ヒマラヤ周辺の気象について

Abstract

The history of the studies on the climate of the Himalayas is summarized. There are manyreports of the synoptic analysis of the monsoon over India, but there are few such reports ofthe climate of the Himalayas. We have a weather station at Lhajung (4420m) in Khumbu Himal.The meteorological data from April 1973 to March 1975 are analysed. Influences of theTibetan High and the Subtropical jet stream are discussed. The relation between the climaticconditions and theg rowth of the glaciers are also discussed. Photographs of the cloudsoverKhumbu Himal were taken by 8mm time-lapse camera in winter season. The thick-ness of thevalley wind is 2ｰ0-300m according to the analysis of the photogrpahs. Spectral analysis wasperformed on records of the daily precipitation during the monsoon season of 1973 at stationsin the Nepal Himalaya. Through power spectral analysis, predominant periodicities of about10 days and 5 days are found.