摘要
采用钱永甫（１９８５）模式与颜宏（１９８７）模式嵌套，并引入修正的青藏高原雪盖下垫面下的反照率参数化，来研究理想状态下青藏高原东部及南侧夏季有雪盖对东亚大气环流的影响。结果表明，模式大气对夏季高原雪盖引起的热力异常非常敏感，在高原雪盖影响下，（１）高原地区对流层上层高度场降低，下层高度场升高，而我国东部地区高度场变化与此相反；（２）对流层下部东亚大部分地区出现冷夏，东亚夏季风环流减弱；（３）高原东部至沿海地区及日本南部降水明显减少，而黄淮下游、新疆北部降水增多。
A numerical experiment was conducted in terms of a nested mode composed of Qian′s prototype(1985)and Yan′s model(1987)with an improved snowcover albedo parameterization scheme introduced to investigated effect on east Asian atmospheric circulations of east/south in summer. Tibetan snow cover available in summer in an idealized condition. Evidence suggests that the model atmosphere is highly sensitive to the covercaused thermal anomaly: the lowlevel altitude (the upper level altitude) is heightened (lowered) as opposed to the change in the corresponding surfaces in east China; cool summer and weakend summer monsoon circulation occur in much of east Asia; rainfall is greatly reduced from east China to south Janpan in contrast to the coastwise HuangheHuaihe plains and northern Xinjiang.
出处
《南京气象学院学报》
CSCD
1997年第4期453-459,共7页
Journal of Nanjing Institute of Meteorology
基金
国家自然科学基金
关键词
雪盖
青藏高原
大气环流
数值试验
snow cover,Tibetan Plateau,atmospheric circulation,numerical experiment
