摘要
本文通过对呼市地区40年气候资料的分析得出:40年来,呼市气温在波动起伏中逐步升高,到80年代后半期达到最高值。其中尤以冬季的增温最为明显;降水量在前期的大起大落后逐步趋于平稳,但总趋势是逐年代减少。气候的变暖,使无霜冻期延长,生长期内积温增加,为农业生产提供了丰富的热量资源,但干旱的加剧,却使农业生产面临严峻的缺水局面。
The result of the analysis on the last 40 years' climatic data of Huhhot region showsSince 1950,the annual mean temperature in Huhhot raised gradually in fluctuation andreached a maximum value in late 1980s.The raising of temperature in winter was more obvi-ously than those in any other seasons;The annual amount of precipitation in Huhhot,afteran acute fluctuation in late 1950s and early 1960s,tended to be steady——approximating tomean value.The general tendency of precipitation is dropping decade after decade.As results of the turning warm of climate,the frost-free period lengthens and the valueof accumulated temperature within growing period increases.It will provide more heat energyfor agriculture production,but the further arid of climate will force the agriculture to face amore severe situation of water-shortage.
关键词
气候变化
历史气候
呼和浩特
Precipitation
departure
accumulated temperature
frost-free period
