大气和海洋科学快报（英文版）2021，Vol.14Issue(1)：1-6,6.
1990年代初东北8月极端高温频次的年代际减少
An interdecadal decrease in extreme heat days in August over Northeast China around the early 1990s
摘要
Abstract
Northeast China (NEC) witnessed an interdecadal increase in summer extreme heat days (EHDs) around the mid-1990s.The current study reveals that this interdecadal increase only occurs in June and July,while August features a unique interdecadal decrease in EHDs around the early 1990s.Plausible reasons for the interdecadal decrease in EHDs in August are further investigated.Results show that the interdecadal decrease in EHDs in August is due to the deceased variability of daily maximum temperature (Tmax).Overall,the variation of the Tmax over NEC in August is modulated by the Eurasian teleconnection pattern,Silk Road pattern,and East AsiaPacific pattern.However,the influence of the Silk Road pattern dramatically weakens after the early 1990s because the meridional wind variability along the westerly jet significantly decreases.The weakened influence of the Silk Road pattern contributes to the decreased Tmax variability over NEC.Meanwhile,the convection over the western North Pacific,which accompanies the East Asia-Pacific pattern,presents a significant decrease in variance after the early 1990s,further decreasing the Tmax variability over NEC.关键词
东北/极端高温/年代际变化/变率Key words
Northeast China/Extreme heat/Interdecadal/Variability引用本文复制引用
Wenjun Liu,Ruidan Chen,Zhiping Wen..1990年代初东北8月极端高温频次的年代际减少[J].大气和海洋科学快报（英文版）,2021,14(1):1-6,6.基金项目
This study was supported by the National Key R&D Program of China[grant number 2016YFA0600601],the Guangdong Basic and Applied Basic Research Foundation[grant number 2020A1515011572],and the National Natural Science Foundation of China[grant number 41605027]. （）
