On the Energy Exchange between Sea Surface and the Air

[摘要] Around the Japan Islands, sometimes the cold monsoon from Siberia blows on the warm sea surface in winter. It causes a large amount of snowfall in the mountain region of Central Japan. At this time, the temperature difference between sea surface and air above it is very large and wind velocity is fairly high, so that the transformation of the monsoon air mass is very quick. Perhaps such a meteorological condition is rare all over the world. Previously the author calculated the differences of moistures and those of sensible heat energies in the atmospheric columns between two stations which lie on both sides of the Japan Sea. But marine and upper air data were not very accurate. On this paper, he treats more accurate data at the two stations, Kagoshima and Tango (ship observation), and on the sea surface of the Pacific Ocean. Then he trys to determine the coefficient k in the following evaporation equation used generally; E=k(es-ea)U where E: evaporation, es: saturated vapor pressure at sea surface temperature, ea: vapor pressure in the air, and U: wind velocity. The value of k obtained by this method is in good agreement with that by Jacobs.

[学科分类] 大气科学