How Does Tropical Cyclone Size Affect the Onset Timing of Secondary Eyewall Formation?

Guan, Liang; Ge, Xiaojia

doi:10.1007/s13351-018-7023-z

Cited by 4 publications

(2 citation statements)

References 38 publications

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“…Note that the timing of the defined SEF here also corresponds to the appearance of the secondary maximum wind speed in the boundary layer (not shown). The earlier SEF in the initially larger TC is consistent with a previous study [15] . Second, the intensity change during the ERC is considerably more rapid in exp2 than in exp1 (see further quantification below).…”

Section: An Overview Of the Simulated Tc Structure And Intensity Evol...supporting

confidence: 92%

“…However, because of the complexity of TC intensity change induced by the ERCs, further understanding of the factors and processes that lead to large differences in TC intensity change during the ERCs is still required. Although some previous studies indicated the importance of the initial TC vortex structure to the timing of the SEF [14,15] , few studies have carefully examined the dependence of the intensity change during the ERC on the initial TC vortex. This study focuses on the possible effects of the TC structural differences on intensity change during the ERC based on idealized numerical simulations.…”

Section: Introductionmentioning

confidence: 99%

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Effect of the Initial Vortex Structure on Intensity Change During Eyewall Replacement Cycle of Tropical Cyclones: A Numerical Study

YANG,

WANG,

WANG

et al. 2024

JTM

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This study investigates the effect of the initial tropical cyclone (TC) vortex structure on the intensity change during the eyewall replacement cycle (ERC) of TCs based on two idealized simulations using the Weather Research and Forecasting (WRF) model. Results show that an initially smaller TC with weaker outer winds experienced a much more drastic intensity change during the ERC than an initially larger TC with stronger outer winds. It is found that an initially larger TC vortex with stronger outer winds favored the development of more active spiral rainbands outside the outer eyewall, which slowed down the contraction and intensification of the outer eyewall and thus prolonged the duration of the concentric eyewall and slow intensity evolution. In contrast, the initially smaller TC with weaker outer winds corresponded to higher inertial stability in the inner core and weaker inertial stability but stronger filamentation outside the outer eyewall. These led to stronger boundary layer inflow, stronger updraft and convection in the outer eyewall, and suppressed convective activity outside the outer eyewall. These resulted in the rapid weakening during the formation of the outer eyewall, followed by a rapid re-intensification of the TC during the ERC. Our study demonstrates that accurate initialization of the TC structure in numerical models is crucial for predicting changes in TC intensity during the ERC. Additionally, monitoring the activity of spiral rainbands outside the outer eyewall can help to improve short-term intensity forecasts for TCs experiencing ERCs.

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Section: An Overview Of the Simulated Tc Structure And Intensity Evol...supporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Effect of the Initial Vortex Structure on Intensity Change During Eyewall Replacement Cycle of Tropical Cyclones: A Numerical Study

YANG,

WANG,

WANG

et al. 2024

JTM

View full text Add to dashboard Cite

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The size characteristics and physical explanation for the radius of maximum wind of hurricanes

Ren

Dudhia

2022

Atmospheric Research

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Impacts of raindrop evaporative cooling on tropical cyclone secondary eyewall formation

Guan

Yan

2018

Dynamics of Atmospheres and Oceans

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How Does Tropical Cyclone Size Affect the Onset Timing of Secondary Eyewall Formation?

Cited by 4 publications

References 38 publications

Effect of the Initial Vortex Structure on Intensity Change During Eyewall Replacement Cycle of Tropical Cyclones: A Numerical Study

Effect of the Initial Vortex Structure on Intensity Change During Eyewall Replacement Cycle of Tropical Cyclones: A Numerical Study

The size characteristics and physical explanation for the radius of maximum wind of hurricanes

Impacts of raindrop evaporative cooling on tropical cyclone secondary eyewall formation

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