中文摘要：

20世纪，中国热带气温呈波动上升趋势。在气温波动过程中有2个冷期和2个暖期。最暖的时期为80年代后，这与全球变化相一致，但是昆明最暖的时期为40年代。气候型大多为暖湿同期，这与全国其它区域的状况不同。自然灾害有加剧的趋势：台风次数增多，多台风年洪水多发，旱灾和冷害次数增多，广州曾降微雪，海口和崖县曾见霜，昆明曾有4年强降雪。

英文摘要：

The air temperature appears rising trend in tropic China during the 20th century. Two cooling stages and two warming stages in the process of climatic fluctuation can be recognized. After 1980 ＇s the climate is the most warm which corresponds with the global change,but the most warm period is 1940＇s in Kunming. The climate pattern mostly appears contemporaneity of warming and humidifying, wich is different from the situation of whole China. The natural disasters tend to be aggravaed. Number of typhoon increased. Flood damage occurred frequently in the years with more typhoon. Number of drought and cold damage increased. It snowed in Guangzhou. There was frost in Haikou and Yaxian. Four years of heavy snow have been recorded in Kunming.