1961—2010年云南省气候变化特征分析

为了研究云南气候变化特点，利用1961—2010 年云南25 个站点的平均气温、最低气温和最高气温、降水量资料，分析研究云南近50 年来的气候变化。结果表明：（1）云南升温趋势明显，升温率达0.24℃/10 a；（2）一年四季中，冬季升温的趋势最明显，春季、夏季和秋季的升温幅度大致相等；（3）年降水量呈略减少趋势，长期变化趋势不显著。年降水量呈周期性的波动变化，且年际变化较大；（4）年平均降水日数变化总体呈下降趋势，其中下降最显著的是小雨日数，中雨日数略为下降，而大雨和暴雨日数却略为增加；（5）年降水强度总体呈上升趋势。

Climate Change Features in Yunnan from 1961 to 2010

The authors analyzed the climate change features in Yunnan in nearly 50 years based on the meteorological data of the average temperature, minimum temperature, maximum temperature and the precipitation from 25 stations in Yunnan during 1961-2010. The results showed that: (1) the warming trend was significant in Yunnan with the heating rate of 0.24℃/10 a; (2) the warming trend was most significant in winter, and the temperature had approximately equal increasing magnitude in spring, summer and autumn;(3) the annual precipitation showed a slight decrease trend, and the change of long- term trend was not significant; the annual precipitation showed a periodic fluctuation change with bigger inter-annual variation;(4) the annual average precipitation days showed a downward trend, thereinto, light rain days decreased most significantly, moderate rain days slightly decreased, heavy rain and storm days presented slightly increasing trend; (5) annual precipitation intensity showed an overall upward trend.