乌鲁木齐市近40年相对湿度气候特征分析(英文)

Analysis on the Climate Characteristics of Relative Humidity in Recent 40 Years in Urumqi City

利用乌鲁木齐市1961～2000年逐日平均相对湿度资料,分析了乌鲁木齐市近40年相对湿度的基本气候特征、变化趋势等。结果表明,乌鲁木齐市年平均相对湿度为57.5%。一年四季中冬季的相对湿度最大,为77.5%;夏季最小,为41.2%。春、夏、秋、冬季以及年相对湿度均呈增加趋势。逐年平均相对湿度存在以2、3～4和准7年为主的周期,其中准7年周期振荡最为强烈。

By using the daily average relative humidity data in Urumqi during 1961-2000,the basic climate characteristics and the variation trend of relative humidity in Urumqi in recent 40 years were analyzed.The results showed that the yearly average relative humidity in Urumqi was 57.5%.The relative humidity in winter was 77.5% which was the biggest all the year round,and the relative humidity in summer was 41.2% which was the smallest.The relative humidity in spring,summer,autumn,winter and the yearly relative humidity all displayed the increase trend.The yearly mean relative humidity had the periods of mainly 2,3-4 and quasi-7 years.The periodic oscillation of quasi-7 years was the strongest.