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1Temporal and spatial variation of atmospheric water vapor in the Taklimakan Desert and its surrounding areas显示文摘The study of the temporal and spatial variation of atmospheric water vapor has the important significance to show the response to climate change in the Taklimakan Desert. The series of monthly atmospheric water vapor from 1961 to 1998 are reconstructed using the observation data including the precipitation, ground water vapor pressure data over the period of 1961 to 2006 from 27 observation stations in its surrounding areas and meteorological data from the Tazhong station during 1999-2006. Then the relationship between atmospheric water vapor and ground vapor pressure is calculated and validated using the observation data for the period of 1976 to 2006 from 5 sounding stations (Hotan, Kuqa, Ruoqiang, Kashgar, and Minfeng). The temporal and spatial variation of atmospheric water vapor in the Taklimakan Desert and its surrounding areas is studied and then its distribution is generated. Results show that high value zone of atmospheric water vapor is mainly distributed in the northern Taklimakan Desert and the oasis-marginal belt of western desert and the value ranges from 14 to 15 mm. The low value center of atmospheric water vapor is in the hinterland of the desert and the value is only 7―8 mm. The annual variations of atmospheric water vapor show generally the increasing trend. How- ever, the variation of atmospheric water vapor in the surrounding areas and the hinterland of the desert is insignificant during 1961―1986. The atmospheric water vapor changes abruptly after 1986 and increases clearly in the two regions. The variation trend accords with that of the precipitation’s increasing significantly in southern Xinjiang for the recent 50 years. There is great error between the NCEP/NCAR reanalysis data of atmospheric water vapor and real data in theTaklimakan Desert.Qin Yang WenShou Wei Jun Li 2008Chinese Science Bulletin2008,53,S2:6
2地基GNSS水汽探测技术浅析显示文摘地球大气中水汽的高活跃性对整个天气系统影响巨大,鉴于传统水汽探测手段无法准确掌握水汽空间分布与时变特性,地基GNSS(Global Navigation Satellite System,全球导航卫星系统)作为新型大气探测技术,具有低成本、全天候、高精度、高时间分辨率、均一性好的优势,已经逐步成为传统水汽探测手段的有力补充。本文针对GNSS水汽层析的关键技术分析其原理以及先验精密站坐标的计算。张嘉男 王宝忠 2021青海科技2021,28,2:0
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