Preliminary and novel estimates of CO2 gas transfer using a satellite scatterometer during the 2001GasEx experiment

Darek Bogucki, Mary Elena Carr, William M. Drennan, Peter Woiceshyn, Tetsu Hara, Marjorie Schmeltz

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


The ocean takes up approximately 30% of the annual anthropogenic emissions of CO2. However, the air-sea exchange of carbon dioxide varies by a factor of 2 depending on the formulation of the exchange process. This considerable uncertainty is due in part to the difficulty in parameterizing the gas transfer velocity, k660, usually given as a function of wind speed. Recent field data showed that parametrization using the mean square slope of small scale surface waves provides a more robust strategy to estimate gas transfer (Frew et al. 2004). Here we present a preliminary estimation of the gas transfer velocity as a function of upwind Normalized Radar Cross-Section (NRCS) as measured by the scatterometer QuikSCAT. The gas transfer velocity calculated from upwind NRCS exhibits a quadratic-like dependence at low and intermediate wind speeds (≃6 ms-1). This approach represents a promising new tool to obtain global quasi-synoptic estimates of oceanic uptake of CO2.

Original languageEnglish (US)
Pages (from-to)75-92
Number of pages18
JournalInternational Journal of Remote Sensing
Issue number1
StatePublished - Mar 2010

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)


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