DOI: 10.1007/s11069-021-04840-4
论文题名: Genesis and rapid weakening of tropical cyclone Lehar (2013)
作者: Rajasree V.P.M. ; Bhate J.N. ; Kesarkar A.P. ; Singh V.
刊名: Natural Hazards
ISSN: 0921030X
出版年: 2021
语种: 英语
中文关键词: Bottom-up pathway
; Dry air intrusion
; Mesoscale modeling
; Rapid weakening
; Tropical cyclogenesis
英文摘要: Tropical cyclogenesis and rapid weakening are subjects of considerable interest in the literature. This paper addresses the genesis and rapid weakening of a North Indian Ocean tropical cyclone Lehar (November 23–28, 2013). High-resolution analysis has been created by assimilating GPSRO observations using WRF and 3DVAR assimilation techniques. The parent disturbance of tropical cyclone Lehar is traced back using a moisture variable, and it is found to be originating from a westward-moving disturbance. The pathway of genesis is found to be bottom-up, with the vorticity developing from below. Tropical cyclone Lehar weakened from a Category 1 cyclone on November 26, 2013. We analyzed the prospects that contributed to the abrupt drop of tropical cyclone Lehar’s intensity in view of this. The analysis shows dust in the post-genesis (rapid weakening) environment of tropical cyclone Lehar. The analysis of total precipitable water in the post-genesis environment shows that the environment is very dry (< 45 kgm−2), and the spiral bands started disappearing under the influence of dry air intrusion. It has been found that the tropical cyclone Lehar is interacting with the dry air coming from the northern part of the Indian region during the post-genesis (rapid weakening) evolution, and the cyclone started weakening rapidly. The dry air advection from the north of the storm is a primary contributor to the weakening and high deep layer shear in the weakening environment. © 2021, The Author(s), under exclusive licence to Springer Nature B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169319
Appears in Collections: 气候变化与战略
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作者单位: National Atmospheric Research Laboratory, Gadanki, Chittoor District, Andhra Pradesh 517112, India; Centre for Atmospheric and Climate Physics Research, School of Physics, Engineering and Computer Science, University of Hertfordshire, College Lane, Hatfield, AL10 9AB, United Kingdom
Recommended Citation:
Rajasree V.P.M.,Bhate J.N.,Kesarkar A.P.,et al. Genesis and rapid weakening of tropical cyclone Lehar (2013)[J]. Natural Hazards,2021-01-01