| WATER VAPOR CONTENT AND MEAN TRANSFER IN THE ATMOSPHERE OVER NORTHWEST CHINA |
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| 作者姓名： | YU Yaxun WU Guoxiong WANG Baoling DONG Anxiang BAI Huzhi |
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| 作者单位： | Lanzhou Arid Meteorological Institute Lanzhou 730020，Institute of Atmospheric Physics，Chinese Academy of Sciences，Beijing 100080，Lanzhou Arid Meteorological Institute，Lanzhuo 730020，Lanzhou Center Meteorological Observatory，Lanzhou 730020，Lanzhou Center Meteorological Observatory，Lanzhou 730020 |
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| 摘 要： | The interannual and intermonthly climatic features of the water vapor content(hereafterWVC)and its mean transfer in the atmosphere over Northwest China(hereafter NWC)arecalculated and analyzed by using the NCEP/NCAR global reanalysis grid data(2.5°×2.5°Lat/Lon)for 40 years(1958—1997).The results show that the WVC in the total air column over NWC infour seasons of the year is mainly concentrated on eastern and western NWC respectively.On theaverage,the WVC over eastern NWC decreases obviously during recent forty years except forwinter.while it decreases over western NWC in the whole year.But the WVC over NWC has beenincreasing since late 1980s in summer.The water vapor comes from the southwestern warm andwet air current along the Yarlung Zangbo River Valley and the Bay of Bengal.and from mid-western Tibetan Plateau and also from the Qinling Mountains at southern Shaanxi Province.Theyearly water vapor divergence appears over the middle of NWC to northern Xinjiang andsoutheastern Shaanxi Province.The yearly water vapor convergence appears over the Tarim Basinand the Tibetan Plateau as well as western Sichuan and southern Gansu.
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| 收稿时间： | 1999/9/29 0:00:00 |
| 修稿时间： | 2001/1/11 0:00:00 |
WATER VAPOR CONTENT AND MEAN TRANSFER IN THE ATMOSPHERE OVER NORTHWEST CHINA |
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| YU Yaxun,WU Guoxiong,WANG Baoling,DONG Anxiang,BAI Huzhi.WATER VAPOR CONTENT AND MEAN TRANSFER IN THE ATMOSPHERE OVER NORTHWEST CHINA[J].Acta Meteorologica Sinica,2001,15(2):191-204. |
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| Authors: | YU Yaxun WU Guoxiong WANG Baoling DONG Anxiang and BAI Huzhi |
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| Institution: | YU Yaxun Lanzhou Arid Meteorological Institute,Lanzhou 730020WU Guoxiong Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100080WANG Baoling Lanzhou Arid Meteorological Institute,Lanzhuo 730020DONG Anxiang BAI Huzhi Lanzhou Center Meteorological Observatory,Lanzhou 730020 |
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| Abstract: | The interannual and intermonthly climatic features of the water vapor content(hereafter WVC) and its mean transfer in the atmosphere over Northwest China(hereafter NWC) are calculated and analyzed by using the NCEP/NCAR global reanalysis grid data(2.5°×2.5°Lat/Lon) for 40 years(1958-1997).The results show that the WVC in the total air column over NWC in four seasons of the year is mainly concentrated on eastern and western NWC respectively.On the average,the WVC over eastern NWC decreases obviously during recent forty years except for winter.while it decreases over western NWC in the whole year.But the WVC over NWC has been increasing since late 1980s in summer.The water vapor comes from the southwestern warm and wet air current along the Yarlung Zangbo River Valley and the Bay of Bengal.and from mid-western Tibetan Plateau and also from the Qinling Mountains at southern Shaanxi Province.The yearly water vapor divergence appears over the middle of NWC to northern Xinjiang and southeastern Shaanxi Province.The yearly water vapor convergence appears over the Tarim Basin and the Tibetan Plateau as well as western Sichuan and southern Gansu. |
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| Keywords: | Northwest China(NWC) water vapor content(WVC) mean water vapor transfer climatic variation |
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