| 天气与气候 |
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| Character of Spring Precipitation and Water Vapor Flux in Spring-rainy Year and Drought Year in Ningxia |
| NA Li1,2, DING Yong-hong2, ZHENG Guang-fen2, LIANG Xu2 |
| 1.Key Laboratory of Meteorology Disaster Preventing and Reducing of Ningxia, Yinchuan 750002, China; 2.Ningxia Meteorological Observatory, Yinchuan 750002, China |
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Abstract According to the precipitation data from 1961 to 2006 of the 19 main stations in Ningxia, the character of the precipitation in spring was analyzed. There were the 16-year long period and the 8-year short period, but the inter-year and the inter-decade changes were not obvious. There was a closely negative correlation between the date of first soaking rainfall and the precipitation in spring, and the possible first soaking rainfall would make great contribution to the precipitation in whole spring. Research on the water vapor transportation between 850 hPa and 700 hPa in spring-rainy year and drought year shows that there are two vapor inflow corridors to Ningxia. The one comes from the Bengal gulf and the other comes from the Caspian Sea. In the typical spring-rainy year, these two water vapor belts converge in obviously north-oriented region, with large convergence area and big central value. In the typical spring-drought year, these two water vapor belts converge in west-oriented region, with small convergence area and less central value than the normal. The water vapor flux at u direction is not different between the rainy year and the drought year, but adversely different at v direction. The Ningxia area is controlled by positive anomaly in rainy year and controlled by negative anomaly in drought year.
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Received: 29 March 2007
Published: 20 May 2008
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[1]林年丰,汤洁.中国干旱半干旱区的环境演变与荒漠化的成因[J].地理科学,2001,21(1):24-29.
[2]郭江勇,李耀辉,王文,等.甘肃黄土高原春旱的气候特征及预测方法[J].中国沙漠,2004,24(2):211-217.
[3]李艳春,梁旭,纳丽,等.宁夏春季首场透雨的气候预测探索[J].干旱气象,2005,23（4）:46-51.
[4]张强,胡隐樵,曹晓彦,等.论西北干旱气候的若干问题[J].中国沙漠,2000,20(4):357-362.
[5]马晓波,胡泽勇.青藏高原40年来降水变化趋势及突变的分析[J].中国沙漠,2005,25(1):137-139.
[6]王新平,张景光,李新荣,等.沙坡头地区多年降水分布特征、趋势及其变率[J].中国沙漠,2001,21(4):260-264.
[7]张杰,郭铌,荻潇泓.西北地区东部冬季降水与次年沙尘暴发生的关系[J].中国沙漠,2004,24(6):603-606.
[8]潘晓玲,马映军,师庆东,等.中国西部干旱区生态环境演变过程[J].中国沙漠,2004,24(6):663-673.
[9]赵庆云,赵红岩,刘新伟.西北东部极端降水事件及异常旱涝季节变化倾向[J].中国沙漠,2006,26(5):745-749.
[10]郭江勇,叶燕华,林纾,等.甘肃河东春季透雨日期与海温的相关分析[J].干旱地区农业研究,2004,22(1):18-22.
[11]李耀辉,李栋梁,赵庆云.中国西北春季降水与太平洋秋季海温的异常特征及其相关分析[J].高原气象,2000,19(1):100-110.
[12]蔡晓军,李栋梁,姚辉.中国西北地区春末夏初降水异常的时空变化特征[J].高原气象,1998,17(2):170-181.
[13]信忠保,谢志仁,王文.宁夏降水变化及其与ENSO事件的关系[J].地理科学,2005,25 (1):49-55
[14]陈晓光,金秀玲.ENSO与宁夏夏季降水关系的分析[J].甘肃气象,1998,16(1):48-52. |
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2008, Vol. 28 
