RAINFALL ON THE SEA: SURFACE RENEWALS AND WAVE DAMPING

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Abstract

Rainfall on the sea surface causes a variety of effects on the molecular boundary layers. Two such effects are the reduction of the surface renewal time period and the damping of short gravity waves being responsible for wave breaking at higher wave frequencies. The effects described recently by Schlüssel et al. are revaluated in order to fully include the varying raindrop velocity. New parameterizations are derived, which differ from the previous ones, and a substantially higher kinetic energy flux due to rain is found. The general conclusions about the impact on the thermal molecular boundary do not change, although we point to several minor errors in the calculations of Schlüssel et al. (1997).

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