Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-16-0117.1 |
Tropical Cyclone Outflow-Layer Structure and Balanced Response to Eddy Forcings | |
Ditchek, Sarah D.; Molinari, John; Vollaro, David | |
2017 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
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ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2017 |
卷号 | 74期号:1 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The ERA-Interim is used to generate azimuthally averaged composites of Atlantic basin tropical cyclones from 1979 to 2014. Both the mean state and the eddy forcing terms exhibited similar radial-vertical structure for all storm intensities, varying only in magnitude. Thus, only major hurricanes are described in detail. Radial inflow and outflow extended beyond the 2000-km radius. Warm anomalies reached 2000 km in the outflow layer. Composite eddy momentum fluxes within the outflow layer were 2.5 times larger than mean momentum fluxes, highlighting the importance of outflow-environment interactions. A balanced vortex equation was applied to understand the role of eddy heat and momentum fluxes. Dominant terms were the lateral eddy heat flux convergence, lateral eddy momentum flux, and eddy Coriolis torque. Each acted to enhance the secondary circulation. The eddy momentum flux terms produced about twice the response of heat flux terms. The circulation created by the eddy Coriolis torque arises from a vertical gradient of mean storm-relative meridional wind in the upper troposphere at outer radii. It is produced by background inertial stability variations that allow stronger outflow on the equatorward side. Overall, the fluxes drive a strengthened secondary circulation that extends to outer radii. Balanced vertical motion is strongest in the upper troposphere in the storm core. A method is proposed for evaluating the role of environmental interaction on tropical cyclone intensity change. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000392419300008 |
WOS关键词 | AXISYMMETRICAL NUMERICAL-MODEL ; SEA INTERACTION THEORY ; HURRICANE INTENSITY ; EXTERNAL INFLUENCES ; STORM STRUCTURE ; LIFE-CYCLE ; ENERGETICS ; MOMENTUM ; DYNAMICS ; FLUXES |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
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/29596 |
专题 | 地球科学 |
作者单位 | SUNY Albany, Dept Atmospher & Environm Sci, Albany, NY 12222 USA |
推荐引用方式 GB/T 7714 | Ditchek, Sarah D.,Molinari, John,Vollaro, David. Tropical Cyclone Outflow-Layer Structure and Balanced Response to Eddy Forcings[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2017,74(1). |
APA | Ditchek, Sarah D.,Molinari, John,&Vollaro, David.(2017).Tropical Cyclone Outflow-Layer Structure and Balanced Response to Eddy Forcings.JOURNAL OF THE ATMOSPHERIC SCIENCES,74(1). |
MLA | Ditchek, Sarah D.,et al."Tropical Cyclone Outflow-Layer Structure and Balanced Response to Eddy Forcings".JOURNAL OF THE ATMOSPHERIC SCIENCES 74.1(2017). |
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