The changing pattern of droughts in the Lancang River Basin during 1960-2005
文献类型：SCI/SSCI论文
| 作者 | Tian J. |
| 发表日期 | 2013 |
| 关键词 | standardized precipitation index empirical mode decomposition nonstationary time-series variability transform rainfall china enso |
| 英文摘要 | Drought is one of the most costly natural disasters in the world. Understanding the drought characteristics in space and time will help deepen our apprehension of the drought formation and evolution mechanisms. It can also contribute to design monitoring system for drought warning and mitigation. In this study, we analyzed meteorological droughts, using the Standardized Precipitation Index, for Lancang River Basin, Southwest China. The 46-year (1960-2005) daily precipitation observations from 35 meteorological stations in the basin were used to derive the drought index. Spatial patterns and temporal patterns of the drought characteristics at multiple scales were investigated. The results utilizing the Principal Component Analysis and K-means clustering methods suggest that the study area can be divided into four sub-regions geographically with each sub-region having its own distinctive temporal evolution patterns of droughts. The temporal variability of droughts was investigated using the Empirical Mode Decomposition (EMD) analysis and the wavelet method. The EMD analysis showed that more than 60 % of the variance of the drought is associated with intra-decadal fluctuations in precipitation, except for one sub region, represented by the Changdu station. The wavelet transform showed an evolution of the main cycle near 3-7 years for most parts of the study area. |
| 出处 | Theoretical and Applied Climatology |
| 卷 | 111 |
| 期 | 3-4 |
| 页 | 401-415 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0177-798X |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/30461]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Tian J.. The changing pattern of droughts in the Lancang River Basin during 1960-2005. 2013. |
入库方式： OAI收割
来源：地理科学与资源研究所
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