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Article
Air-sea CO2 fluxes along the coast of Chile: from CO2 outgassing in central northern upwelling waters to CO2 uptake in southern Patagonian fjords
Journal of Geophysical Research
  • Rodrigo Torres, Universidad Austral de Chile
  • Silvio Pantoja, Universidad de Concepción
  • Naomi Harada, Japan Agency for Marine-Earth Science and Technology Center
  • Humberto E González, Universidad Austral de Chile
  • Giovanni Daneri, Universidad Austral de Chile
  • Máximo Frangopulos, Centro de Estudios del Cuaternario de Fuego-Patagonia
  • José A Rutlant, Universidad de Chile
  • Carlos M Duarte, Instituto Mediterráneo de Estudios Avanzados
  • Sergio Ruiz-Halpern, Instituto Mediterráneo de Estudios Avanzados
  • Eva Mayol, Pontificia Universidad Católica de Chile
  • Masao Fukasawa, Japan Agency for Marine-Earth Science and Technology Center
Document Type
Article
Publication Date
1-1-2011
Peer Reviewed
Peer-Reviewed
Abstract
Carbon system parameters measured during several expeditions along the coast of Chile (23°S–56°S) have been used to show the main spatial and temporal trends of air-sea CO2 fluxes in the coastal waters of the eastern South Pacific. Chilean coastal waters are characterized by strong pCO2 gradients between the atmosphere and the surface water, with high spatial and temporal variability. On average, the direction of the carbon flux changes from CO2 outgassing at the coastal upwelling region to CO2 sequestering at the nonupwelling fjord region in Chilean Patagonia. Estimations of surface water pCO2 along the Patagonian fjord region showed that, while minimum pCO2 levels (strong CO2 undersaturation) occurs during the spring and summer period, maximum levels (including CO2supersaturation) occur during the austral winter. CO2 uptake in the Patagonia fjord region during spring-summer is within the order of −5 mol C m−2 yr−1, indicating a significant regional sink of atmospheric CO2 during that season. We suggest that the CO2 sink at Patagonia most probably exceeds the CO2 source exerted by the coastal upwelling system off central northern Chile.
Citation Information

Torres, R, Pantoja, S, Harada, N, González, HE, Daneri, G, Frangopulos, M, Rutlant, JA, Duarte, CM, Ruiz-Halpern, S, Mayo, E & Fukasawa, M 2011, ' Air-sea CO2 fluxes along the coast of Chile: from CO2 outgassing in central northern upwelling waters to CO2 uptake in southern Patagonian fjords',

Published version available from:

http://doi.org/10.1029/2010JC006344