A first estimate of present and preindustrial air-sea CO2 flux patterns based on ocean interior carbon measurements and models

Details A first estimate of present and preindustrial air-sea CO2 flux patterns based on ocean interior carbon measurements and models A first estimate of present and preindustrial air-sea CO2 flux patterns based on ocean interior carbon measurements and models

Jan 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30a..10g&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 1, pp. 10-1, CiteID 1010, DOI 10.1029/2002GL015594

Mathematics

Logic

35

Oceanography: Biological And Chemical: Carbon Cycling, Oceanography: Biological And Chemical: Biogeochemical Cycles (1615), Global Change: Oceans (4203), Oceanography: Biological And Chemical: Modeling

Scientific paper

The exchange of CO2 across the air-sea interface is a main determinant of the distribution of atmospheric CO2 from which major conclusions about the carbon cycle are drawn, yet our knowledge of atmosphere-ocean fluxes still has major gaps. A new analysis based on recent ocean dissolved inorganic carbon data and on models permits us to separately estimate the preindustrial and present air-sea CO2 flux distributions without requiring knowledge of the gas exchange coefficient. We find a smaller carbon sink at mid to high latitudes of the southern hemisphere than previous data based estimates and a shift of ocean uptake to lower latitude regions compared to estimates and simulations. The total uptake of anthropogenic CO2 for 1990 is 1.8 (+/-0.4) Pg C yr-1. Our ocean based results support the interpretation of the latitudinal distribution of atmospheric CO2 data as evidence for a large northern hemisphere land carbon sink.

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