期刊文献+

2018:The Hottest Summer in China and Possible Causes

收藏 分享 导出
摘要 In 2018,China experienced the hottest summer since 1961.The maximum,mean,and minimum temperatures all reached the highest.Air temperatures in most regions were much higher than normal;in northern China especially,the temperature anomalies were above double of the standard deviations.Consistent variations of temperature anomalies appeared in the national mean and in northern China on different timescales from intraseasonal to annual,indicating that the above normal temperature in northern China contributed significantly to the record-breaking hot summer of entire China.Relationships among the high temperature in summer 2018,the tropospheric circulation,and the global sea surface temperatures(SSTs)are further analyzed.It is found that the intensified and more northward western Pacific subtropical high(WPSH),weakened Northeast China cold vortex(NECV),and positive geopotential height anomaly from northern China to the Sea of Japan resulted in the abnormally high temperature in summer 2018.From late July to mid August,the WPSH was stronger than normal,with its ridge line jumping to north of 40°N;meanwhile,the NECV was much weaker and more northward than normal;both of the two systems led to the persistent high temperature in northern China during this period.In addition,the SSTs in Kuroshio and its extension area(K–KE)in summer 2018 were also the highest since 1961 and the greatest positive SST anomaly in K–KE was favorable for the above normal geopotential height over North China–Northeast China–Japan at 500 hPa,giving rise to the exceptionally high temperature in northern China.
出处 《气象学报:英文版》 SCIE CSCD 2019年第4期577-592,共16页 JOURNAL OF METEOROLOGICAL RESEARCH
基金 Supported by the National Key Research and Development Program of China(2018YFC1505603) National Science and Technology Support Program of China(2015BAC03B04) Youth Talent Development Program of China Meteorological Administration(CMA),National Natural Science Foundation of China(41205039 and 41776039) Forecasters5 Project of CMA(CM AYB Y2019-149).
作者简介 Corresponding author:Hui GAO,gaohui@cma.gov.cn.
  • 相关文献
投稿分析

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部 意见反馈