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Abstract:

Sea-air CO2 fluxes (FCO2) in the Patagonian Sea (PS) were studied using observations collected in 2000–2006. Based on the PS frontal structures and the thermal and biological contributions to FCO2 we present a regional subdivision between distinct regimes that provide new insights on the processes that control these fluxes. The coastal regime (CR) is a net source of atmospheric CO2 (4.9 × 10−3 mol m−2 d−1) while the open shelf regime (SHR) is a net CO2 sink (−6.0 × 10−3 mol m−2 d−1). The interface between these two regions closely follows the location of along-shore fronts. In addition, based on the nature of the processes that drive the FCO2, the PS is subdivided between northern (NR) and southern (SR) regions. Both, NR and SR are CO2 sinks, but the CO2 uptake is significantly higher in NR (−6.4 × 10−3 mol m−2 d−1) than in SR (−0.5 × 10−3 mol m−2 d−1). The data reveal a strong seasonality in FCO2. The mean CO2 capture throughout the PS in austral spring is −5.8 × 10−3 mol m−2 d−1, reaching values lower than −50 × 10−3 mol m−2 d−1 in NR, while in winter FCO2 is close to equilibrium in SR. The analysis of the biological and thermal effects (BE and TE, respectively) on seasonal pCO2 variability indicates that regions of CO2 emission are dominated by the TE while regions of CO2 uptake are dominated by the BE. Our results indicate that the biological pump is the dominant process determining the sea-air CO2 flux in the PS. © 2017 The Authors

Registro:

Documento: Artículo
Título:Distribution of sea-air CO2 fluxes in the Patagonian Sea: Seasonal, biological and thermal effects
Autor:Kahl, L.C.; Bianchi, A.A.; Osiroff, A.P.; Pino, D.R.; Piola, A.R.
Filiación:Departamento de Ciencias de la Atmósfera y los Océanos, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
Departamento Oceanografía, Servicio de Hidrografía Naval, Buenos Aires, Argentina
Expérimentation et Approches Numériques, Laboratoire d'Océanographie et du Climat, Université Pierre et Marie Curie, Paris, France
Palabras clave:Biological and thermal effects; Fronts; Patagonian Sea; Sea-air CO2 fluxes; Simpson parameter; Spatial variability; air-sea interaction; biological pump; carbon dioxide; carbon flux; equilibrium; front; parameterization; seasonal variation; seasonality; spatial variation; Atlantic Ocean; Patagonian Sea
Año:2017
Volumen:143
Página de inicio:18
Página de fin:28
DOI: http://dx.doi.org/10.1016/j.csr.2017.05.011
Título revista:Continental Shelf Research
Título revista abreviado:Cont. Shelf Res.
ISSN:02784343
CODEN:CSHRD
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02784343_v143_n_p18_Kahl

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Citas:

---------- APA ----------
Kahl, L.C., Bianchi, A.A., Osiroff, A.P., Pino, D.R. & Piola, A.R. (2017) . Distribution of sea-air CO2 fluxes in the Patagonian Sea: Seasonal, biological and thermal effects. Continental Shelf Research, 143, 18-28.
http://dx.doi.org/10.1016/j.csr.2017.05.011
---------- CHICAGO ----------
Kahl, L.C., Bianchi, A.A., Osiroff, A.P., Pino, D.R., Piola, A.R. "Distribution of sea-air CO2 fluxes in the Patagonian Sea: Seasonal, biological and thermal effects" . Continental Shelf Research 143 (2017) : 18-28.
http://dx.doi.org/10.1016/j.csr.2017.05.011
---------- MLA ----------
Kahl, L.C., Bianchi, A.A., Osiroff, A.P., Pino, D.R., Piola, A.R. "Distribution of sea-air CO2 fluxes in the Patagonian Sea: Seasonal, biological and thermal effects" . Continental Shelf Research, vol. 143, 2017, pp. 18-28.
http://dx.doi.org/10.1016/j.csr.2017.05.011
---------- VANCOUVER ----------
Kahl, L.C., Bianchi, A.A., Osiroff, A.P., Pino, D.R., Piola, A.R. Distribution of sea-air CO2 fluxes in the Patagonian Sea: Seasonal, biological and thermal effects. Cont. Shelf Res. 2017;143:18-28.
http://dx.doi.org/10.1016/j.csr.2017.05.011