globalchange  > 过去全球变化的重建
DOI: 10.1007/s00382-016-3302-5
Scopus记录号: 2-s2.0-84983000135
论文题名:
On the coupling between precipitation and potential evapotranspiration: contributions to decadal drought anomalies in the Southwest China
作者: Sun S.; Chen H.; Ju W.; Wang G.; Sun G.; Huang J.; Ma H.; Gao C.; Hua W.; Yan G.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2017
卷: 48, 期:2017-11-12
起始页码: 3779
结束页码: 3797
语种: 英语
英文关键词: Decadal anomaly ; Drought ; Potential evapotranspiration ; Southwest China ; SPEI
英文摘要: Under the exacerbation of climate change, climate extreme events, especially for drought, happened frequently and intensively across the globe with greater spatial differences. We used the Standardized Precipitation-Evapotranspiration Index computed from the routine meteorological observations at 269 sites in Southwest China (SWC) to study the drought characteristics (e.g., extent, duration and intensity) and their decadal variations during 1971–2012. It was revealed that the drought, in responses to the coupling between decadal precipitation and potential evapotranspiration (PET) anomalies, differed among regions and periods. For the entire SWC, droughts in 1970s and 2000s+ was generally stronger than in 1980s and 1990s with respect to their spatial extent, duration and intensity, especially in 2000s+. It was well-known that drought was closely related with a lack of precipitation; however, the impact of atmospheric demand of evaporation (reflected by PET here) on drought (e.g., duration and intensity) was rarely paid enough attentions. To that end, a spatial multi-linear regression approach was proposed in this study for quantifying the contributions of decadal PET and precipitation variations to drought duration and intensity. We have found that the contributions of decadal PET anomalies to drought duration and intensity could exceed those of precipitation, e.g., during 1980s and 1990s in SWC. Additionally, despite the strongest droughts in 2000s+, it was suggested that PET could exert comparable impacts on drought anomalies as precipitation. All these findings implied that PET plays a critical role in drought event, which acts to amplify drought duration and intensity. To sum up, this study stressed the need for enough attentions for PET processes in drought studies. © 2016, Springer-Verlag Berlin Heidelberg.
资助项目: NSFC, National Natural Science Foundation of China ; NSFC, National Natural Science Foundation of China ; NSFC, National Natural Science Foundation of China ; NSFC, National Natural Science Foundation of China ; Natural Science Foundation of Jiangsu Province ; Natural Science Foundation of Jiangsu Province
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53187
Appears in Collections:过去全球变化的重建

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作者单位: Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Key Laboratory of Meteorological Disaster, Ministry of Education/International Joint Research Laboratory on Climate and Environment Change, Nanjing University of Information Science and Technology (NUIST), Nanjing, China; Applied Hydrometeorological Research Institute, NUIST, Nanjing, China; International Institute for Earth System Science (ESSI), Nanjing University, Nanjing, China; School of Geography and Remote Sensing, NUIST, Nanjing, China; United States Department of Agriculture Forest Services, Eastern Forest Environmental Threat Assessment Center, Southern Research Station, Raleigh, NC, United States; School of Applied Meteorology, NUIST, Nanjing, China

Recommended Citation:
Sun S.,Chen H.,Ju W.,et al. On the coupling between precipitation and potential evapotranspiration: contributions to decadal drought anomalies in the Southwest China[J]. Climate Dynamics,2017-01-01,48(2017-11-12)
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