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Detailed Reference Information
Small et al. 2005
Small, R.J., Xie, S. and Hafner, J. (2005). Satellite observations of mesoscale ocean features and copropagating atmospheric surface fields in the tropical belt. Journal of Geophysical Research 110: doi: 10.1029/2004JC002598. issn: 0148-0227.

Recent studies of air-sea interaction using satellite data have shown a high positive correlation between wind speed and sea surface temperature (SST) over mesoscale ocean features in certain frontal regions. The aim of this study is to determine to what extent mesoscale ocean dynamics modifies the surface wind speed over the global tropics between 40¿S and 40¿N. Cross-spectral and linear regression methods are used to identify robust relationships between ocean and atmospheric variables. The ocean dynamical features, measured by their sea surface height anomaly (SSHA), affect SST in a manner consistent with advection of the mean temperature gradient by anomalous currents. The response varies from 0.2¿C of SST per cm of SSHA near the equator to 0.05¿C cm-1 at higher latitudes. A remarkably consistent in-phase relationship between SST and wind speed is found over the complete domain. Wind speed response varied from 0.5 to 1.5 ms-1 per ¿C of SST change. This in-phase response of wind speed is consistent with previous studies suggesting that the SST variations cause changes in the vertical exchange of momentum and in the pressure gradient, which alter the wind speed.

BACKGROUND DATA FILES

Abstract

Keywords
Oceanography, Physical, Eddies and mesoscale processes, Oceanography, Physical, Air/sea interactions (0312, 3339), Oceanography, Physical, Upper ocean and mixed layer processes, air-sea interaction, mesoscale eddies, satellite observations
Journal
Journal of Geophysical Research
http://www.agu.org/journals/jb/
Publisher
American Geophysical Union
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