山东省嘉祥县42年气候变化特征

Climate Change Characteristics in Jiaxiang Country of Shandong in the Last 42 Years

根据嘉祥气象站1964～2005年气温及降水资料，从年、季平均气温、平均最高气温、平均最低气温、降水量变化趋势及异常年份的分析等角度对嘉祥42年来的气候变化作了较全面的分析。分析表明：42年来嘉祥县的年平均气温、平均最高气温、平均最低气温都呈上升趋势，20世纪90年代增温尤其明显；各季节气温变化趋势不同，冬季变暖趋势最明显，其中平均最低气温升高最为显著；42年来年降水量呈明显下降趋势。其中20世纪80年代降水量最少。秋季降水呈下降趋势，而冬季在20世纪70年代为多雨期，夏季在80年代为多雨期，春季在70年代为少雨期。

Based on the temperature and precipitation data from Jiaxiang station from 1964 to 2005, the situation of climate changes in Jiax- iang county in the last 42 years had been comprehensively analyzed at the perspective of average temperature, average highest temperature, av- erage lowest temperature, rainfall changes tendency yearly and quarterly and abnormal year. The results showed that the average temperature, the average highest temperature, the lowest temperature all showed an increasing tendency respectively, the temperature increased especially obvious in 1990＇ s; The changes trend of each season were different, the winter warming trend was most obviously, and the increase of lowest temperature was most obviously ; The trend of precipitation had an apparent decreasing trend in the last 42 years, the least precipitation was in 1980＇s. The autumn rainfall had showed decrease trend, and winter was pluvial period in 1970＇ s, summer was pluvial period in 1980＇ s, spring was infrequent rain period in 1970＇ s.