TY - JOUR
T1 - Quantitative and detailed spatiotemporal patterns of drought in China during 2001–2013
AU - Zhou, Lei
AU - Wu, Jianjun
AU - Mo, Xinyu
AU - Zhou, Hongkui
AU - Diao, Chunyuan
AU - Wang, Qianfeng
AU - Chen, Yuanhang
AU - Zhang, Fengying
N1 - Funding Information:
This research received financial support from the Project 41501556 supported by National Natural Science Foundation of China. We are also grateful to Level 1 and Atmosphere Archive and Distribution System and China Meteorological Data Sharing Service System for providing remotely sensed and meteorological data in our research.
Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2017/7/1
Y1 - 2017/7/1
N2 - Investigation of spatiotemporal patterns of drought is essential to understand the mechanism and influencing factors of drought occurrence and development. Due to the differences in designation of various drought indices, it remains a great challenge to obtain an accurate result in spatiotemporal patterns investigation of drought. In this study, a quantitative drought monitoring index (i.e., Integrated Surface Drought Index, ISDI) was used to identify spatiotemporal patterns of drought and the drought variation trend at the pixel level during 2001–2013 over China. Eco-geographical regionalization was used as an evaluation unit to distinguish the ecological and climatic background of drought over the whole country. The results showed that the spatial distribution of drought intensity has a strong correlation with eco-geographical regionalization in China. The severe drought areas were mainly concentrated in sub-humid regions and semi-arid regions of medium temperate zones, and humid regions of middle subtropical zones. The regions with higher drought probabilities were most distributed in the south and north of China, while the regions in central and western China exhibited lower drought probabilities. The most obvious decreasing trend of ISDI from 2001 to 2013 was located in the northeast of China and south of the Yangtze River. This decrease in ISDI over time indicates a trend for progressive aggravation of drought severity in these areas. This study shows great promise in informing the future drought prevention measures and management policies under the background of more frequent extreme climate events.
AB - Investigation of spatiotemporal patterns of drought is essential to understand the mechanism and influencing factors of drought occurrence and development. Due to the differences in designation of various drought indices, it remains a great challenge to obtain an accurate result in spatiotemporal patterns investigation of drought. In this study, a quantitative drought monitoring index (i.e., Integrated Surface Drought Index, ISDI) was used to identify spatiotemporal patterns of drought and the drought variation trend at the pixel level during 2001–2013 over China. Eco-geographical regionalization was used as an evaluation unit to distinguish the ecological and climatic background of drought over the whole country. The results showed that the spatial distribution of drought intensity has a strong correlation with eco-geographical regionalization in China. The severe drought areas were mainly concentrated in sub-humid regions and semi-arid regions of medium temperate zones, and humid regions of middle subtropical zones. The regions with higher drought probabilities were most distributed in the south and north of China, while the regions in central and western China exhibited lower drought probabilities. The most obvious decreasing trend of ISDI from 2001 to 2013 was located in the northeast of China and south of the Yangtze River. This decrease in ISDI over time indicates a trend for progressive aggravation of drought severity in these areas. This study shows great promise in informing the future drought prevention measures and management policies under the background of more frequent extreme climate events.
KW - China
KW - Drought
KW - ISDI
KW - Spatiotemporal patterns
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U2 - 10.1016/j.scitotenv.2017.02.202
DO - 10.1016/j.scitotenv.2017.02.202
M3 - Article
C2 - 28279878
AN - SCOPUS:85014469289
VL - 589
SP - 136
EP - 145
JO - Science of the Total Environment
JF - Science of the Total Environment
SN - 0048-9697
ER -