OALib Journal期刊
ISSN: 2333-9721
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塔里木盆地水汽含量的计算与特征分析
DOI: 10.11821/xb201007009, PP. 853-862
Keywords: 水汽,可降水量,塔里木盆地
Abstract:
利用1976-2009年塔里木盆地的和田、库车、若羌、喀什和民丰5个探空站的实测资料计算了逐月平均水汽含量,并建立了与地面水汽压的关系式;利用这种关系式计算了盆地及周边地区28个站水汽含量,进行了EOF分解,得出了水汽分布形式;分析了地表水汽压随高度的变化;对在盆地腹地及周边地区进行的GPS观测资料进行了水汽含量的反演,并与探空计算值进行了对比。结果表明盆地内水汽含量有两个高值区,主要分布在盆地西部和北部的边缘地带,中心水汽含量在13~14mm,均位于塔里木河干流、叶尔羌河流域、阿克苏河支流周围的绿洲地区。塔克拉玛干沙漠腹地是水汽的低值区中心,水汽含量仅为7~8mm,塔中是所有站中水汽量最少的,由中心向外逐渐增加,在环塔里木盆地的西部、北部绿洲区达到最高,然后由于海拔高度的影响又逐渐减小。塔里木盆地地基GPS反演水汽数据与探空计算值存在良好的线性关系。
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