1997—2007年塔克拉玛干沙漠腹地沙尘天气变化特征--《沙漠与绿洲气象》2009年01期

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【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。

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【作者单位】:

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,gYSB LKS0塔中气象站;中国气象局乌鲁木齐沙漠气象研究所;阜康市气象局;巴州气象局雷达站;

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沙尘天气 变化特征 温度 湿度 风 沙尘暴日数 塔克拉玛干沙漠腹 塔中地区 扬沙 上升趋势水利论文/kp)j^m

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【基金】:国家自然科学基金项目(40775019)水利论文WA+| f]t]

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新疆维吾尔自治区科技攻关项目(200833119)

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新疆气象局气象科技研究项目(2007004)共同资助

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【分类号】:P445.4

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沙尘天气分为3个等级[1],即浮尘、扬沙、沙尘暴(包括沙尘暴、强沙尘暴和特强沙尘暴),而通常将沙尘暴和扬沙天气合在一起统称为沙尘天气,风沙天气是我国北方春夏季频发的灾害性天气。随着生态环境被破坏,荒漠化趋势的加重,对沙尘天气的监测工作也越来越被人们重视。塔克拉玛干

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