1979年東亞梅雨期中低緯度大氣垂直模之結構與能量之研究

A Study on the Atmospheric Vertical Structure and Its Energy in Low and Mid-Latitudes during the East Asia Mei-Yu Period in 1979

李汴軍(Beng-Chun Lee)

《大氣科學》 22卷3期 (1994/09) Pp. 417-430

摘要

分析1979年5月和6月從30°E~150°E，0°~60°N範圍內歐洲中期天氣預報中心(ECMWF)III－b三度空間觀測資料之垂直結構，其結果顯示中緯度地區大氣垂直溫度變化較明顯，此現象與東亞梅雨期入梅、出梅前後相吻合。能量百分比顯示，熱帶地區80%能量集中在前四個垂直模內，第一垂直模能量有30天週期趨勢，中緯度地區能量變化有15天週期傾向，副熱帶地區則呈現為過渡地區。熱帶地區以位能為主，副熱帶地區、中緯度地區在第一垂直模以位能居多，動能則在內部模為主要能量。

關鍵字

梅雨期 ； 垂直模能量

並列摘要

This paper is to study the vertical energetic characteristics based on the ECMWF III-b data over 30°E ~ 150°E, 0 ~ 60°N during May and June, 1979. Firstly, the time variations of the vertical temperature profile in mid-latitudes are significantly observed. The major time change is close to that of the onset and recess of the East Asia Mei-Yu seasons. Secondly, Most of the 80 energy stored in the first four vertical modes is dominant over the tropics. The calculated energy shows there are a 30 day period variations for the first vertical mode in the tropics and 15 day period oscillations revealed in internal and first modes of the mid-latitudes. Besides, it appears seemingly a transient belt in the subtropic regions.Potential energy is dominant in the tropics, in the first vertial mode of the subtropics and mid-latitudes. However kinetic energy is most important over the internal modes in the subtropics and mid-latitudes.

並列關鍵字

Mei-Yi period ； Vertical mode energy