气候变化领域集成服务门户(CCPortal): Subtropical Cyclone Formation via Warm Seclusion Development: The Importance of Surface Fluxes

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DOI	10.1029/2019JD031526
	Subtropical Cyclone Formation via Warm Seclusion Development: The Importance of Surface Fluxes
	Quitián-Hernández L.; González-Alemán J.J.; Santos-Muñoz D.; Fernández-González S.; Valero F.; Martín M.L.
发表日期	2020
ISSN	2169897X
卷号	125 期号:8
英文摘要	Subtropical cyclones (STCs) are characterized by a thermal hybrid structure with tropical and extratropical features. STCs are considered a numerical modeling challenge because of their rapid intensification. A fundamental part of their strength is derived from diabatic processes associated with convection and heat fluxes from the ocean. This study evaluates the importance of surface turbulent heat fluxes during the transition of an extratropical precursor into a STC. This cyclone evolved embedded within a strong meridional flow, having a Shapiro-Keyser structure and undergoing a warm seclusion process. To assess the importance of those heat fluxes, two Weather Research and Forecasting simulations were defined considering the presence and absence of those fluxes. Results of both simulations reveal a warm seclusion process, which weakened in absence of the heat fluxes. During the system genesis and in absence of heat fluxes, the wind and rainfall values were increased due to the remarkably intense area of frontogenesis to the northwest. Given these results and the lack of transition in the absence of heat fluxes, the frontal nature of the system was verified. Considering the heat fluxes, the obtained potential vorticity values diminished, reducing wind shear and intensifying convection in the system, which favored its transition into an STC. This study is groundbreaking in that no STC has been linked to a warm seclusion process in the Eastern North Atlantic. Additionally, simulated wind field shows an underestimation in comparison with Atmospheric Motion Vectors, used as observational data so as to give a weight to the wind analysis. ©2020. The Authors.
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186041
作者单位	Department of Astrophysics and Atmospheric Sciences, Faculty of Physics, Complutense University of Madrid, Madrid, Spain; Environmental Sciences Institute, University of Castilla-La Mancha, Toledo, Spain; State Meteorological Agency (AEMET), Madrid, Spain; Interdisciplinary Mathematical Institute (IMI), Complutense University of Madrid, Madrid, Spain; Department of Applied Mathematics, Faculty of Computer Engineering, University of Valladolid, Valladolid, Spain
推荐引用方式 GB/T 7714	Quitián-Hernández L.,González-Alemán J.J.,Santos-Muñoz D.,et al. Subtropical Cyclone Formation via Warm Seclusion Development: The Importance of Surface Fluxes[J],2020,125(8).
APA	Quitián-Hernández L.,González-Alemán J.J.,Santos-Muñoz D.,Fernández-González S.,Valero F.,&Martín M.L..(2020).Subtropical Cyclone Formation via Warm Seclusion Development: The Importance of Surface Fluxes.Journal of Geophysical Research: Atmospheres,125(8).
MLA	Quitián-Hernández L.,et al."Subtropical Cyclone Formation via Warm Seclusion Development: The Importance of Surface Fluxes".Journal of Geophysical Research: Atmospheres 125.8(2020).