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Consider a wind of 10ms-1 that is westerly for half of the month and easterly for the other half. The average U wind (and V wind) component is zero but the average (mean) wind speed is 10ms-1.
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Consider a wind of 10ms-1 that is westerly for half of the month and easterly for the other half. The average U wind (and V wind) component is zero but the average (mean) wind speed is 10ms-1.
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