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| 西南地区可降水量分布及其与纵向岭谷区降水的关系 | |
| 引用本文： | 任菊章,肖子牛,张万诚,郑建萌,段长春.西南地区可降水量分布及其与纵向岭谷区降水的关系[J].气象科学,2013,33(4):442-448. |
| 作者姓名： | 任菊章 肖子牛 张万诚 郑建萌 段长春 |
| 作者单位： | 1. 云南省气象局季风与气象灾害研究开放实验室,昆明 650034;云南省气象科学研究所,昆明 650034 2. 中国气象局干部培训中心,北京,100081 3. 云南省气侯中心,昆明,650034 |
| 基金项目： | 国家自然科学基金地区基金项目，国家自然科学云南省联合基金项目，云南省省院校科技合作计划，公益性行业(气象)专项科研 |
| 摘 要： | 利用1948-2002年NCEP/NCAR资料对西南纵向岭谷及其周边区域可降水量做EOF分解,结果表明:无论在于季还是雨季,可降水量的前两个主分量在25°N以北的纵向岭谷地区呈纬向分布特征,其时间序列均有显著的年代际变化.而纵向岭谷地区的实际降水年代际的变化并不显著,其年际变化更为清晰.降水及可降水量多雨年和少雨年的合成分析结果表明:在于季,多雨年和少雨年的可降水量与降水量均存在显著差异,并且在可降水量差值变化梯度越大的区域,降水差异越明显.在雨季,多雨年和少雨年的可降水量差别不大,但降水存在显著的差异.可见,在于季可降水量与实际降水的关系更为直接,较雨季也更为密切. |
| 关 键 词： | 可降水量 纵向岭谷 年代际变化 |
| 收稿时间： | 2012/1/30 0:00:00 |
| 修稿时间： | 2012/8/14 0:00:00 |
Relationship between the air column precipitable water in the southwest area and the rainfall over the longitudinal range-gorge |
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| REN Juzhang,XIAO Ziniu,ZHANG Wancheng,ZHENG Jianmeng and DUAN Changchun.Relationship between the air column precipitable water in the southwest area and the rainfall over the longitudinal range-gorge[J].Scientia Meteorologica Sinica,2013,33(4):442-448. | |
| Authors: | REN Juzhang XIAO Ziniu ZHANG Wancheng ZHENG Jianmeng and DUAN Changchun |
| Institution: | Laboratory for Monsoon and Weather Disaster Research of Yunnan Province, Kunming 650034, China;Yunnan Institnte of Meteorological Science, Kunming 650034, China;WMO Regional Training Centre, Beijing 100081, China;Laboratory for Monsoon and Weather Disaster Research of Yunnan Province, Kunming 650034, China;Yunnan Institnte of Meteorological Science, Kunming 650034, China;Yunnan Climate Centre, Kunming 650034, China;Laboratory for Monsoon and Weather Disaster Research of Yunnan Province, Kunming 650034, China;Yunnan Institnte of Meteorological Science, Kunming 650034, China |
| Abstract: | Using NCEP/NCAR data, the dominant spatial and temporal patterns of air column precipitable water(PW) over the southwest area are studied by empirical orthogonal function (EOF) analysis for the rainy/dry seasons of 1948-2002. The results show that latitude distribution exists in EOF1 and EOF2 in the north of 25 °N, and a sudden shift occurrs in EOF1 and EOF2 in rainy and dry seasons. On the other hand, there exists little difference of PW over the longitudinal range-gorge but quite obrious difference of rainfall between wet and dry years in rainy seasons, which is possibly related to the special terrain of the longitudinal range-gorge. In the dry seasons, there exists considerable difference of PW and rainfall over the longitudinal range-gorge between wet and dry years, which shows the correlation between PW and rainfall in dry seasons is closer. |
| Keywords: | Air column precipitable water Longitudinal range-gorge Inter-decadal change |
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