A New Parametric Tropical Cyclone Tangential Wind Profile Model

Wood, Vincent T.; White, Luther W.; Willoughby, H. E.; Jorgensen, David P.

doi:10.1175/mwr-d-12-00115.1

Cited by 40 publications

(26 citation statements)

References 49 publications

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“…The SFMR radar can potentially provide along-track mapping of wind speeds at relatively high temporal (1 Hz) and spatial (~120 m) resolutions. The root-mean-square errors of the SFMR winds are less than 4 m/s~5 m/s [17,20], with validations of the measurements from dropwindsonde and an in situ instrument. …”

Section: Data Setsmentioning

confidence: 75%

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Symmetric Double-Eye Structure in Hurricane Bertha (2008) Imaged by SAR

Zhang¹,

Perrie²

2018

Remote Sensing

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Abstract:Internal dynamical processes play a critical role in hurricane intensity variability. However, our understanding of internal storm processes is less well established, partly because of fewer observations. In this study, we present an analysis of the hurricane double-eye structure imaged by the RADARSAT-2 cross-polarized synthetic aperture radar (SAR) over Hurricane Bertha (2008). SAR has the capability of hurricane monitoring because of the ocean surface roughness induced by surface wind stress. Recently, the C-band cross-polarized SAR measurements appear to be unsaturated for the high wind speeds, which makes SAR suitable for studies of the hurricane internal dynamic processes, including the double-eye structure. We retrieve the wind field of Hurricane Bertha (2008), and then extract the closest axisymmetric double-eye structure from the wind field using an idealized vortex model. Comparisons between the axisymmetric model extracted wind field and SAR observed winds demonstrate that the double-eye structure imaged by SAR is relatively axisymmetric. Associated with airborne measurements using a stepped-frequency microwave radiometer, we investigate the hurricane internal dynamic process related to the double-eye structure, which is known as the eyewall replacement cycle (ERC). The classic ERC theory was proposed by assuming an axisymmetric storm structure. The ERC internal dynamic process of Hurricane Bertha (2008) related to the symmetric double-eye structure here, which is consistent with the classic theory, is observed by SAR and aircraft.

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Section: Data Setsmentioning

confidence: 75%

“…The modified SHEW model for a double-eye structure is based on the one-dimensional modified Rankine vortex functions [3,4,17] and double circles for the eyewalls containing maximum wind speeds. We organize the remainder of this paper as follows.…”

Section: Introductionmentioning

confidence: 99%

Symmetric Double-Eye Structure in Hurricane Bertha (2008) Imaged by SAR

Zhang¹,

Perrie²

2018

Remote Sensing

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“…Many parametric typhoon models have been developed to provide meteorological information for storm surge or storm wave modeling [41][42][43][44][45][46]. Since the authors of [47] found that the analytical models provided very similar results, the parametric typhoon model proposed in [43] was employed:…”

Section: Model Forcingmentioning

confidence: 99%

Hazard Assessment of Typhoon-Driven Storm Waves in the Nearshore Waters of Taiwan

Chang

Shih

Chen

et al. 2018

Water

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Abstract:In Taiwan, the coastal hazard from typhoon-induced storm waves poses a greater threat to human life and infrastructure than storm surges. Therefore, there has been increased interest in assessing the storm wave hazard levels for the nearshore waters of Taiwan. This study hindcasted the significant wave heights (SWHs) of 124 historical typhoon events from 1978 to 2017 using a fully coupled model and hybrid wind fields (a combination of the parametric typhoon model and reanalysis products). The maximum SWHs of each typhoon category were extracted to create individual storm wave hazard maps for the sea areas of the coastal zones (SACZs) in Taiwan. Each map was classified into five hazard levels (I to V) and used to generate a comprehensive storm wave hazard map. The results demonstrate that the northern and eastern nearshore waters of Taiwan are threatened by a hazard level IV (SWHs ranging from 9.0 to 12.0 m) over a SACZ of 510.0 km 2 and a hazard level V (SWHs exceeding 12.0 m) over a SACZ of 2152.3 km 2 . The SACZs threatened by hazard levels I (SWHs less than 3.0 m), II (SWHs ranging from 3.0 to 6.0 m), and III (SWHs ranging from 6.0-9.0 m) are of 1045.2 km 2 , 1793.9 km 2 , and 616.1 km 2 , respectively, and are located in the western waters of Taiwan.

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“…A common way to generate wind and air pressure fields for typhoons is to reconstruct them using the analytical parametric cyclone model. Over the years, many parametric cyclone models have been developed to provide meteorological information for storm surge modeling [43][44][45][46][47][48]. Jakobsen and Madsen [49] investigated and compared parametric cyclone models based on cyclone position, central pressure, maximum wind speed and radius to maximum wind speed.…”

Section: Parametric Cyclone Modelmentioning

confidence: 99%

Simulation of Typhoon-Induced Storm Tides and Wind Waves for the Northeastern Coast of Taiwan Using a Tide–Surge–Wave Coupled Model

Chen

Lin

Jang

et al. 2017

Water

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Abstract:The storm tide is a combination of the astronomical tide and storm surge, which is the actual sea water level leading to flooding in low-lying coastal areas. A full coupled modeling system (Semi-implicit Eulerian-Lagrangian Finite-Element model coupled with Wind Wave Model II, SELFE-WWM-II) for simulating the interaction of tide, surge and waves based on an unstructured grid is applied to simulate the storm tide and wind waves for the northeastern coast of Taiwan. The coupled model was driven by the astronomical tide and consisted of main eight tidal constituents and the meteorological forcings (air pressure and wind stress) of typhoons. SELFE computes the depth-averaged current and water surface elevation passed to WWM-II, while WWM-II passes the radiation stress to SELFE by solving the wave action equation. Hindcasts of wind waves and storm tides for five typhoon events were developed to validate the coupled model. The detailed comparisons generally show good agreement between the simulations and measurements. The contributions of surge induced by wave and meteorological forcings to the storm tide were investigated for Typhoon Soudelor (2015) at three tide gauge stations. The results reveal that the surge contributed by wave radiation stress was 0.55 m at Suao Port due to the giant offshore wind wave (exceeding 16.0 m) caused by Typhoon Soudelor (2015) and the steep sea-bottom slope. The air pressure resulted in a 0.6 m surge at Hualien Port because of an inverted barometer effect. The wind stress effect was only slightly significant at Keelung Port, contributing 0.22 m to the storm tide. We conclude that wind waves should not be neglected when modeling typhoon-induced storm tides, especially in regions with steep sea-bottom slopes. In addition, accurate tidal and meteorological forces are also required for storm tide modeling.

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A New Parametric Tropical Cyclone Tangential Wind Profile Model

Cited by 40 publications

References 49 publications

Symmetric Double-Eye Structure in Hurricane Bertha (2008) Imaged by SAR

Symmetric Double-Eye Structure in Hurricane Bertha (2008) Imaged by SAR

Hazard Assessment of Typhoon-Driven Storm Waves in the Nearshore Waters of Taiwan

Simulation of Typhoon-Induced Storm Tides and Wind Waves for the Northeastern Coast of Taiwan Using a Tide–Surge–Wave Coupled Model

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