AustralieFrV1, Main, Exploration, bibRecord, 008442

Carbon dioxide fluxes in the Benguela upwelling system during winter and spring: A comparison between 2005 and 2006

Identifieur interne : 008442 ( Main/Exploration ); précédent : 008441; suivant : 008443

Carbon dioxide fluxes in the Benguela upwelling system during winter and spring: A comparison between 2005 and 2006

Auteurs : J. Magdalena Santana-Casiano [Espagne] ; Melchor Gonzalez-Davila [Espagne] ; Ivan R. Ucha [Espagne]

Source :

Deep-sea research. Part 2. Topical studies in oceanography [ 0967-0645 ] ; 2009.

RBID : Pascal:09-0358071

Descripteurs français

Pascal (Inist)
- Dioxyde carbone, Dioxyde de carbone, Upwelling, Hiver, Source, Printemps, Eau mer, Atmosphère, Variabilité, Filament, Complexité, Dynamique, Température, Zone frontale atmosphère océan, Régression linéaire multiple, Trajectoire, Gaz effet serre, Namibie.
Wicri :
- geographic : Namibie.
- topic : Atmosphère.

English descriptors

KwdEn :
- Carbon dioxide, Complexity, Filament, Frontal zone, Multiple linear regression, Namibia, Spring(season), Winter, atmosphere, carbon dioxide, dynamics, greenhouse gas, sea water, springs, temperature, trajectory, upwelling, variability.

Abstract

The distributions of fCO₂ in surface seawater and in the atmosphere were studied in the Benguela Province (14-33°S) during the austral winter and spring 2005 and 2006. High fCO_2sw variability was observed due to the effect of upwelled and derived meso-scale structures such as filament water. The complexity of the system, dominated by the upwelling dynamics, produces both a general decrease in fCO_2sw with temperature (16μatm/°C) and negative temperature fCO_2sw relationship due to the presence of upwelling, filaments, and frontal zones. Multiple linear regressions are unable to capture the resulting variability in fCO₂ in the area. CO₂ fluxes over the cruise track varied from Northern Namibia to the Southern Benguela regions. The northern system (14-20°S) is oversaturated in CO₂ relative to the atmosphere, and presents an average flux of 0.56 mol m^-2yr^-1. The southern part (20°S-33°S) of the Benguela system is undersaturated in CO₂, and the average flux is -1.62 mol m^-2yr^-1. This study describes an intensive upwelling area, acting as a sink for CO₂ in winter and spring.

Affiliations:

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Le document en format XML

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<term>Complexity</term>
<term>Filament</term>
<term>Frontal zone</term>
<term>Multiple linear regression</term>
<term>Namibia</term>
<term>Spring(season)</term>
<term>Winter</term>
<term>atmosphere</term>
<term>carbon dioxide</term>
<term>dynamics</term>
<term>greenhouse gas</term>
<term>sea water</term>
<term>springs</term>
<term>temperature</term>
<term>trajectory</term>
<term>upwelling</term>
<term>variability</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Dioxyde carbone</term>
<term>Dioxyde de carbone</term>
<term>Upwelling</term>
<term>Hiver</term>
<term>Source</term>
<term>Printemps</term>
<term>Eau mer</term>
<term>Atmosphère</term>
<term>Variabilité</term>
<term>Filament</term>
<term>Complexité</term>
<term>Dynamique</term>
<term>Température</term>
<term>Zone frontale atmosphère océan</term>
<term>Régression linéaire multiple</term>
<term>Trajectoire</term>
<term>Gaz effet serre</term>
<term>Namibie</term>
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<front><div type="abstract" xml:lang="en">The distributions of fCO<sub>2</sub>
 in surface seawater and in the atmosphere were studied in the Benguela Province (14-33°S) during the austral winter and spring 2005 and 2006. High fCO<sub>2sw</sub>
 variability was observed due to the effect of upwelled and derived meso-scale structures such as filament water. The complexity of the system, dominated by the upwelling dynamics, produces both a general decrease in fCO<sub>2sw</sub>
 with temperature (16μatm/°C) and negative temperature fCO<sub>2sw</sub>
 relationship due to the presence of upwelling, filaments, and frontal zones. Multiple linear regressions are unable to capture the resulting variability in fCO<sub>2</sub>
 in the area. CO<sub>2</sub>
 fluxes over the cruise track varied from Northern Namibia to the Southern Benguela regions. The northern system (14-20°S) is oversaturated in CO<sub>2</sub>
 relative to the atmosphere, and presents an average flux of 0.56 mol m<sup>-2</sup>
yr<sup>-1</sup>
. The southern part (20°S-33°S) of the Benguela system is undersaturated in CO<sub>2</sub>
, and the average flux is -1.62 mol m<sup>-2</sup>
yr<sup>-1</sup>
. This study describes an intensive upwelling area, acting as a sink for CO<sub>2</sub>
 in winter and spring.</div>
</front>
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<affiliations><list><country><li>Espagne</li>
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<tree><country name="Espagne"><region name="Canaries"><name sortKey="Magdalena Santana Casiano, J" sort="Magdalena Santana Casiano, J" uniqKey="Magdalena Santana Casiano J" first="J." last="Magdalena Santana-Casiano">J. Magdalena Santana-Casiano</name>
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<name sortKey="Gonzalez Davila, Melchor" sort="Gonzalez Davila, Melchor" uniqKey="Gonzalez Davila M" first="Melchor" last="Gonzalez-Davila">Melchor Gonzalez-Davila</name>
<name sortKey="Ucha, Ivan R" sort="Ucha, Ivan R" uniqKey="Ucha I" first="Ivan R." last="Ucha">Ivan R. Ucha</name>
</country>
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Carbon dioxide fluxes in the Benguela upwelling system during winter and spring: A comparison between 2005 and 2006

Carbon dioxide fluxes in the Benguela upwelling system during winter and spring: A comparison between 2005 and 2006

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