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Impact of circulation on export production, dissolved organic matter, and dissolved oxygen in the ocean: Results from Phase II of the Ocean Carbon‐cycle Model Intercomparison Project (OCMIP‐2)

Identifieur interne : 009145 ( Main/Exploration ); précédent : 009144; suivant : 009146

Impact of circulation on export production, dissolved organic matter, and dissolved oxygen in the ocean: Results from Phase II of the Ocean Carbon‐cycle Model Intercomparison Project (OCMIP‐2)

Auteurs : R. G. Najjar [États-Unis] ; X. Jin [États-Unis] ; F. Louanchi [Algérie] ; O. Aumont [France] ; K. Caldeira [États-Unis] ; S. C. Doney [États-Unis] ; J. Dutay [France] ; M. Follows [États-Unis] ; N. Gruber [Suisse] ; F. Joos [Suisse] ; K. Lindsay [États-Unis] ; E. Maier-Reimer [Allemagne] ; R. J. Matear [Australie] ; K. Matsumoto [États-Unis] ; P. Monfray [France] ; A. Mouchet [Belgique] ; J. C. Orr [France, Monaco] ; G. Plattner [Suisse] ; J. L. Sarmiento [États-Unis] ; R. Schlitzer [Allemagne] ; R. D. Slater [États-Unis] ; M. Weirig [Allemagne] ; Y. Yamanaka [Japon] ; A. Yool [Royaume-Uni]

Source :

RBID : ISTEX:BAD2F39BF689F44705F29A4D5215E4E249084EBE

Descripteurs français

English descriptors

Abstract

Results are presented of export production, dissolved organic matter (DOM) and dissolved oxygen simulated by 12 global ocean models participating in the second phase of the Ocean Carbon‐cycle Model Intercomparison Project. A common, simple biogeochemical model is utilized in different coarse‐resolution ocean circulation models. The model mean (±1σ) downward flux of organic matter across 75 m depth is 17 ± 6 Pg C yr−1. Model means of globally averaged particle export, the fraction of total export in dissolved form, surface semilabile dissolved organic carbon (DOC), and seasonal net outgassing (SNO) of oxygen are in good agreement with observation‐based estimates, but particle export and surface DOC are too high in the tropics. There is a high sensitivity of the results to circulation, as evidenced by (1) the correlation of surface DOC and export with circulation metrics, including chlorofluorocarbon inventory and deep‐ocean radiocarbon, (2) very large intermodel differences in Southern Ocean export, and (3) greater export production, fraction of export as DOM, and SNO in models with explicit mixed layer physics. However, deep‐ocean oxygen, which varies widely among the models, is poorly correlated with other model indices. Cross‐model means of several biogeochemical metrics show better agreement with observation‐based estimates when restricted to those models that best simulate deep‐ocean radiocarbon. Overall, the results emphasize the importance of physical processes in marine biogeochemical modeling and suggest that the development of circulation models can be accelerated by evaluating them with marine biogeochemical metrics.

Url:
DOI: 10.1029/2006GB002857


Affiliations:


