1982—1983年冬季青藏高原地面加热场各分量的谱分析

SPECTRA ANALYSIS OF SURFACE HEAT SOURCE DURING 1982-1983 WINTER OVER QINGHAI-XIZANG PLATEAU

本文所用资料为1982年11月1日至1983年2月28日青藏高原热源考察资料,对改则、拉萨、那曲,甘孜四站的地面热源各分量进行最大熵谱分析。结果表明:地面热源各分量有准两周和准一周周期,由夏至冬地面热源各分量的周期转长。

Maximum entropy spectra method (MEM) has been used to study the surface heat source intensity(B-H), latent heat flux(LE), surface heat fiux(H) and sensible heat flux by using the data observed at Gerze, Lhasa, Nagqu, Garze stations of Qinghai-Xizang Plateau duing the period form 1 Nov. 1982 to 28. Feb. 1983. The results as follows: There are the cyeles of quasi-two weeks and quasi-week for each components of heat flux, the cycle bcomes longer from Summer to Winter.