On Simultaneous Surges in the Trades

T. N. Krishnamurti Department of Meteorology, Florida State University, Tallahassee 32306

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Charles E. Levy Department of Meteorology, Florida State University, Tallahassee 32306

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Hua-Lu Pan Department of Meteorology, Florida State University, Tallahassee 32306

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Abstract

In this note we present an interesting phenomenon involving the near-simultaneous intensification and weakening of the trades. The major data source for this study are low-cloud motion vectors obtained from the geosynchronous satellites ATS III and SMS GOES. The observations show that there is a predominant oscillation in the intensity of the trades with a period of roughly two weeks. This strengthening and weakening in this intensity of the trades is noticed throughout the 100 days of the GATE period. A more detailed analysis of the surge in the trades is in preparation.

Abstract

In this note we present an interesting phenomenon involving the near-simultaneous intensification and weakening of the trades. The major data source for this study are low-cloud motion vectors obtained from the geosynchronous satellites ATS III and SMS GOES. The observations show that there is a predominant oscillation in the intensity of the trades with a period of roughly two weeks. This strengthening and weakening in this intensity of the trades is noticed throughout the 100 days of the GATE period. A more detailed analysis of the surge in the trades is in preparation.

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