| 长江流域汛期降水集中程度和洪涝关系研究 |
| |
| 引用本文： | 张录军,钱永甫.长江流域汛期降水集中程度和洪涝关系研究[J].地球物理学报,2004,47(4):622-630. |
| |
| 作者姓名： | 张录军 钱永甫 |
| |
| 作者单位： | 南京大学大气科学系，南京 210093 |
| |
| 基金项目： | 国家自然科学基金 ( 4 0 175 0 2 1,40 2 3 3 0 3 7)资助 |
| |
| 摘 要： | 用新定义的降水集中度和集中期分别讨论了我国长江流域不同地段汛期降水在时间和空间上的分布特征和变化规律. 结果表明在对长江流域旱涝灾害研究方面，降水集中度和集中期能够定量地表征降水量在时空场上的非均匀性，提取出最大降水重心对应的时段，因此可以比较理想地分析旱涝灾害发生的基本特征及其形成机制. 并且在长江中下游地区的降水集中度与东亚副热带季风之间存在着比较密切的联系.
|
| 关 键 词： | 降水集中度 降水集中期 时空分布 东亚季风指数 |
| 文章编号： | 0001-5733(2004)04-0622-09 |
| 收稿时间： | 2003-5-7 |
| 修稿时间： | 2006-8-20 |
A STUDY ON THE FEATURE OF PRECIPITATION CONCENTRATION AND ITS RELATION TO FLOOD-PRODUCING IN THE YANGTZE RIVER VALLEY OF CHINA |
| |
| ZHANG Lu-Jun,QIAN Yong-Fu.A STUDY ON THE FEATURE OF PRECIPITATION CONCENTRATION AND ITS RELATION TO FLOOD-PRODUCING IN THE YANGTZE RIVER VALLEY OF CHINA[J].Chinese Journal of Geophysics,2004,47(4):622-630. |
| |
| Authors: | ZHANG Lu-Jun QIAN Yong-Fu |
| |
| Institution: | Department of Atmospheric Sciences, Nanjing University, Nanjing 210093, China |
| |
| Abstract: | Based on the precipitation-concentration degree (PCD) and precipitation-concentration period (PCP), we analyze the characteristics of spatial and temporal distribution and variation of precipitation in the Yangtze River Valley. It is proved that these two parameters can display the temporal inhomogeneity in the precipitation field, and pick up the corresponding period of the largest precipitation amount in theoretical analyses of floods and droughts in the Yangtze River Valley. Thus the basic characteristics and mechanism of flood and drought can be fairly analyzed. And it is also found that there is a good relationship between the precipitation-concentration degree and the East Asian monsoon index in the middle and lower reaches of the Yangtze River. |
| |
| Keywords: | Precipitation-concentration degree (PCD) Precipitation-concentration period (PCP) Spatial and temporal distribution East Asian monsoon index |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《地球物理学报》浏览原始摘要信息 |
| 点击此处可从《地球物理学报》下载免费的PDF全文 |
