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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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Krishnamurti et al. (1975) studied this question.
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