Diurnal Variation of Moisture and Stability Aloft in the Vicinity of San Juan, Puerto Rico

Herbert Riehl University of Chicago

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Average values of moisture and stability for the lower troposphere are computed at three-hourly intervals. Comparison of the diurnal moisture and stability variation with the diurnal rainfall variation does not yield a satisfactory explanation of the latter. Cloud observations, however, suggest an explanation of the precipitation curve, based on the effect of topography on the field of vertical motion.

Average values of moisture and stability for the lower troposphere are computed at three-hourly intervals. Comparison of the diurnal moisture and stability variation with the diurnal rainfall variation does not yield a satisfactory explanation of the latter. Cloud observations, however, suggest an explanation of the precipitation curve, based on the effect of topography on the field of vertical motion.

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