Another Comment on “Peculiar Downward Water Vapor Flux over Gobi Desert in the Daytime”

Abstract

The downward water vapor flux over deserts in the daytime has been observed by many scientists including Wang and Mitsuta (1990). Tsukamoto (1993) pointed out the importance of density correction to flux measurements and showed that the magnitude of the water vapor flux measurements made by Wang and Mitsuta should be reduced by about 22%, but the direction was still downward. The present authors discuss this problem from the viewpoint of the behavior of water vapor near the ground surface and arrive at the conclusion that the analysis of the problem must take into consideration water vapor advection if correct conclusions are to be drawn.