石河子绿洲空气湿度和降水的长期变化趋势分析

分析了石河子绿洲3个地面站(炮台、石河子和莫索湾)41a(1964～2004年)的温度、相对湿度和降水,发现随着石河子垦区绿洲面积的扩大以及新疆增温增湿的气候变化趋势,石河子绿洲也有其比较独特的区域气候特征。主要表现在:(1)41a来温度、降水量呈增加趋势,但空气湿度比较稳定,没有明显的变化;(2)石河子绿洲的温度、降水量以及空气湿度具有明显的季节变化特征。秋季的温度变幅最大,冬季最小。这与新疆大部分地区冬季增温幅度最大有所不同。空气相对湿度变化的季节差异不明显。(3)以莫索湾站代表绿洲边缘,石河子站代表绿洲区,其降水、温度和空气湿度变化有明显差异,显示了比较明显的绿洲“冷岛”和“湿岛”效应。

Analysis on Secular Variation of Air Humidity and Precipitation in the Shihezi Oasis

Analyzed the data of temperature, precipitation and air humidity at the 3 ground stations (Paotai, Shihezi, and Mosowan) in the Shihezi Oasis from 1964 to 2004, the results are shown: (1) Temperature and precipitation have been increasing in the past 41 years, but the air humidity don't have obvious change. (2) The variation characteristics of temperature, precipitation and air humidity in the Shihezi Oasis have apparent seasonal. In autumn, the temperature change range is the most, and in winter is the least, this is different from the greater part of Xinjiang that the most change range is in winter. The seasonal variation of relative air humidity is not obvious. (3) Regarded Mosowan Station as the typical representation of oasis borders, and Shihezi Station as of oasis districts, the changes of their precipitation, temperature and air humidity are obviously different, and there are apparent "cold-island" and " humid-island" effect in oasis.