新疆库车县近40a来气温与蒸发量变化趋势分析

The Trend Analysis on Air Temperature and Evaporation in Kuche County During Recent 40 Years

通过对新疆库车县1971-2006年气温与蒸发量变化趋势的分析,发现年平均气温及四季(春季、夏季、秋季、冬季)平均气温36 a来无明显变化,均在多年平均值上下波动。年蒸发量和4个季节平均蒸发量均呈显著下降的趋势,其中年蒸发量的下降率为35 mm/a,4个季节的下降率以夏季最大,冬季最小。并在此基础上,对库车县蒸发量下降的原因进行了分析。

Based on the trend analysis on air temperature and evaporation in Kuche County,Xinjiang from 1971 to 2006, the following results were acquired. Annual mean air temperature and mean air temperature of four season （spring, summer, autumn and winter） showed no changes and fluctuated around multi-year＇s average value. Yearly evaporation dropped obviously at the rate of 35 mm per year. Evaporation of four season also decreased with that of summer decreased the most and the winter the least. The reasons of evaporation decrease were also analyzed.