| 中国降雨过程时程分型特征 |
| |
| 引用本文： | 殷水清,王杨,谢云,刘安麟.中国降雨过程时程分型特征[J].水科学进展,2014,25(5):617-624. |
| |
| 作者姓名： | 殷水清 王杨 谢云 刘安麟 |
| |
| 作者单位： | 1.北京师范大学地表过程与资源生态国家重点实验室, 北京 100875; |
| |
| 基金项目： | 国家自然科学基金资助项目(41301281);国家重点基础研究发展计划(973计划)资助项目(2007CB407203)~~ |
| |
| 摘 要： | 为研究降雨过程雨强随历时的变化关系，利用中国14个气象站近40年逐分钟降雨资料，采用动态K均值聚类法并根据雨峰在降雨过程中出现的位置，将中国10256次降雨过程分为4种类型，即降雨前期集中型（Ⅰ型）、降雨中期集中型（Ⅱ型）、降雨后期集中型（Ⅲ型）和降雨均匀分布型（IV型）。结果表明:中国Ⅰ型降雨出现频次最高，占47.1%；Ⅱ型次之，占21.2%；Ⅲ型和IV型出现频次相当，分别占15.3%和16.4%。夏季Ⅰ型降雨发生频次占绝对优势，为夏季总降水过程的52.2%；冬季各类雨型发生频次相差不大。Ⅰ型多为短历时高强度降雨，而IV型多为长历时低强度降雨，Ⅱ型和Ⅲ型居中。历时越短时，Ⅰ型降雨的比重越大；随着降雨历时的增加，Ⅰ型降雨的比重明显下降，IV型降雨的比重增加。
|
| 关 键 词： | 降雨过程 雨型 分型特征 雨强 降雨历时 |
| 收稿时间： | 2014-04-28 |
Characteristics of intra-storm temporal pattern over China |
| |
| YIN Shuiqing,WANG Yang,XIE Yun,LIU Anlin.Characteristics of intra-storm temporal pattern over China[J].Advances in Water Science,2014,25(5):617-624. |
| |
| Authors: | YIN Shuiqing WANG Yang XIE Yun LIU Anlin |
| |
| Affiliation: | 1.State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China;2.School of Geography, Beijing Normal University, Beijing 100875, China;3.Encyclopedia of China Publishing House, Beijing 100037, China;4.Shaanxi Province Meteorological Bureau, Xian 710014, China |
| |
| Abstract: | To describe the characteristics of intra-storm temporal distributions of rainfall, minute resolution rainfall data were collected from 14 weather stations in China covering nearly 40 years. A total of 10 256 storms with precipitation amounts greater than 10 mm were analyzed. Based on a dynamic K-means cluster method and the time to peak index, the storms were divided into four hyetograph types: Rainfall concentrated early in the storm (Type I); rainfall concentrated in the middle of the storm (Type Ⅱ); rainfall concentrated at the end of the storm (Type Ⅲ); and rainfall distributed uniformly over time (Type IV). Type I storms occurred most frequently (47.1%), followed by Type Ⅱ (21.2%), Type Ⅲ (15.3%), and Type IV (16.4%). In summer, Type I storms had a normalized occurring frequency of 52.2%, suggesting that Type I storms were the most prevalent storm type during the summer. In winter, all four storm types occurred with similar frequencies. Type I storms were characterized by shorter durations and higher intensities, whereas Type IV storms had longer durations and lower intensities. The average duration, intensity, and the maximum 30 min intensity for Type I storms were 19.2 h, 2.8 mm/h, and 20.3 mm/h, respectively, whereas that for Type IV storms were 30.0 h, 1.4 mm/h, and 8.6 mm/h. |
| |
| Keywords: | intra-storm pattern hyetograph rainfall intensity duration of rainfall |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《水科学进展》浏览原始摘要信息 |
|
点击此处可从《水科学进展》下载全文 |
|
