西北地区一次沙尘暴过程的地表热通量特征  

Basic Characteristics of Surface Heating Flux During a Spring Dust Storm Process in North-west China

作　　者：吕萍[1,2] 

机构地区：[1]中国气象局兰州干旱气象研究所,甘肃兰州730020 [2]兰州大学大气科学学院,甘肃兰州730000

出　　处：《干旱气象》2009年第3期250-253,共4页Journal of Arid Meteorology

基　　金：干旱气象科学研究基金(IAM200813)项目;国家自然科学基金(40871003)共同资助

摘　　要：利用NCEP日平均全球再分析网格点资料,对我国西北地区晴天日与沙尘暴日地表感热通量及潜热通量的差异进行了对比分析。结果表明:沙尘暴爆发前和爆发时,地表感热通量迅速增大,潜热通量急剧减小,地面空气处于一种干热状态,为一热源区,有能量的散失。Based on the global daily reanalysis grid data of NCEP, the comparative analysis of discrepancy was done between the sunny day and sand - dust day about sensible heat flux and latent heat flux in North - west China. The results show that the sensible heat flux increased rapidly, whereas the latent heat flux decreased quickly during the course of dust storm. The air was hot and dry, and the dust storm area was a heat source area.

关 键 词：西北地区 潜热通量 感热通量 

分 类 号：P445.4[天文地球—大气科学及气象学]