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<title level="j" type="main">Global Biogeochemical Cycles</title>
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<term>Academic press</term>
<term>Algorithm</term>
<term>Annual cycle</term>
<term>Antarctic Ocean</term>
<term>Antarctic Seas</term>
<term>Anthropogenic</term>
<term>Apparent oxygen utilization</term>
<term>Biogeochem</term>
<term>Biogeochemical</term>
<term>Biogeochemistry</term>
<term>Carbon cycle</term>
<term>Carbon export</term>
<term>Carlson</term>
<term>Circulation</term>
<term>Circulation impact</term>
<term>Circulation models</term>
<term>Clim</term>
<term>Climatology</term>
<term>Community production</term>
<term>Compensation depth</term>
<term>Conkright</term>
<term>Cycling</term>
<term>Deep ocean</term>
<term>Dissolved oxygen</term>
<term>Doney</term>
<term>Downward flux</term>
<term>Dutay</term>
<term>Equatorial</term>
<term>Euphotic zone</term>
<term>Export</term>
<term>Export fraction</term>
<term>Export fractions</term>
<term>Export production</term>
<term>Geophys</term>
<term>Global</term>
<term>Global biogeochem</term>
<term>Global export production</term>
<term>Global ocean</term>
<term>Global particle export</term>
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<term>Inverse method</term>
<term>Isop</term>
<term>Keeling</term>
<term>Latitude</term>
<term>Latitude bands</term>
<term>Layer depth</term>
<term>Layer dynamics</term>
<term>Levitus</term>
<term>Louanchi</term>
<term>Marine biogeochemical models</term>
<term>Matsumoto</term>
<term>Metrics</term>
<term>Mikaloff fletcher</term>
<term>Mmol</term>
<term>Model timestep</term>
<term>Modeling</term>
<term>Modeling study</term>
<term>Monthly resolution</term>
<term>Najjar</term>
<term>Nitrogen fixation</term>
<term>Noaa</term>
<term>Noaa atlas nesdis</term>
<term>Npdw</term>
<term>Nutrient</term>
<term>Ocean biogeochemistry</term>
<term>Ocean circulation</term>
<term>Ocean circulation models</term>
<term>Ocean model intercomparison project</term>
<term>Ocean models</term>
<term>Oceanic</term>
<term>Oceanogr</term>
<term>Ocmip models</term>
<term>Organic carbon</term>
<term>Organic matter</term>
<term>Organic phosphorus</term>
<term>Outgassing</term>
<term>Oxygen concentration</term>
<term>Oxygen content</term>
<term>Particle export</term>
<term>Particle flux</term>
<term>Phosphate</term>
<term>Phosphorus</term>
<term>Piub</term>
<term>Primary production</term>
<term>Primary production algorithms</term>
<term>Prin</term>
<term>Prin model</term>
<term>Production zone</term>
<term>Radiocarbon</term>
<term>Radiocarbon content</term>
<term>Reasonable agreement</term>
<term>Redfield</term>
<term>Redfield ratio</term>
<term>Refractory</term>
<term>Refractory component</term>
<term>Remineralization</term>
<term>Sarmiento</term>
<term>Schlitzer</term>
<term>Seasonal variations</term>
<term>Seasonality</term>
<term>Sediment traps</term>
<term>Semilabile</term>
<term>Silver spring</term>
<term>Simple biogeochemical model</term>
<term>Simulation</term>
<term>Southern ocean</term>
<term>Southern subtropics</term>
<term>Subtropics</term>
<term>Surface ocean</term>
<term>Surface phosphate</term>
<term>Surface water</term>
<term>Surface waters</term>
<term>Tajika</term>
<term>Temporal variability</term>
<term>Thermocline</term>
<term>Timescale</term>
<term>Total export</term>
<term>Tracer</term>
<term>Transfer velocity</term>
<term>Tropical export production</term>
<term>Tropics</term>
<term>Unit area</term>
<term>Upper ocean circulation</term>
<term>Upwelling</term>
<term>Water column</term>
<term>Wind speed</term>
<term>Woods hole</term>
<term>World ocean atlas</term>
<term>Yamanaka</term>
<term>biogeochemistry</term>
<term>carbon cycle</term>
<term>correlation</term>
<term>depth</term>
<term>export</term>
<term>global</term>
<term>inventory</term>
<term>models</term>
<term>ocean circulation</term>
<term>organic materials</term>
<term>particles</term>
<term>projects</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr">
<term>Biogéochimie</term>
