Where is ENSO stress balanced?

Atmospheric Science Letters - Tập 5 - Trang 13-22 - 2004
Matthias Münnich1, J.David Neelin1
1Department of Atmospheric Sciences, Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1565, USA

Tóm tắt

AbstractThe zonal surface torque budget associated with the tropical wind stress anomalies during El Niño/Southern Oscillation is analyzed. Mountain and surface stress torques over South America are found to play a prominent role. Local momentum change is negligible for 6 month averages allowing the balance among regional contributions to the torque anomalies to be compared. During El Niño, eastward torque anomalies over the central equatorial Pacific are largely compensated by westward anomalies elsewhere in the equatorial band, notably over South America. Torque anomalies over South America and the Pacific in latitude bands north and south of the equator are both westward and are not compensated within the band, implying an export of eastward momentum to higher latitudes. Copyright © 2003 Royal Meteorological Society. Published by Elsevier Ltd. All rights reserved.

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Atmospheric Science Letters

Tập 5

13-22

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