Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.2010547117 |
Summertime stationary waves integrate tropical and extratropical impacts on tropical cyclone activity | |
Zhuo Wang; Gan Zhang; Timothy J. Dunkerton; Fei-Fei Jin | |
2020-08-31 | |
发表期刊 | Proceedings of the National Academy of Science
![]() |
出版年 | 2020 |
英文摘要 | Tropical cyclones (TC) are one of the most severe storm systems on Earth and cause significant loss of life and property upon landfall in coastal areas. A better understanding of their variability mechanisms will help improve the TC seasonal prediction skill and mitigate the destructive impacts of the storms. Early studies focused primarily on tropical processes in regulating the variability of TC activity, while recent studies suggest also some long-range impacts of extratropical processes, such as lateral transport of dry air and potential vorticity by large-scale waves. Here we show that stationary waves in the Northern Hemisphere integrate tropical and extratropical impacts on TC activity in July through October. In particular, tropical upper-tropospheric troughs (TUTTs), as part of the summertime stationary waves, are associated with the variability of large-scale environmental conditions in the tropical North Atlantic and North Pacific and significantly correlated to the variability of TC activity in these basins. TUTTs are subject to the modulation of diabatic heating in various regions and are the preferred locations for extratropical Rossby wave breaking (RWB). A strong TUTT in a basin is associated with enhanced RWB and tropical−extratropical stirring in that basin, and the resultant changes in the tropical atmospheric conditions modulate TC activity. In addition, the anticorrelation of TUTTs between the North Atlantic and North Pacific makes the TC activity indices over the two basins compensate each other, rendering the global TC activity less variable than otherwise would be the case if TUTTs were independent. |
领域 | 地球科学 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/293185 |
专题 | 地球科学 |
推荐引用方式 GB/T 7714 | Zhuo Wang,Gan Zhang,Timothy J. Dunkerton,et al. Summertime stationary waves integrate tropical and extratropical impacts on tropical cyclone activity[J]. Proceedings of the National Academy of Science,2020. |
APA | Zhuo Wang,Gan Zhang,Timothy J. Dunkerton,&Fei-Fei Jin.(2020).Summertime stationary waves integrate tropical and extratropical impacts on tropical cyclone activity.Proceedings of the National Academy of Science. |
MLA | Zhuo Wang,et al."Summertime stationary waves integrate tropical and extratropical impacts on tropical cyclone activity".Proceedings of the National Academy of Science (2020). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论