近二十年全球变暖背景下东亚地区云量变化特征分析  

TREND OF CLOUD AMOUNT IN EAST ASIA UNDER THE BACKDROP OF GLOBAL WARMING IN THE PAST 20 YEARS

作　　者：吴涧[1] 刘佳 

机构地区：[1]云南大学资源环境与地球科学学院大气科学系,云南昆明650091 [2]红河州气象局,云南蒙自661100

出　　处：《热带气象学报》2011年第4期551-559,共9页Journal of Tropical Meteorology

基　　金：国家重点基础研究发展规划项目(2011CB952003);国家自然科学基金(40975092);云南省自然科学基金(2009CD021);云南省中青年学术和技术带头人后备人才培养计划(2009CI046)共同资助

摘　　要：利用ISCCP的D2云气候资料集,采用趋势分析方法得到了东亚地区1984—2006年各种不同种类云量的变化趋势,并重点分析了全球变暖背景下气温与不同云量变化之间的关系。结果表明:近20年东亚地区总云量和高、低云量呈现波动减少趋势,减少量分别为2.24%、1.65%和1.68%,中云量呈增加趋势,增加量为1.07%;且云量变化存在较大的区域差异。温室效应所导致的东亚地区气温改变和水汽含量变化,是导致云量分布变化的重要原因,在青藏高原、孟加拉湾及热带辐合带区域的气温与高云存在显著负相关,与中、低云存在正相关,而在西太平洋、日本以东以北洋面的气温与低云呈显著负相关,与高云呈正相关。Based on ISCCP D2 data sets over the period of 1984--2006, the change trends of total cloud amount, high cloud amount, middle cloud amount and low cloud amount over Asia are analyzed. Then, in the backdrop of global warming, the correlation between air temperature and change of the cloud amount is mainly discussed. The study has the following results. （1） In East Asia, the total cloud amount, high cloud amount and low cloud amount have a spirally decreasing trend in the past 23 years, with the reduction rate being -2.24%, -1.65% and -1.68% respectively, but the middle cloud amount has been increasing by a rate of 1.07%. （2） It is found from the spatial distribution that the change trends of the cloud amount （of total, high, middle and low levels） are distinctly different in East Asia. （3） The air temperature and water vapor variation are distinctly responsible for the change in the spatial distribution of cloud amount. （4） The correlation is negative between air temperature and high cloud amount but positive between air temperature and low cloud and middle cloud amounts in the Bay of Bengal, Qinghai-Tibet Plateau and subtropical western Pacific.

关 键 词：云量 温室效应 东亚 趋势分析 

分 类 号：P426.53[天文地球—大气科学及气象学]