An Abrupt Rainfall Decrease over the Asian Inland Plateau Region around 1999 and the Possible Underlying Mechanism

作     者：Jinling PIAO Wen CHEN Ke WEI Yong LIU Hans-F.GRAF Joong-Bae AHN Alexander POGORELTSEV 

作者机构：Center for Monsoon System ResearchInstitute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100190China School of Earth ScienceUniversity of the Chinese Academy of SciencesBeijing 100049China Department of Atmospheric SciencesPusan National UniversityPusan 609-735Korea Russian State Hydrometeorological UniversitySt.Petersburg 195196Russia 

出 版 物：《Advances in Atmospheric Sciences》 (大气科学进展（英文版）)

年 卷 期：2017年第34卷第4期

页      面：456-468页

核心收录：

学科分类：07[理学] 070601[理学-气象学] 0706[理学-大气科学] 0816[工学-测绘科学与技术] 0825[工学-航空宇航科学与技术] 

基　　金：supported jointly by the National Key Research and Development Program(Grant No.2016YFA0600604) the National Natural Science Foundation of China(Grant No.41461144001 and 41375046) Open Research Fund Program of Key Laboratory of Meteorological Disaster of Ministry of Education(Nanjing University of Information Science and Technology)Grant No.KLME1403 the Chinese Academy of Sciences President’s International Fellowship Initiative 

主　　题：Asian inland plateau summer rainfall drought teleconnection pattern North Atlantic 

摘      要：A decadal change in summer rainfall in the Asian inland plateau（AIP） region is identified around 1999. This decadal change is characterized by an abrupt decrease in summer rainfall of about 15.7% of the climatological average amount,leading to prolonged drought in the Asian inland plateau region. Both the surface air temperature and potential evapotranspiration in the AIP show a significant increase, while the soil moisture exhibits a decrease, after the late 1990s. Furthermore,the normalized difference vegetation index shows an apparent decreasing trend during 1999–2007. Three different drought indices—the standardized precipitation index, the standardized precipitation evapotranspiration index, and the self-calibrating Palmer drought severity index—present pronounced climate anomalies during 1999–2007, indicating dramatic drought exacerbation in the region after the late 1990s. This decadal change in the summer rainfall may be attributable to a wave-like teleconnection pattern from Western Europe to Asia. A set of model sensitivity experiments suggests that the summer warming sea surface temperature in the North Atlantic could induce this teleconnection pattern over Eurasia, resulting in recent drought in the AIP region.