摘要
利用吉木萨尔县1961—2005年历年日平均气温、最高(低)气温、降水量、日照时数、风速等资料,分析该县45年年际、年代际、四季及近10年的气候变化特征。得出:(1)吉木萨尔县45年全年及四季气温变化均呈上升趋势,尤其冬季增温最明显,为0.62℃/10年;且近10年是45年中最暖的时期。(2)45年来平均月最高气温变化不大;而月平均最低气温增温明显,尤其近10年平均月最低气温达45年中的最高。(3)45年全年降水量变化呈增湿趋势,变化倾向率为8.19mm/10年,其中:冬季和夏季降水量呈逐渐增多趋势;而春季和秋季平均降水量则呈缓慢减少的趋势。不同年代际全年和夏季降水量均以1990年代最多,1970年代最少。近10年的年降水量也呈增湿趋势,其中冬季降水量为45年中最多时期;秋季降水量为45年中最少时期。(4)45年中任何时段的日照时数和平均风速变化均呈减少(小)趋势。对当地生态环境的改善和农业经济发展等都有十分重要的意义。
By using the data of daily mean temperature, daily maximum and minimum temperature, precipitation, sunshine duration from 1961 to 2005, the inter-annual, interdecadal the seasonal climate changes are analyzed. The results are as follows： Firstly, the annual and the seasonal temperature are rising in recent 45 years, especially, the trend of temperature increase is the most remarkable in winter, and the recent 10 years is the wannest period. Secondly, the change of monthly mean maximum temperature is not significant, whereas monthly mean minimum temperature is rising in the last 10 years. Thirdly, annual precipitation is increasing and its variability is 8.19mm/10a, and so does the precipitation in winter and summer, but precipitation in spring and autumn are slowly decreasing. Meantime, annual precipitation in recent 10 years is also increasing, the precipitation in winter is the largest but in autumn is the smallest. Finally, sunshine duration and mean wind speed in each period are all decreasing.
出处
《气象》
CSCD
北大核心
2007年第6期96-101,共6页
Meteorological Monthly
基金
中国气象局气候专项(编号:CCSF2007-29)
关键词
气候变化
气温
降水
climate change air temperature rainfall
