1961—2008年昆山市气候变化特征

利用1961—2008年昆山市气温、降水量和日照时数等气象要素资料,通过线性趋势方程、滑动平均等统计方法,探讨近48 a昆山气候变化特征。结果表明:昆山年平均气温和四季平均气温均呈升高趋势,其中春季增温最明显,冬季次之;年平均最低气温的增温速度高于最高气温。降水量总体呈略上升趋势,冬、夏两季降水量增加明显,春、秋季降水量则呈减小趋势,但不显著,降水年际变化幅度较大。年总日照时数和各季日照时数均呈下降趋势,其中尤以夏季减少最明显。

Characteristics of climate change from 1961 to 2008 in Kunshan,Jiangsu province

Based on air temperature, precipitation and sunshine duration data from 1961 to 2008 in Kunshan, the climate characteristics were analyzed by the linear trend method and sliding average method. The results indicate that annual and seasonal air temperatures are the increasing trends, especially in spring, then in winter. The increasing rates of the minimum annual air temperature are higher than those of the maximum air temperature. In general, precipitation is the increasing trend. Precipitation increases obviously in winter and summer, while it decreases weakly in spring and autumn. Inter-annual variation of precipitation is obvious. Annual and seasonal sunshine durations are the decreasing trends, especially in summer.