INVESTIGADORES
LUTZ Vivian Alicia
artículos
Título:
Annual balance and seasonal variability of sea-air CO2 fluxes in the Patagonia Sea: Their relationship with fronts and chlorophyll distribution
Autor/es:
BIANCHI, A.A.; RUIZ PINO, D.; ISBERT PERLENDER, H.G.; OSIROFF, A.P.; SEGURA, V.; LUTZ, V.; LUZ CLARA, M.; BALESTRINI, C.F.; PIOLA, A.R.
Revista:
JOURNAL OF GEOPHYSICAL RESEARCH
Editorial:
AMER GEOPHYSICAL UNION
Referencias:
Año: 2009 vol. 114 p. 1 - 11
ISSN:
0148-0227
Resumen:
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Sea-air differences of CO2 partial
pressures (ΔpCO2) and surface chlorophyll a (chl-a)
concentration have been determined during 22 cruises in various seasons for
20002006 over the Patagonia
Sea and shelf break. From
spring to autumn, the nearshore waters act as a source of atmospheric CO2,
while midshelf and slope is a CO2 sink, leading to highly negative
areal means of sea-air CO2 flux and ΔpCO2. The ΔpCO2
and CO2 flux in spring reach values of -67 matm and -7 x 10-3
mol m-2 d-1, respectively, and are close to equilibrium
in winter. Sea-air ΔpCO2 and chl-a over the shelf are
negatively correlated, suggesting that photosynthesis is one of the main
processes responsible for the large CO2 sequestration. The annual
areal mean ΔpCO2 and sea-air CO2 flux are -31 matm and -3.7 x 10-3
mol m-2 d-1, respectively, indicating that the
PatagoniaSea is one of the strongest CO2 sinks per unit area in the World Ocean.
