西北地区春季沙尘暴地面加热场基本特征  

The Basic Characteristics of Surface Heating Field in Spring Sand-dust Storms in North-west China

作　　者：王劲松[1] 刘贤 

机构地区：[1]中国气象局兰州干旱气象研究所 [2]武威地区气象局,甘肃武威733000

出　　处：《干旱区资源与环境》2003年第5期1-6,共6页Journal of Arid Land Resources and Environment

基　　金：科技部 2 0 0 0年公益类研究项目"西北干旱区沙尘暴气候背景及气候预测方法研究"资助

摘　　要：利用 NCEP/NCAR1 958-2 0 0 0年月平均全球再分析网格点资料 ,对西北地区春季典型沙尘暴年和典型非沙尘暴年的感热通量场、潜热通量场的差异进行了对比分析 ,找出了感热和潜热通量场与沙尘暴发生的关系。结果表明 ,春季典型沙尘暴年中沙尘暴发生区上游和西北区东侧是影响沙尘暴发生的关键区。西北地区春季典型沙尘暴年上游区为热汇区 ,沙尘暴发生区主要为热源区。Using the global monthly reanalysis grid data of NCEP/NCAR (1958-2000),the comparative analysis of discrepancy was done between the canonical and non-canonical sand-dust storms years in spring about sensible heat flux and latent heat flux in north-west China, and the relationship between sand-dust storms and sensible heat flux and latent heat flux was found. The results showed that the upstream area and east of the north-west area were the key regions of affecting occurrence of sand-dust storms in spring in canonical years. The upstream area was a heat sink area and the sand-dust storm area was a heat source area.

关 键 词：西北地区 春季 沙尘暴 地面加热场 特征 感热通量场 潜热通量场 热源区 

分 类 号：P425.55[天文地球—大气科学及气象学]