<term>Circulation océanique</term>
<term>Corrélation</term>
<term>Cycle carbone</term>
<term>Exportation</term>
<term>Inventaire</term>
<term>Matière organique</term>
<term>Mers Antarctiques</term>
<term>Modèle</term>
<term>Modélisation</term>
<term>Monde</term>
<term>Océan Antarctique</term>
<term>Oxygène dissous</term>
<term>Particule</term>
<term>Profondeur</term>
<term>Projet</term>
</keywords>
<keywords scheme="Teeft" xml:lang="en">
<term>Academic press</term>
<term>Algorithm</term>
<term>Annual cycle</term>
<term>Anthropogenic</term>
<term>Apparent oxygen utilization</term>
<term>Biogeochem</term>
<term>Biogeochemical</term>
<term>Biogeochemistry</term>
<term>Carbon cycle</term>
<term>Carbon export</term>
<term>Carlson</term>
<term>Circulation</term>
<term>Circulation impact</term>
<term>Circulation models</term>
<term>Clim</term>
<term>Climatology</term>
<term>Community production</term>
<term>Compensation depth</term>
<term>Conkright</term>
<term>Cycling</term>
<term>Deep ocean</term>
<term>Doney</term>
<term>Downward flux</term>
<term>Dutay</term>
<term>Equatorial</term>
<term>Euphotic zone</term>
<term>Export</term>
<term>Export fraction</term>
<term>Export fractions</term>
<term>Export production</term>
<term>Geophys</term>
<term>Global</term>
<term>Global biogeochem</term>
<term>Global export production</term>
<term>Global ocean</term>
<term>Global particle export</term>
<term>Gnanadesikan</term>
<term>Hansell</term>
<term>Igcr</term>
<term>Initial conditions</term>
<term>Inorganic carbon</term>
<term>Inverse estimates</term>
<term>Inverse method</term>
<term>Isop</term>
<term>Keeling</term>
<term>Latitude</term>
<term>Latitude bands</term>
<term>Layer depth</term>
<term>Layer dynamics</term>
<term>Levitus</term>
<term>Louanchi</term>
<term>Marine biogeochemical models</term>
<term>Matsumoto</term>
<term>Metrics</term>
<term>Mikaloff fletcher</term>
<term>Mmol</term>
<term>Model timestep</term>
<term>Modeling</term>
<term>Modeling study</term>
<term>Monthly resolution</term>
<term>Najjar</term>
<term>Nitrogen fixation</term>
<term>Noaa</term>
<term>Noaa atlas nesdis</term>
<term>Npdw</term>
<term>Nutrient</term>
<term>Ocean biogeochemistry</term>
<term>Ocean circulation</term>
<term>Ocean circulation models</term>
<term>Ocean model intercomparison project</term>
<term>Ocean models</term>
<term>Oceanic</term>
<term>Oceanogr</term>
<term>Ocmip models</term>
<term>Organic carbon</term>
<term>Organic matter</term>
<term>Organic phosphorus</term>
<term>Outgassing</term>
<term>Oxygen concentration</term>
<term>Oxygen content</term>
<term>Particle export</term>
<term>Particle flux</term>
<term>Phosphate</term>
<term>Phosphorus</term>
<term>Piub</term>
<term>Primary production</term>
<term>Primary production algorithms</term>
<term>Prin</term>
<term>Prin model</term>
<term>Production zone</term>
<term>Radiocarbon</term>
<term>Radiocarbon content</term>
<term>Reasonable agreement</term>
<term>Redfield</term>
<term>Redfield ratio</term>
<term>Refractory</term>
<term>Refractory component</term>
<term>Remineralization</term>
<term>Sarmiento</term>
<term>Schlitzer</term>
<term>Seasonal variations</term>
<term>Seasonality</term>
<term>Sediment traps</term>
<term>Semilabile</term>
<term>Silver spring</term>
<term>Simple biogeochemical model</term>
<term>Simulation</term>
<term>Southern ocean</term>
<term>Southern subtropics</term>
<term>Subtropics</term>
<term>Surface ocean</term>
<term>Surface phosphate</term>
<term>Surface water</term>
<term>Surface waters</term>
<term>Tajika</term>
<term>Temporal variability</term>
<term>Thermocline</term>
<term>Timescale</term>
<term>Total export</term>
<term>Tracer</term>
<term>Transfer velocity</term>
<term>Tropical export production</term>
<term>Tropics</term>
<term>Unit area</term>
<term>Upper ocean circulation</term>
<term>Upwelling</term>
<term>Water column</term>
<term>Wind speed</term>
<term>Woods hole</term>
<term>World ocean atlas</term>
<term>Yamanaka</term>
</keywords>
<keywords scheme="Wicri" type="topic" xml:lang="fr">
<term>Climatologie</term>
