PMID: 11607736Aug 5, 1997Paper

Global air-sea flux of CO2: an estimate based on measurements of sea-air pCO2 difference

Proceedings of the National Academy of Sciences of the United States of America
T TakahashiT T Takahashi

Abstract

Approximately 250,000 measurements made for the pCO2 difference between surface water and the marine atmosphere, DeltapCO2, have been assembled for the global oceans. Observations made in the equatorial Pacific during El Nino events have been excluded from the data set. These observations are mapped on the global 4 degrees x 5 degrees grid for a single virtual calendar year (chosen arbitrarily to be 1990) representing a non-El Nino year. Monthly global distributions of DeltapCO2 have been constructed using an interpolation method based on a lateral advection-diffusion transport equation. The net flux of CO2 across the sea surface has been computed using DeltapCO2 distributions and CO2 gas transfer coefficients across sea surface. The annual net uptake flux of CO2 by the global oceans thus estimated ranges from 0.60 to 1.34 Gt-Cyr-1 depending on different formulations used for wind speed dependence on the gas transfer coefficient. These estimates are subject to an error of up to 75% resulting from the numerical interpolation method used to estimate the distribution of DeltapCO2 over the global oceans. Temperate and polar oceans of the both hemispheres are the major sinks for atmospheric CO2, whereas the equatorial oceans are the...Continue Reading

References

Nov 29, 1995·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·J R Guest
Mar 23, 1990·Science·P P TansT Takahashi
Apr 3, 1992·Science·P D QuayC S Wong

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Citations

Oct 9, 2001·The Science of the Total Environment·D W Dyrssen
Jun 1, 2002·Advances in Space Research : the Official Journal of the Committee on Space Research (COSPAR)·D P Hader
Jul 30, 2008·Proceedings of the National Academy of Sciences of the United States of America·Derek P ManzelloChris Langdon
May 5, 2009·Trends in Ecology & Evolution·R J ScholesJ G Canadell
Mar 11, 2003·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·Andy J Ridgwell
Mar 28, 2003·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Donat-Peter HäderRobert C Worrest
Feb 16, 2007·Chemical Reviews·Frank J Millero

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