东亚地区大气热源(汇)的气候学特征研究

The Climatic Characteristics of Atmospheric Heat Sources /Sinksover the East Asian Region

利用1948—2008年共61年NCEP／NCAR再分析资料对全球的大气热源（汇）统计处理，采用经验正交函数分解方法、气候态平均分析方法，分析了东亚地区的大气热源、热汇的基本气候特征，对61年来东亚地区大气热源热汇各月、各季节的气候态分析，并从全球的大气热源、热汇剖面分析中了解了其变化规律。揭示了全球大范围的大气热源区主要分布在南亚一热带印度洋一热带太平洋的中部和西部两侧、南美洲的赤道及其南侧地区一带，并得出其变化的平均趋势；0—60°N，每10个纬度带内热源、热汇的年变化不仅与全球纬向平均的热源、热汇年变化有非常大的差异，而且亚洲，青藏高原、东亚大陆、西太平洋地区6个平均纬度带之间的差异也非常明显。

The global atmospheric heating sources/sinks 〈 Q1 〉 are calculated from the NCEP/NCAR reanalysis data for 61 a from 1948 to 2008 by the thermodynamic equation, and the basic climatic characteristics and annual variations of 〈 Q1 〉in the East Asian region are examined. The results are as follows ： （ 1 ） The average season, month, and annual variations of the East Asia region, from the graphs we can see The 〈 Q1 〉 in the East Asian monsoon region varies greatly from season to season. （2） the average monthly time-longitude profile in change pictures are drawn.. The annual variations of 〈 Q1 〉are remarkably different in the six Latitude zones of Tibetan Plateau, the EastAsian continent and western Pacific, and have a descriptive analysis of the graphs.