Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-17-0272.1 |
On the Dynamics of Tropical Cyclone and Trough Interactions | |
Komaromi, William A.; Doyle, James D. | |
2018-08-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
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ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2018 |
卷号 | 75期号:8页码:2687-2709 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The interaction between a tropical cyclone (TC) and an upper-level trough is simulated in an idealized framework using Coupled Ocean-Atmosphere Mesoscale Prediction System (COAMPS) for Tropical Cyclones (COAMPS-TC) on a plane. We explore the effect of the trough on the environment, structure, and intensity of the TC. In a simulation that does not have a trough, environmental inertial stability is dominated by Coriolis, and outflow remains preferentially directed equatorward throughout the simulation. In the presence of a trough, negative storm-relative tangential wind in the base of the trough reduces the inertial stability such that the outflow shifts from equatorward to poleward. This interaction results in a similar to 24-h period of enhanced upper-level divergence coincident with intensification of the TC. Sensitivity tests reveal that if the TC is too far from the trough, favorable interaction does not occur. If the TC is too close to the trough, the storm weakens because of enhanced vertical wind shear. Only when the relative distance between the TC and the trough is 0.2-0.3 times the wavelength of the trough in x and 0.8-1.2 times the amplitude of the trough in y does favorable interaction and TC intensification occur. However, stochastic effects make it difficult to isolate the intensity change associated directly with the trough interaction. Outflow is found to be predominantly ageostrophic at small radii and deflects to the right (in the Northern Hemisphere) since it is unbalanced. The outflow becomes predominantly geostrophic at larger radii but not before a rightward deflection has already occurred. This finding sheds light on why the outflow accelerates toward but generally never reaches the region of lowest inertial stability. |
英文关键词 | Stability Tropical cyclones Troughs Numerical analysis modeling |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000439546900003 |
WOS关键词 | UPPER-TROPOSPHERIC TROUGHS ; SEASON TYPHOON DEVELOPMENT ; ANGULAR-MOMENTUM FLUXES ; VERTICAL SHEAR ; OUTFLOW LAYER ; HURRICANE INTENSITY ; EXTERNAL INFLUENCES ; ENVIRONMENTAL-INFLUENCES ; SUPERTYPHOON FLO ; PART I |
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/29237 |
专题 | 地球科学 |
作者单位 | US Navy, Res Lab, Monterey, CA 93943 USA |
推荐引用方式 GB/T 7714 | Komaromi, William A.,Doyle, James D.. On the Dynamics of Tropical Cyclone and Trough Interactions[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2018,75(8):2687-2709. |
APA | Komaromi, William A.,&Doyle, James D..(2018).On the Dynamics of Tropical Cyclone and Trough Interactions.JOURNAL OF THE ATMOSPHERIC SCIENCES,75(8),2687-2709. |
MLA | Komaromi, William A.,et al."On the Dynamics of Tropical Cyclone and Trough Interactions".JOURNAL OF THE ATMOSPHERIC SCIENCES 75.8(2018):2687-2709. |
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