| CHARACTERIZATION AND CAUSAL ANALYSIS OF TEMPORAL AND SPATIAL VARIATION IN DRY-WET CONDITIONS IN AUTUMN IN SOUTHWEST CHINA |
| |
| 作者姓名： | 李栋梁 徐栋夫 王 慧 曲巧娜 赵晓萌 |
| |
| 作者单位： | Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Key Laboratory of Meteorological Disaster of Ministry of Education/School of Atmospheric Science, NUIST, Nanjing 210044 China |
| |
| 基金项目： | National Key Basic Research Development Plan(973)project(3013 CB430202);National Natural Science Foundation(41305080);a project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD) |
| |
| 摘 要： | Based on the daily precipitation and temperature data of 97 stations in Southwest China(SW China) from1960 to 2009, a dry-wet index is calculated. The spatiotemporal variation characteristics of dry-wet conditions,precipitation and temperature are studied. Then the abnormal atmospheric circulation characteristics are discussed using reanalysis data. The results show that SW China has exhibited an overall trend of autumnal drought since the late1980 s, and this drought trend became more significant early in the 2000 s, especially in the eastern SW China. Autumnal dry-wet variation in southwestern China showed two major modes: consistent change across the entire region and opposing changes in the eastern and western regions. The spatial distribution of dry-wet anomalies was more significantly affected by precipitation, while temporal variation in dry-wet conditions was more strongly influenced by temperature. The former mode is affected by the anomalies of the precedent SST near the Western Pacific Warm Pool,the Western Pacific Subtropical High, the East Asian Trough and the South Trough. The latter mode is related to the wind anomalies in the eastern SW China and the vertical movement in the western and eastern SW China. These are the main influencing factors for the autumn dry-wet variation in SW China, which are of great significance to the prediction of drought.
|
| 关 键 词： | dry-wet characteristics EOF analysis Southwest China circulation characteristics SST |
| 修稿时间： | 2014/11/27 0:00:00 |
CHARACTERIZATION AND CAUSAL ANALYSIS OF TEMPORAL AND SPATIAL VARIATION IN DRY-WET CONDITIONS IN AUTUMN IN SOUTHWEST CHINA |
| |
| LI Dong-liang,XU Dong-fu,WANG Hui,QU Qiao-na and ZHAO Xiao-meng.CHARACTERIZATION AND CAUSAL ANALYSIS OF TEMPORAL AND SPATIAL VARIATION IN DRY-WET CONDITIONS IN AUTUMN IN SOUTHWEST CHINA[J].Journal of Tropical Meteorology,2015,21(1):55-66. |
| |
| Authors: | LI Dong-liang XU Dong-fu WANG Hui QU Qiao-na and ZHAO Xiao-meng |
| |
| Institution: | Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Key Laboratory of Meteorological Disaster of Ministry of Education/School of Atmospheric Science, NUIST, Nanjing 210044 China |
| |
| Abstract: | Based on the daily precipitation and temperature data of 97 stations in Southwest China (SW China) from 1960 to 2009, a dry-wet index is calculated. The spatiotemporal variation characteristics of dry-wet conditions, precipitation and temperature are studied. Then the abnormal atmospheric circulation characteristics are discussed using reanalysis data. The results show that SW China has exhibited an overall trend of autumnal drought since the late 1980s, and this drought trend became more significant early in the 2000s, especially in the eastern SW China. Autumnal dry-wet variation in southwestern China showed two major modes: consistent change across the entire region and opposing changes in the eastern and western regions. The spatial distribution of dry-wet anomalies was more significantly affected by precipitation, while temporal variation in dry-wet conditions was more strongly influenced by temperature. The former mode is affected by the anomalies of the precedent SST near the Western Pacific Warm Pool, the Western Pacific Subtropical High, the East Asian Trough and the South Trough. The latter mode is related to the wind anomalies in the eastern SW China and the vertical movement in the western and eastern SW China. These are the main influencing factors for the autumn dry-wet variation in SW China, which are of great significance to the prediction of drought. |
| |
| Keywords: | dry-wet characteristics EOF analysis Southwest China circulation characteristics SST |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《热带气象学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《热带气象学报(英文版)》下载免费的PDF全文 |
