NissirosV1, Main, Exploration, bibRecord, 000052

Research Spotlight: Simulating ocean carbon storage during the Last Glacial Maximum

Identifieur interne : 000052 ( Main/Exploration ); précédent : 000051; suivant : 000053

Research Spotlight: Simulating ocean carbon storage during the Last Glacial Maximum

Auteurs : Ernie Tretkoff [États-Unis]

Source :

Eos, Transactions American Geophysical Union [ 0096-3941 ] ; 2011-03-08.

RBID : ISTEX:63DA1D22359AA076C852ACCDE2F8C89A1A18293D

Descripteurs français

Wicri :
- topic : Arctique, Changement climatique.

English descriptors

KwdEn :
- Arctic, Arctic ocean, Arctic summer, Carbon cycle, Climate change, Climate models, Cultural legitimacy, Exergy, Geophysical, Geophysical research letters, Global carbon cycle, Goce, Gravity field, Greenhouse gases, Life cycle assessment, Lower atmosphere, Nitric, Nitric oxide, Nitric oxide emissions, Ocean currents.
Teeft :
- Arctic, Arctic ocean, Arctic summer, Carbon cycle, Climate change, Climate models, Cultural legitimacy, Exergy, Geophysical, Geophysical research letters, Global carbon cycle, Goce, Gravity field, Greenhouse gases, Life cycle assessment, Lower atmosphere, Nitric, Nitric oxide, Nitric oxide emissions, Ocean currents.

Abstract

During the cold period of the Last Glacial Maximum, about 21,000 years ago, atmospheric carbon dioxide (CO2)concentration was about 190 parts per million, compared to 280 parts per million in the preindustrial era and about 385 parts per million today. While less carbon was stored in the atmosphere during the Last Glacial Maximum, the oceans probably held more carbon. Atmospheric carbon isotope ratios (δ13C) were similar to today's values, but the oceans had a steeper surface‐to‐deep gradient in δ13C. Previous simulations had trouble simulating simultaneously atmospheric CO2 levels and oceanic δ13C. To reconcile both data, Bouttes et al. ran simulations including a new combination of three mechanisms: brine‐induced ocean stratification, stratification‐dependent diffusion, and iron fertilization. Including these effects made it possible to account for the recorded glacial carbon cycle changes, reconciling the Last Glacial Maximum δ13C values and atmospheric CO2 levels. (Geophysical Research Letters, doi:10.1029/2010GL044499, 2011)

Url:

https://api.istex.fr/document/63DA1D22359AA076C852ACCDE2F8C89A1A18293D/fulltext/pdf

DOI: 10.1029/2011EO100011

Affiliations:

États-Unis

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Le document en format XML

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<front><div type="abstract">During the cold period of the Last Glacial Maximum, about 21,000 years ago, atmospheric carbon dioxide (CO2)concentration was about 190 parts per million, compared to 280 parts per million in the preindustrial era and about 385 parts per million today. While less carbon was stored in the atmosphere during the Last Glacial Maximum, the oceans probably held more carbon. Atmospheric carbon isotope ratios (δ13C) were similar to today's values, but the oceans had a steeper surface‐to‐deep gradient in δ13C. Previous simulations had trouble simulating simultaneously atmospheric CO2 levels and oceanic δ13C. To reconcile both data, Bouttes et al. ran simulations including a new combination of three mechanisms: brine‐induced ocean stratification, stratification‐dependent diffusion, and iron fertilization. Including these effects made it possible to account for the recorded glacial carbon cycle changes, reconciling the Last Glacial Maximum δ13C values and atmospheric CO2 levels. (Geophysical Research Letters, doi:10.1029/2010GL044499, 2011)</div>
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Research Spotlight: Simulating ocean carbon storage during the Last Glacial Maximum

Research Spotlight: Simulating ocean carbon storage during the Last Glacial Maximum

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri