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| 华东地区不同等级降水日数的时空分布特征 | |
| 引用本文： | 吴昊旻,黄安宁,姜燕敏.华东地区不同等级降水日数的时空分布特征[J].气候与环境研究,2013,18(3):387-396. |
| 作者姓名： | 吴昊旻 黄安宁 姜燕敏 |
| 作者单位： | 1. 南京大学大气科学学院，南京210093; 丽水市气象局，丽水323000 2. 南京大学大气科学学院,南京,210093 3. 丽水市气象局,丽水,323000 |
| 基金项目： | 国家自然科学基金项目41175086;浙江省丽水市科技计划项目2010JYZB10;江苏高校优势学科建设工程资助项目 |
| 摘 要： | 根据华东地区1961～2010年逐日降水量台站观测资料，利用趋势分析、Mann-Kendall检验和经验正交函数（EOF）分析等方法揭示不同强度降水日数的时空演变特征。结果表明，华东地区的小雨日数为总雨日数的72.42%，占总雨日数的最大比重。同时发现小雨日数和总雨日数（暴雨和大暴雨日数）表现为显著的减少（增加）趋势，说明总雨日数的减少主要是由于小雨日数的减少所致。EOF 分析结果显示总雨日和小雨日的主要 EOF 模态在空间上表现出全场一致的减少趋势以及南北反相位的特征。福建中部既是总雨日数和小雨日数最大的区域，也是两者减少趋势最明显的地区。暴雨日数和大暴雨日数高值中心出现的区域基本重合，大致在浙江-江西-安徽三省交界处。 |
| 关 键 词： | 气候学 降水 Mann-Kendall检验 经验正交函数(EOF)分析 降水等级 华东 |
| 收稿时间： | 2011/12/6 0:00:00 |
| 修稿时间： | 2012/10/25 0:00:00 |
Temporal and Spatial Distribution of Different Grades of Precipitation Days in East China |
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| WU Haomin,HUANG Anning and JIANG Yanmin.Temporal and Spatial Distribution of Different Grades of Precipitation Days in East China[J].Climatic and Environmental Research,2013,18(3):387-396. | |
| Authors: | WU Haomin HUANG Anning and JIANG Yanmin |
| Institution: | School of Atmospheric Science, Nanjing University, Nanjing 210093;Lishui Meteorological Office, Lishui 323000;School of Atmospheric Science, Nanjing University, Nanjing 210093;Lishui Meteorological Office, Lishui 323000 |
| Abstract: | The spatial and temporal distributions of rainy days with different precipitation intensities over East China were revealed using trend analysis, Mann-Kendall test, and EOF (Empirical Orthogonal Function) analysis methods on observed daily precipitation data for East China between 1961 and 2010. The results show that light precipitation rainy days made up 72.42% of the total number of rainy days, which was more than the other three precipitation grades. It was also evident that the number of light precipitation rainy days decreased and the total number of torrential and heavy precipitation days increased significantly over the study period. The EOF analysis results indicated that the two dominant EOF modes, number of light precipitation rainy days and total number of rainy days, decreased over the whole of East China and had opposite phases in northern and southern East China. The areas with the highest total numbers of rainy days and light precipitation days were in the middle of Fujian Province, where both parameters decreased the most. However, the areas with the highest numbers of torrential rain and heavy rain days were Zhejiang, Jiangxi, and Anhui provinces. |
| Keywords: | Climatology Precipitation Mann-Kendall test EOF analysis Precipitation grades East China |
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