气候变化领域集成服务门户(CCPortal): The Role of Eyewall Turbulent Transport in the Pathway to Intensification of Tropical Cyclones

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DOI	10.1029/2021JD034983
	The Role of Eyewall Turbulent Transport in the Pathway to Intensification of Tropical Cyclones
	Zhu P.; Hazelton A.; Zhang Z.; Marks F.D.; Tallapragada V.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:17
英文摘要	In a tropical cyclone (TC), turbulence not only exists in the planetary boundary layer (PBL) but also can be generated above the PBL by the cloud processes in the eyewall and rainbands. It is found that the Hurricane Analysis and Forecast System (HAFS), a new multi-scale operational model for TC prediction, fails to capture the intense turbulent mixing in eyewall and rainband clouds due to a poor estimation of static stability in clouds. The problem is fixed by including the effects of multi-phase water in the stability calculation. Simulations of 21 TCs and tropical storms in the North Atlantic basin of 2016–2019 hurricane seasons totaling 118 forecast cycles show that the stability correction substantially improves HAFS's skill in predicting storm track and intensity. Analyses of HAFS's simulations of Hurricane Michael (2018) show that the positive tendency of vortex's tangential wind resulting from the radially inward transport of absolute vorticity dominates the eddy correlation tendencies induced by the model-resolved asymmetric eddies and serves as a main mechanism for the rapid intensification of Michael. The sub-grid scale (SGS) turbulent transport above the PBL in the eyewall plays a pivotal role in initiating a positive feedback among the eyewall convection, mean secondary overturning circulation, vortex acceleration via the inward transport of absolute vorticity, surface evaporation, and radial convergence of moisture in the PBL. Without the SGS transport above the PBL, the model-resolved vertical transport alone may not be sufficient in initiating the positive feedback underlying the rapid intensification of TCs. © 2021. The Authors.
英文关键词	eyewall; numerical simulation; parameterization; rapid intensification; tropical cyclone; turbulence
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/237026
作者单位	Department of Earth and Environment, Florida International University, Miami, FL, United States; Cooperative Institute for Marine and Atmospheric Studies, University of Miami, Miami, FL, United States; Hurricane Research Division, Atlantic Oceanographic and Meteorological Laboratory, NOAA, Miami, FL, United States; Environmental Modeling Center, National Centers for Environmental Prediction, NOAA, Miami, FL, United States
推荐引用方式 GB/T 7714	Zhu P.,Hazelton A.,Zhang Z.,et al. The Role of Eyewall Turbulent Transport in the Pathway to Intensification of Tropical Cyclones[J],2021,126(17).
APA	Zhu P.,Hazelton A.,Zhang Z.,Marks F.D.,&Tallapragada V..(2021).The Role of Eyewall Turbulent Transport in the Pathway to Intensification of Tropical Cyclones.Journal of Geophysical Research: Atmospheres,126(17).
MLA	Zhu P.,et al."The Role of Eyewall Turbulent Transport in the Pathway to Intensification of Tropical Cyclones".Journal of Geophysical Research: Atmospheres 126.17(2021).