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  The wind-driven, subtropical gyres and the solubility pump of CO2

Follows, M., Ito, T., & Marotzke, J. (2002). The wind-driven, subtropical gyres and the solubility pump of CO2. Global Biogeochemical Cycles, 16(4): 1113. doi:10.1029/2001GB001786.

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GBC-16-2002-60-1.pdf (Verlagsversion), 2MB
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 Urheber:
Follows, MJ1, Autor
Ito, T1, Autor
Marotzke, Jochem1, Autor           
Affiliations:
1external, ou_persistent22              

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Schlagwörter: NORTH-ATLANTIC; ATMOSPHERIC CO2; OCEAN; CIRCULATION; VENTILATION; THERMOCLINE; CARBONEnvironmental Sciences & Ecology; Geology; Meteorology & Atmospheric Sciences; subtropical gyre; CO2; ocean-atmosphere; carbon cycle; wind stress;
 Zusammenfassung: [1] Using a suite of abiotic, ocean-atmosphere, carbon cycle models we demonstrate that the representation of the ventilated thermocline leads to a significant enhancement of the sensitivity of atmospheric pCO(2) to subtropical surface ocean properties. In particular, we study an idealized sector, ocean circulation and abiotic carbon cycle model with a coupled atmospheric reservoir and examine the solubility pump of CO2 in the subtropical oceans. We compare solutions for atmospheric pCO(2) when driven only by buoyancy forces to those with both buoyancy and wind stress forcing. Introducing the wind stress leads to the formation of a subtropical gyre and the warm lens of the ventilated thermocline. This lens is depleted in carbon relative to the surrounding waters since its properties are inherited from the warm, subtropical surface ocean. It is undersaturated in carbon since subduction quickly follows the strong cooling in the western boundary current before equilibration with the overlying atmosphere can occur. Plausible wind stress patterns increase atmospheric pCO(2), relative to the case without wind forcing, and double the sensitivity of atmospheric pCO(2) to perturbations of the low latitude surface carbon system properties. We suggest that it is the resolution of the ventilated thermocline in global, three-dimensional, ocean circulation models that enhances their sensitivity of atmospheric pCO(2) to warm surface water properties relative to highly idealized box models.

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Sprache(n): eng - English
 Datum: 20022002
 Publikationsstatus: Erschienen
 Seiten: 9
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: ISI: 000181062500002
DOI: 10.1029/2001GB001786
Anderer: A [38]
 Art des Abschluß: -

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Titel: Global Biogeochemical Cycles
  Andere : Glob. Biogeochem. Cycle
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Washington, DC : American Geophysical Union
Seiten: - Band / Heft: 16 (4) Artikelnummer: 1113 Start- / Endseite: - Identifikator: ISSN: 0886-6236
CoNE: https://pure.mpg.de/cone/journals/resource/954925553383