| 基于SPEI指数分析华中地区近40a干旱时空分布特征 |
| |
| 引用本文： | 闫研,李忠贤.基于SPEI指数分析华中地区近40a干旱时空分布特征[J].气象科学,2015,35(5):646-652. |
| |
| 作者姓名： | 闫研 李忠贤 |
| |
| 作者单位： | 南京信息工程大学气象灾害预报预警与评估协同创新中心, 南京 210044;商丘市气象局, 河南 商丘 476000,南京信息工程大学气象灾害预报预警与评估协同创新中心, 南京 210044 |
| |
| 基金项目： | 江苏省高校自然科学研究面上项目(13KJB170013);江苏省高校"青蓝工程" |
| |
| 摘 要： | 分析了1961-2009年华中地区降水量、气温及蒸发量变化特征,在此基础上,采用标准化降水蒸散指数(SPEI)确定华中地区的干旱强度,按照SPEI指数的标准界值将干旱强度划分为4个等级并分析了各干旱等级的发生频率和空间分布。不同时间尺度SPEI指数的EOF分析表明:华中地区干旱的主要空间分布具有较好的全区一致性,且春季干旱的强度在四季中是最强的。
|
| 关 键 词： | 干旱 SPEI指数 干旱强度 EOF 华中地区 |
| 收稿时间： | 2014/1/15 0:00:00 |
| 修稿时间： | 5/6/2014 12:00:00 AM |
Temporal and spatial characteristics of drought for recent 40 years in central China based on SPEI index |
| |
| YAN Yan and LI Zhongxian.Temporal and spatial characteristics of drought for recent 40 years in central China based on SPEI index[J].Scientia Meteorologica Sinica,2015,35(5):646-652. |
| |
| Authors: | YAN Yan and LI Zhongxian |
| |
| Institution: | Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044, China;Shangqiu Meteorological Bureau, Henan Shangqiu 476000, China and Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044, China |
| |
| Abstract: | Based on the analysis of the variation characteristics of precipitation amount, temperature and evaporation in central China during 1961-2009, the drought intensity was divided into four grades according to the standardized precipitation evapotranspiration index(SPEI). Furthermore, the coverage area and occurrence frequency at different grades were also analyzed. The experience orthogonal function(EOF) analysis on SPEI at different time scales shows that the main spatial distribution of drought in central China has synchronism in the whole region, and the most serious drought occurrs in spring. |
| |
| Keywords: | Drought SPEI index Drought intensity EOF Central China |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《气象科学》浏览原始摘要信息 |
| 点击此处可从《气象科学》下载免费的PDF全文 |
|
