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DOI | 10.1175/JAS-D-16-0270.1 |
Electrification and Lightning in Idealized Simulations of a Hurricane-Like Vortex Subject to Wind Shear and Sea Surface Temperature Cooling | |
Fierro, Alexandre O.1,2; Mansell, Edward R.3 | |
2017-06-01 | |
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:6 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Relationships between intensity fluctuations, cloud microphysics, lightning variations, and electrical structures within idealized tropical cyclones are investigated with the cloud-resolving Collaborative Model for Multiscale Atmospheric Simulation (COMMAS). An initial strong tropical cyclone is subjected to either steady-state control conditions (CTRL), increased wind shear (SHEAR), or a reduction in sea surface temperature (SST). In CTRL, nearly all the lightning (>95%) occurred in the outer region (100 < r <= 300 km) and was overall very episodic in the inner core (r <= 100 km), consistent with observations. The inner-core updrafts were weaker and experienced greater depletion of cloud water by warm rain processes, which, in contrast to the deeper updrafts in the rainband convection, reduced the mixed-phase cloud depth and confined the bulk of the charging and lightning initiations to lower levels. Notably, larger flash rates were produced in the asymmetric inner core of the SHEAR case, with the majority of the flashes located in the downshear left quadrant, consistent with prior observational works. In contrast to CTRL, the more vigorous inner-core convection in SHEAR resulted in the formation of a prominent negative charge region and enhanced production of negative ground flashes. With a nearly identical filling rate as SHEAR, the introduction of cooler sea surface temperature in the SST case caused lightning activity to fade rapidly in both the inner core and rainbands. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000403101200019 |
WOS关键词 | TROPICAL CYCLONE INTENSIFICATION ; EXTRATROPICAL TRANSITION ; BULK MICROPHYSICS ; CHARGE STRUCTURE ; ICE SCATTERING ; INNER-CORE ; PART II ; MODEL ; STORM ; THUNDERSTORM |
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/29426 |
专题 | 地球科学 |
作者单位 | 1.Univ Oklahoma, Cooperat Inst Mesoscale Meteorol Studies, Norman, OK 73019 USA; 2.NOAA, Natl Severe Storms Lab, OAR, Norman, OK 73069 USA; 3.NOAA, Natl Severe Storms Lab, Norman, OK 73069 USA |
推荐引用方式 GB/T 7714 | Fierro, Alexandre O.,Mansell, Edward R.. Electrification and Lightning in Idealized Simulations of a Hurricane-Like Vortex Subject to Wind Shear and Sea Surface Temperature Cooling[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2017,74(6). |
APA | Fierro, Alexandre O.,&Mansell, Edward R..(2017).Electrification and Lightning in Idealized Simulations of a Hurricane-Like Vortex Subject to Wind Shear and Sea Surface Temperature Cooling.JOURNAL OF THE ATMOSPHERIC SCIENCES,74(6). |
MLA | Fierro, Alexandre O.,et al."Electrification and Lightning in Idealized Simulations of a Hurricane-Like Vortex Subject to Wind Shear and Sea Surface Temperature Cooling".JOURNAL OF THE ATMOSPHERIC SCIENCES 74.6(2017). |
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