Journal of Arid Meteorology
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LIN Dan,WANG Weijia
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林 丹,王维佳
作者简介:
基金资助:
西南区域气象中心 2011 年区域重大科研业务项目“西南地区空中云水资源评估和开发利用研究”(西南区域气 2011 -02)资助
Abstract:
Based on NCEP monthly cloud water and precipitable water data from 1980 to 2009,the spatial and temporal distribution characteristic and variation trend of ratio of cloud water to precipitable water in southwest China were analyzed in this paper. The results show that the annual and seasonal ratio of cloud water to precipitable water in southwest China had obvious regional difference,which decreased from northwest to southeast,and the high value was located in Western Sichuan Plateau. Ratio of cloud water to precipitable water decreased from February to August,and increased from September to January in a year,and the ratio was minimum in summer and maximum in winter. There was a clear downward trend for annual ratio of cloud water to precipitable water in 30 years,and the ra- tio also decreased in summer and autumn.
Key words: southwest China, precipitable water, cloud water, spatial and temporal characteristic
摘要:
采用 1980 ~2009 年云水量和可降水量的 NCEP 逐月再分析资料,通过统计分析,研究 30 a 来西南地区(云南、贵州、重庆、四川)云水量与可降水量比值的时空分布特征和变化趋势。结果表明:(1)西南地区年、季节云水量与可降水比值均具有明显的地区性差异,由西北向东南递减,高值区位于川西高原;(2)云水量与可降水比值年内分布不均匀,从 2 月到 8 月逐渐减小,9 月至 1 月逐渐增大,同时,季节差异较大,夏季最小,冬季最大;(3)30 a 来,整个西南地区年、夏季和秋季云水量与可降水量比值呈显著减少趋势。
关键词: 西南地区, 可降水量, 云水量, 演变特征
CLC Number:
P426. 61+4  
LIN Dan,WANG Weijia. Trend and Distribution Features of Ratio of Cloud Water to Precipitable Water in Southwest China [J]. Journal of Arid Meteorology, DOI: 10. 11755/j. issn. 1006 -7639(2013) -03 -0482.
林 丹,王维佳. 西南地区云水量与可降水量比值的分布特征和变化趋势[J]. 干旱气象, DOI: 10. 11755/j. issn. 1006 -7639(2013) -03 -0482.
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URL: http://www.ghqx.org.cn/EN/10. 11755/j. issn. 1006 -7639(2013) -03 -0482
http://www.ghqx.org.cn/EN/Y2013/V31/I3/482
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