net/1912/3407 doi:10.1029/2007GB002958 |
op_doi |
https://doi.org/10.1029/2007GB002958 |
container_title |
Global Biogeochemical Cycles |
container_volume |
22 |
container_issue |
3 |
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n/a |
op_container_end_page |
n/a |
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1766135588400922624 |