Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-18-0335.1 |
Impact of Stratiform Rainband Heating on the Tropical Cyclone Wind Field in Idealized Simulations | |
Yu, Chau-Lam; Didlake, Anthony C., Jr. | |
2019-08-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2019 |
卷号 | 76期号:8页码:2443-2462 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Using idealized simulations, we examine the storm-scale wind field response of a dry, hurricane-like vortex to prescribed stratiform heating profiles that mimic tropical cyclone (TC) spiral rainbands. These profiles were stationary with respect to the storm center to represent the diabatic forcing imposed by a quasi-stationary rainband complex. The first profile was typical of stratiform precipitation with heating above and cooling below the melting level. The vortex response included a mesoscale descending inflow and a midlevel tangential jet, consistent with previous studies. An additional response was an inward-spiraling low-level updraft radially inside the rainband heating. The second profile was a modified stratiform heating structure derived from observations and consisted of a diagonal dipole of heating and cooling. The same features were found with stronger magnitudes and larger vertical extents. The dynamics and implications of the forced low-level updraft were examined. This updraft was driven by buoyancy advection because of the stratiform-induced low-level cold pool. The stationary nature of the rainband diabatic forcing played an important role in modulating the required temperature and pressure anomalies to sustain this updraft. Simulations with moisture and full microphysics confirmed that this low-level updraft response was robust and capable of triggering sustained deep convection that could further impact the storm evolution, including having a potential role in secondary eyewall formation. |
英文关键词 | Dynamics Hurricanes Hurricanes typhoons Numerical analysis modeling |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000477019800001 |
WOS关键词 | CONCENTRIC EYEWALL FORMATION ; SECONDARY EYEWALL ; PART I ; SPIRAL RAINBANDS ; STORM MOTION ; DYNAMICS ; MESOSCALE ; CONVECTION ; SHEAR ; PRECIPITATION |
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/185755 |
专题 | 地球科学 |
作者单位 | Penn State Univ, Dept Meteorol & Atmospher Sci, University Pk, PA 16802 USA |
推荐引用方式 GB/T 7714 | Yu, Chau-Lam,Didlake, Anthony C., Jr.. Impact of Stratiform Rainband Heating on the Tropical Cyclone Wind Field in Idealized Simulations[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2019,76(8):2443-2462. |
APA | Yu, Chau-Lam,&Didlake, Anthony C., Jr..(2019).Impact of Stratiform Rainband Heating on the Tropical Cyclone Wind Field in Idealized Simulations.JOURNAL OF THE ATMOSPHERIC SCIENCES,76(8),2443-2462. |
MLA | Yu, Chau-Lam,et al."Impact of Stratiform Rainband Heating on the Tropical Cyclone Wind Field in Idealized Simulations".JOURNAL OF THE ATMOSPHERIC SCIENCES 76.8(2019):2443-2462. |
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