收稿日期: 2012-09-14
修回日期: 2013-02-03
网络出版日期: 2013-05-10
基金资助
国家自然科学基金项目“风险规避视角下跨流域调水工程可调水量概率预报的基础研究”（编号：51109224）；国家重点基础研究发展计划项目“气候变化对旱涝灾害的影响及风险评估”（编号：2010CB951102）资助.
Hanjiang River Basin Precipitation Multiple Time Scales Characteristics and with Circulation Factors Correlation Analysis
Received date: 2012-09-14
Revised date: 2013-02-03
Online published: 2013-05-10
郑晓东 , 鲁帆 , 马静 . 汉江流域降水多时间尺度特性及其与环流因子的相关性分析[J]. 地球科学进展, 2013 , 28(5) : 618 -626 . DOI: 10.11867/j.issn.1001-8166.2013.05.0618
First, this paper uses Morlet wavelet to the multiple time scales analysis of the Hanjiang River Basin precipitation and then to the correlation analysis of the Hanjiang River Basin precipitation and 74 circulation factors. The results show that: the precipitation has the main cycle with 4year, 7year and 18year in the Hanjiang River Basin for nearly 50 years, in which the 18year time scale is most prominent and the precipitation decreases; the Hanjiang River Basin precipitation respectively has a closely positive correlation with 14 circulation factors such as the western Pacific subtropical high area index, the cold air, the northern boundary of the eastern Pacific subtropical high and the northern polar vortex center position. The Hanjiang River Basin precipitation respectively has a closely negative correlation with East Asia slot position, the Pacific polar vortex index and Asia polar vortex intensity index. This study provides scientific basis for improving the level of the Hanjiang River Basin precipitation forecast and effective development of downstream flood control and drought relief work in the Hanjiang River Basin and the Yangtze River.
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