DIFFERENCES IN CIRCULATION AND MOISTURE BETWEEN DRY AND WET YEARS IN NORTHWEST CHINA

Wang Xiurong; Xu Xiangde; Yao Wenqing

Vol.13, NO.5, 2002

Article Contents

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Wang Xiurong, Xu Xiangde, Yao Wenqing. Differences in circulation and moisture between dry and wet years in Northwest China. J Appl Meteor Sci, 2002, 13(5): 550-559.

Citation:

Wang Xiurong, Xu Xiangde, Yao Wenqing. Differences in circulation and moisture between dry and wet years in Northwest China. J Appl Meteor Sci, 2002, 13(5): 550-559.

Wang Xiurong, Xu Xiangde, Yao Wenqing. Differences in circulation and moisture between dry and wet years in Northwest China. J Appl Meteor Sci, 2002, 13(5): 550-559.

Citation:

Wang Xiurong, Xu Xiangde, Yao Wenqing. Differences in circulation and moisture between dry and wet years in Northwest China. J Appl Meteor Sci, 2002, 13(5): 550-559.

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DIFFERENCES IN CIRCULATION AND MOISTURE BETWEEN DRY AND WET YEARS IN NORTHWEST CHINA

Chinese Academy of Meteorological Sciences, Beijing 100081

Received Date: 2001-06-08
Rev Recd Date: 2001-10-22
Publish Date: 2002-10-31

Abstract

Abstract

In the context of summer rainfall observations of 19 stations in Northwest China and NCEP/NCAR global monthly mean reanalyzed grid data in spring from 1958 to 1997, correlative statistical analysis are performed on the related parameters in spring in the years of being dry or wet in summer in Northwest China and its nearby regions. Results show that in spring the circulation and moisture features of dry years in the related areas are significantly different from those of wet years.
- Northwest China;
- Dry/wet summer;
- Antecedent circulation and moisture features;

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References(8)

Figures and Tables

图 1 西北地区夏季降水随时间的演变

(a)72个加密测站 (1961~1990年); (b)19个测站 (1951~1999年)

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图 2 (a) 全国春季降水分布 (b) 全国夏季降水分布 (单位:mm)

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图 3 (a) 西北夏季降水与前期春季500hPa位势高度的相关（图中阴影从浅至深分别为信度超过90%、95%、99%的区域，下同）：(b)、(c) 分别为湿润夏季年、干旱夏季年春季位势高度距平 (单位：hPa)

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图 4 (a)、(b) 分别为西北夏季降水和前期春季500 hPa U、V风场的相关, (c)、(d) 分别为湿润、干旱夏季年的前期春季500 hPa风矢场的距平场 (单位:m/ s, 相关图中阴影说明同图 3)

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图 5 (a) 西北夏季降水和前期春季500hPa水汽的相关，(b)、(c) 分别为500hPa湿润夏季年、干旱夏季年比湿距平（单位：g/kg）

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图 6 500hPa水汽通量场 (a) 西北夏季降水和纬向水汽通量qu及经向水汽通量qv的相关矢量图, (b)､(c) 分别为湿润､干旱夏季年春季距平 (单位:g/(s·hPa·cm))

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References

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