亚洲热带地区对流爆发和推进的气候特征

利用日本ＧＭＳ ＴＢＢ资料和ＧＰＣＰ降水资料，用滑动ｔ－检验法研究了亚洲热带地区春夏季节转换期对流爆发和推进的气候特征。结果表明，亚洲热带地区对流爆发首先于４月中旬发生在中南半岛中部，然后向东缓慢推进。

CLIMATOLOGICAL FEATURES OF CONVECTION ONSET AND ADVANCING OVER ASIAN TROPICAL REGION

Based on the T BB data from Japanese GMS satellite and the GPCP rainfall, movable t test technique is employed to reveal the climatological features of convection onset and advancing over the Asian tropical region during the spring to summer season.Results show that the convection occurs first in the middle Indo China peninsula in mid April,and then slowly advances eastward,expanding to the whole South China Sea in 28th pentad.The convection experiences such a strongly sbrupt change over Asian tropical area during the spring to summer season that the movable t test of the T BB and rainfall exceeds the statistical significance at 0.01 level.It is also found that each subregion has its own center of convection onset,with the northern South China Sea,northeastern Bay of Bengal and northeastern India being the most significant regions.