摘要
利用塔中及沙漠周边气象站1997—2007年11a的地面观测资料,分析了该地区沙尘天气的气候变化特征。结果表明:该地区沙尘天气以浮尘天气为主,扬沙次之,沙尘暴最少,年平均日数分别为97.4d、59.6d、15.8d;具有明显的季节变化和年际变化,每年3月至8月是沙尘天气的多发时段,占了历年平均数79.6%,浮尘和扬沙年日数呈上升趋势,沙尘暴反之。沙尘天气总体分布特征遵循从东往西南到南面逐渐增多,塔中并不是沙尘天气出现最多的地区。温度在19～33℃、相对湿度在10%～16%、风速≥7m/s范围里且在偏东风和偏北风情况下,沙尘暴天气发生几率最高。
Based on the observation data of Tazhong station and the SUXTounding station of Taklimakan desert from 1997 to 2007, the climatic characteristics of dust weather were studied. The results show that, in all the dust weather events in Tazhong region, floating dust is the most frequent, blowing-sand weather is less and sandstorm is the least, the mean annual days were 97.4d, 59.6d and 15.8d respectively. Dust weather displays obvious seasonal and interannual changes. Dust weather occurred frequently during March to August, accounting for 79.6% of the annual average in past years. The floating dust and blowing-sand weather days showed an increasing trend, Contrary to the sandstorm situations. The collectivity distribution of the dust weather in this region increased from the east to southwest and the south. However, the dust weather in Tazhong is not the most frequent. The sandstorm weather is the most frequent under such conditions： the temperature is 19℃-33℃, relative humidity is 10%-16%, the wind is easterly and northerly and the wind speed is ≥7m/s.
出处
《沙漠与绿洲气象》
2009年第1期31-34,共4页
Desert and Oasis Meteorology
基金
国家自然科学基金项目(40775019)
新疆维吾尔自治区科技攻关项目(200833119)
中央级公益性科研院所基本科研业务费专项资金项目(IDM2006002
DIM200702I
DM200806)
新疆气象局气象科技研究项目(2007004)共同资助
关键词
沙尘天气
变化特征
温度
湿度
风
dust weather
variation characteristic
temperature
humidity
wind
