气候变化领域集成服务门户(CCPortal): Impact of vortex size and Initialization on prediction of landfalling tropical cyclones over Bay of Bengal

CCPortal

DOI	10.1016/j.atmosres.2019.03.014
	Impact of vortex size and Initialization on prediction of landfalling tropical cyclones over Bay of Bengal
	Busireddy N.K.R.; Nadimpalli R.; Osuri K.K.; Ankur K.; Mohanty U.C.; Niyogi D.
发表日期	2019
ISSN	0169-8095
起始页码	18
结束页码	29
卷号	224
英文摘要	This study focuses on improving the vortex of Tropical Cyclone (TC) using different initialization techniques and its subsequent impact on the performance of Advanced Research Weather Research and Forecasting (ARW) mesoscale model. The Initialization of TC vortex from global analyses (CNTL) is found to be poor due to coarse horizontal and vertical structure, and is improved by assimilating available observations using 3DVAR technique (3DV). In another experiment (VAR_VI), vortex is corrected using vortex initialization and relocation procedures to correspond with India Meteorological Department (IMD) ‘observed’ position and intensity estimates, and then assimilation of additional observations is undertaken. The initial vortex improvement in terms of horizontal and vertical structure is noted in both experiments with the VAR_VI results being better than for the 3DV experiment. Simulations following the VAR_VI experiment showed remarkable improvement in simulating track, intensity and structure of the two TCs it was evaluated for (TC Giri and TC Jal). The large scale dynamical and thermo-dynamical fields such as steering flow, vertical wind shear and warm core structure were also improved. For TC Giri, the VAR_VI could reproduce the observed intensification rate of 10 ms −1 within 12 h, while for TC Jal, the VAR_VI run could simulate the inland rainfall due to sheared convective clouds. Results suggested that the improvements would likely to be more for stronger TCs. This study highlights the continued need and value of improvement of TC vortex using initialization and in-situ and remote sensing observations over the Bay of Bengal region. © 2019 Elsevier B.V.
英文关键词	3DVAR; ARW model; Bay of Bengal; Tropical cyclones; Vortex initialization and relocation; Vortex size
语种	英语
scopus关键词	Hurricanes; Remote sensing; Shear flow; Storms; Tropics; Weather forecasting; 3DVAR; Bay of Bengal; Initialization technique; Landfalling tropical cyclones; Relocation procedures; Tropical cyclone; Vortex size; Weather research and forecasting; Vortex flow; convective cloud; prediction; rainfall; three-dimensional modeling; tropical cyclone; vortex; weather forecasting; wind shear; Bay of Bengal; Indian Ocean
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162019
作者单位	Department of Earth and Atmospheric Sciences, NIT, Rourkela, Odisha 769008, India; School of Earth Ocean and Climate Sciences, IIT, Bhubaneswar, Odisha 752050, India; Department of Agronomy and Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, West Lafayette, IN 47907, United States
推荐引用方式 GB/T 7714	Busireddy N.K.R.,Nadimpalli R.,Osuri K.K.,et al. Impact of vortex size and Initialization on prediction of landfalling tropical cyclones over Bay of Bengal[J],2019,224.
APA	Busireddy N.K.R.,Nadimpalli R.,Osuri K.K.,Ankur K.,Mohanty U.C.,&Niyogi D..(2019).Impact of vortex size and Initialization on prediction of landfalling tropical cyclones over Bay of Bengal.Atmospheric Research,224.
MLA	Busireddy N.K.R.,et al."Impact of vortex size and Initialization on prediction of landfalling tropical cyclones over Bay of Bengal".Atmospheric Research 224(2019).