Regionalization and Spatiotemporal Variation of Drought in China Based on Standardized Precipitation Evapotranspiration Index 1961–2013Reportar como inadecuado




Regionalization and Spatiotemporal Variation of Drought in China Based on Standardized Precipitation Evapotranspiration Index 1961–2013 - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Advances in Meteorology - Volume 2015 2015, Article ID 950262, 18 pages -

Research Article

Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100101, China

University of Chinese Academy of Sciences, Beijing 100049, China

Received 30 January 2015; Revised 12 May 2015; Accepted 18 May 2015

Academic Editor: S. Vicente-Serrano

Copyright © 2015 Xiongfei Liu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

China is considered to be one of the most drought prone countries. This study is dedicated to analyzing the regionalization and spatiotemporal variations of drought based on the Standardized Precipitation Evapotranspiration Index, which covers the period 1961–2013 across 810 stations in China. Using Spatial “K”luster Analysis by Tree Edge Removal method, China was divided into eight regions: southwest SW, northeast NE, north N, southeast SE, Yangtze River YR, northwest NW, central China C, and Tibet Plateau TP. The spatiotemporal variations of drought characteristics indicated that the drought count in NE and C was generally high. Southern China and NW had suffered long drought duration and extreme severity. The MK test results show that stations with significant drying trends mainly locate in SW, N, NW, and C. The severe drought frequency was very high in 1990s and 2000s. Furthermore, more attention should be paid to abnormal less precipitation in summer and abnormal high temperature in spring in SW, NE, N, and C. Besides, abnormal less precipitation is the main factor of drought in SE and YR in whole year. This study is anticipated to support the water resources management, and to promote the realization of environmental protection and agricultural production.





Autor: Xiongfei Liu, Shixin Wang, Yi Zhou, Futao Wang, Wenjun Li, and Wenliang Liu

Fuente: https://www.hindawi.com/



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