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2019年3月 气 候 与 环 境 研 究 Climatic and Environmental Rearch V ol. 24, No. 2Mar. 2019
梁靖琳, 雒佳丽, 田红瑛, 等. 2019. “05·6”华南持续性暴雨发生前上对流层及平流层异常信号分析 [J]. 气候与环境研究, 24 (2): 237−250. Liang Jinglin, Luo Jiali, Tian Hongying, et al. 2019. Analysis of abnormal signals in the upper troposphere and stratosphere before the persistent heavy rainfall event in South China in June 2005 [J]. Climatic and Environmental Rearch (in Chine), 24 (2): 237−250, doi:10.3878/j.issn.1006-9585.2018.17164.
“05·6”华南持续性暴雨发生前上对流层及
平流层异常信号分析
梁靖琳1 雒佳丽1 田红瑛1 张诗妍1 张如华1 商林
2 1兰州大学大气科学学院/半干旱气候变化教育部重点实验室,兰州730000
斯达康2山东省气候中心,济南250031
距离过年还有多少天外向英语
摘 要 利用欧洲中心ERA-Interim 再分析资料,对“05·6”华南持续性暴雨发生前上对流层及平流层信号进行分析。分析结果表明,暴雨发生前一周,暴雨区域上空对流层顶高度出现先降低后升高再降低的变化,这种变化与日本南部的位涡异常存在较好的对应关系,即我国中纬度沿海一带至日本的高位涡带向华南延伸,使得华南地区上空的位涡升高,对流层顶下降。在环流场中,本次暴雨发生前低纬地区上对流层下平流层(UTLS )区域的东风与1991~2010年平均值相比偏强偏北,华南地区上空平流层东风场也偏强,平流层低层东风在暴雨发生前第9天提早向下传播;位势高度场中,“05·6”华南暴雨发生前中低纬度100 hPa 上的南亚高压中心位置偏东偏南;华南地区UTLS 区域有较强的位势高度场正异常,在暴雨发生前随时间出现两次明显的加强,但在暴雨发生后减弱。南亚高压中心位置的偏移、东风信号的提早下传、高位涡空气入侵华南均有利于降水的发生。
关键词 华南暴雨 上对流层 平流层
文章编号 1006-9585(2019)02-0237-14 中图分类号 P426.6 文献标识码 A doi:10.3878/j.issn.1006-9585.2018.17164
Analysis of Abnormal Signals in the Upper Troposphere and Stratosphere before the Persistent Heavy Rainfall Event in South China in June 2005
LIANG Jinglin 1, LUO Jiali 1, TIAN Hongying 1, ZHANG Shiyan 1, ZHANG Ruhua 1,
and SHANG Lin 1
1 Key Laboratory of Semi-Arid Climate Change of the Ministry of Education , College of Atmospheric Sciences, Lanzhou University , Lanzhou 730000
酸菜炖大骨头
正定景点2 Shandong Provincial Climate Center , Jinan 250031
Abstract Using the ERA-Interim reanalysis data, the upper tropospheric and stratospheric signals before the “05·6” heavy rainfall event in South China are analyzed. The results show that before the heavy rain, the tropopau over the rainfall region exhibited a lower-lift-lower trend that was consistent with the evolution of potential vorticity (PV) anomalies over southern Japan. Specifically, a relatively high PV belt over Japan extended southward and led to higher PV (lower tropopau) over southern China. Compared with the mean values between 1991 and 2010, easterly winds in the upper troposphere and lower stratosphere (UTLS) over the subtropical region were stronger and located more
收稿日期 2017-11-17;网络预出版日期 2018-05-21
作者简介 梁靖琳,女,1995年出生,硕士研究生,主要从事平流层过程对天气气候影响研究。E-mail: liangjl17@lzu.edu
管三
通讯作者 雒佳丽,E-mail: luojl@lzu.edu
火锅怎么做好吃又简单的做法
资助项目 国家自然科学基金项目 41705021、41575038、41630421
Funded by National Natural Science Foundation of China (Grants 41705021, 41575038, and 41630421)