DOI: 10.1002/2014GL059584
论文题名: Vertical structure of tropical cyclones at onset of the rapid intensification in the HWRF model
作者: Kieu C. ; Tallapragada V. ; Hogsett W.
刊名: Geophysical Research Letters
ISSN: 0094-10074
EISSN: 1944-9805
出版年: 2014
卷: 41, 期: 9 起始页码: 3298
结束页码: 3306
语种: 英语
英文关键词: HWRF model
; onset of rapid intensification
; tropical cyclone intensification
Scopus关键词: Experiments
; Hurricanes
; Weather forecasting
; Dynamical structure
; Environment conditions
; Rapid intensification
; Thermodynamic structures
; Tropical cyclone
; Vertical structures
; Vortex structures
; Weather research
; Vortex flow
; environmental conditions
; numerical model
; relative humidity
; thermodynamics
; tropical cyclone
; vortex
; weather forecasting
英文摘要: In this study, the tropical cyclone structure at the onset of rapid intensification (RI) is examined using the cloud-permitting version of the Hurricane Weather Research and Forecast (HWRF) model. Idealized experiments with different vortex initial vertical structures in different environments show that the HWRF model vortex possesses a specific constraint in the dynamical and thermodynamic structure at the RI onset including (i) a warm anomaly of 1-3°K, (ii) a moist column with relative humidity>90% within the storm central region, and (iii) low-level tangential flow ≥12 m s-1. Regardless of vortex structures or environment conditions applied in this study, model vortex does not intensify if the above constraint is not established. Such a requirement in the model moisture and dynamical structure at the RI onset can explain why the RI onset is much delayed in dry experiments as compared to the onset in moist experiments. Key Points Tropical cyclones possess a specific structure at the onset of intensification Specific vortex structure at the RI onset determines the timing of the RI onset © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84901953124&doi=10.1002%2f2014GL059584&partnerID=40&md5=ae53e94021e818d5f09a6d2234fabbd0
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7338
Appears in Collections: 气候减缓与适应
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作者单位: Environmental Modeling Center, NOAA/NWS/NCEP, College Park, MD, United States
Recommended Citation:
Kieu C.,Tallapragada V.,Hogsett W.. Vertical structure of tropical cyclones at onset of the rapid intensification in the HWRF model[J]. Geophysical Research Letters,2014-01-01,41(9).