Rainfall Variation (IMAGE)

University of Washington

Rainfall Variation

Caption

Satellite data over the tropics, between 10 degrees S and 10 degrees N, shows a slight dip in rainfall when the moon is directly overhead or underfoot. The top panel shows the air pressure, the middle shows the rate of change in air pressure, and the bottom shows the rainfall difference from the average. The change is 0.78 micrometers, or less than one ten thousandth of an inch, per hour.

Credit

Tsubasa Kohyama/University of Washington

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