<term>Exportation</term>
<term>Océan Antarctique</term>
<term>Phosphate</term>
<term>Phosphore</term>
<term>Simulation</term>
<term>Eau superficielle</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front>
<div type="abstract">Results are presented of export production, dissolved organic matter (DOM) and dissolved oxygen simulated by 12 global ocean models participating in the second phase of the Ocean Carbon‐cycle Model Intercomparison Project. A common, simple biogeochemical model is utilized in different coarse‐resolution ocean circulation models. The model mean (±1σ) downward flux of organic matter across 75 m depth is 17 ± 6 Pg C yr−1. Model means of globally averaged particle export, the fraction of total export in dissolved form, surface semilabile dissolved organic carbon (DOC), and seasonal net outgassing (SNO) of oxygen are in good agreement with observation‐based estimates, but particle export and surface DOC are too high in the tropics. There is a high sensitivity of the results to circulation, as evidenced by (1) the correlation of surface DOC and export with circulation metrics, including chlorofluorocarbon inventory and deep‐ocean radiocarbon, (2) very large intermodel differences in Southern Ocean export, and (3) greater export production, fraction of export as DOM, and SNO in models with explicit mixed layer physics. However, deep‐ocean oxygen, which varies widely among the models, is poorly correlated with other model indices. Cross‐model means of several biogeochemical metrics show better agreement with observation‐based estimates when restricted to those models that best simulate deep‐ocean radiocarbon. Overall, the results emphasize the importance of physical processes in marine biogeochemical modeling and suggest that the development of circulation models can be accelerated by evaluating them with marine biogeochemical metrics.</div>
</front>
</TEI>
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<list>
<country>
<li>Algérie</li>
<li>Allemagne</li>
<li>Australie</li>
<li>Belgique</li>
<li>France</li>
<li>Japon</li>
<li>Monaco</li>
<li>Royaume-Uni</li>
<li>Suisse</li>
<li>États-Unis</li>
</country>
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<li>Californie</li>
<li>Canton de Berne</li>
<li>Hambourg</li>
<li>New Jersey</li>
<li>Pennsylvanie</li>
<li>Province de Liège</li>
<li>Région Bretagne</li>
<li>Région wallonne</li>
<li>Wilaya d'Alger</li>
<li>Île-de-France</li>
</region>
<settlement>
<li>Alger</li>
<li>Berne</li>
<li>Brest</li>
<li>Hambourg</li>
<li>Liège</li>
<li>Los Angeles</li>
<li>Paris</li>
<li>Princeton (New Jersey)</li>
<li>University Park (Pennsylvanie)</li>
</settlement>
<orgName>
<li>Université d'État de Pennsylvanie</li>
<li>Université de Berne</li>
<li>Université de Liège</li>
<li>Université de Princeton</li>
</orgName>
</list>
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<country name="États-Unis">
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<name sortKey="Najjar, R G" sort="Najjar, R G" uniqKey="Najjar R" first="R. G." last="Najjar">R. G. Najjar</name>
</noRegion>
<name sortKey="Caldeira, K" sort="Caldeira, K" uniqKey="Caldeira K" first="K." last="Caldeira">K. Caldeira</name>
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<name sortKey="Follows, M" sort="Follows, M" uniqKey="Follows M" first="M." last="Follows">M. Follows</name>
<name sortKey="Jin, X" sort="Jin, X" uniqKey="Jin X" first="X." last="Jin">X. Jin</name>
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<name sortKey="Matear, R J" sort="Matear, R J" uniqKey="Matear R" first="R. J." last="Matear">R. J. Matear</name>
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<name sortKey="Yamanaka, Y" sort="Yamanaka, Y" uniqKey="Yamanaka Y" first="Y." last="Yamanaka">Y. Yamanaka</name>
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<name sortKey="Yool, A" sort="Yool, A" uniqKey="Yool A" first="A." last="Yool">A. Yool</name>
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</affiliations>
</record>

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