Abstract
The extreme high winds, intense rainfall, large ocean waves, and copious sea spray in hurricanes push the surface-exchange parameters for temperature, water vapor, and momentum into untested regimes. The Coupled Boundary Layer Air-Sea Transfer (CBLAST)-Hurricane program is aimed at developing improved coupling parameterizations (using the observations collected during the CBLAST-Hurricane field program) for the next-generation hurricane research prediction models. Hurricane-induced surface waves that determine the surface stress are highly asymmetric, which can affect storm structure and intensity significantly. Much of the stress is supported by waves in the wavelength range of 0.1-10 m, which is the unresolved ''spectral tail'' in present wave models. A directional wind-wave coupling method is developed to include effects of directionality of the wind and waves in hurricanes. The surface stress vector is calculated using the two-dimensional wave spectra from a wave model with an added short-wave spectral tail. The wind and waves are coupled in a vector form rather than through the traditional roughness scalar. This new wind-wave coupling parameterization has been implemented in a fully coupled atmosphere-wave-ocean model with 1.67-km grid resolution in the atmospheric model, which can resolve finescale features in the extreme highwind region of the hurricane eyewall. It has been tested in a number of storms including Hurricane Frances (2004), which is one of the best-observed storms during the CBLAST-Hurricane 2004 field program. This paper describes the new wind-wave coupling parameterization and examines the characteristics of the coupled model simulations of Hurricane Frances (2004). Observations of surface waves and winds are used to evaluate the coupled model results.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 3198-3215 |
| Number of pages | 18 |
| Journal | Journal of the Atmospheric Sciences |
| Volume | 70 |
| Issue number | 10 |
| DOIs | |
| State | Published - 2013 |
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ASJC Scopus subject areas
- Atmospheric Science
Cite this
Directional wind-wave coupling in fully coupled atmosphere-wave-ocean models : Results from CBLAST-hurricane. / Chen, Shuyi S; Zhao, Wei; Donelan, Mark A.; Tolman, Hendrik L.
In: Journal of the Atmospheric Sciences, Vol. 70, No. 10, 2013, p. 3198-3215.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Directional wind-wave coupling in fully coupled atmosphere-wave-ocean models
T2 - Results from CBLAST-hurricane
AU - Chen, Shuyi S
AU - Zhao, Wei
AU - Donelan, Mark A.
AU - Tolman, Hendrik L.
PY - 2013
Y1 - 2013
N2 - The extreme high winds, intense rainfall, large ocean waves, and copious sea spray in hurricanes push the surface-exchange parameters for temperature, water vapor, and momentum into untested regimes. The Coupled Boundary Layer Air-Sea Transfer (CBLAST)-Hurricane program is aimed at developing improved coupling parameterizations (using the observations collected during the CBLAST-Hurricane field program) for the next-generation hurricane research prediction models. Hurricane-induced surface waves that determine the surface stress are highly asymmetric, which can affect storm structure and intensity significantly. Much of the stress is supported by waves in the wavelength range of 0.1-10 m, which is the unresolved ''spectral tail'' in present wave models. A directional wind-wave coupling method is developed to include effects of directionality of the wind and waves in hurricanes. The surface stress vector is calculated using the two-dimensional wave spectra from a wave model with an added short-wave spectral tail. The wind and waves are coupled in a vector form rather than through the traditional roughness scalar. This new wind-wave coupling parameterization has been implemented in a fully coupled atmosphere-wave-ocean model with 1.67-km grid resolution in the atmospheric model, which can resolve finescale features in the extreme highwind region of the hurricane eyewall. It has been tested in a number of storms including Hurricane Frances (2004), which is one of the best-observed storms during the CBLAST-Hurricane 2004 field program. This paper describes the new wind-wave coupling parameterization and examines the characteristics of the coupled model simulations of Hurricane Frances (2004). Observations of surface waves and winds are used to evaluate the coupled model results.
AB - The extreme high winds, intense rainfall, large ocean waves, and copious sea spray in hurricanes push the surface-exchange parameters for temperature, water vapor, and momentum into untested regimes. The Coupled Boundary Layer Air-Sea Transfer (CBLAST)-Hurricane program is aimed at developing improved coupling parameterizations (using the observations collected during the CBLAST-Hurricane field program) for the next-generation hurricane research prediction models. Hurricane-induced surface waves that determine the surface stress are highly asymmetric, which can affect storm structure and intensity significantly. Much of the stress is supported by waves in the wavelength range of 0.1-10 m, which is the unresolved ''spectral tail'' in present wave models. A directional wind-wave coupling method is developed to include effects of directionality of the wind and waves in hurricanes. The surface stress vector is calculated using the two-dimensional wave spectra from a wave model with an added short-wave spectral tail. The wind and waves are coupled in a vector form rather than through the traditional roughness scalar. This new wind-wave coupling parameterization has been implemented in a fully coupled atmosphere-wave-ocean model with 1.67-km grid resolution in the atmospheric model, which can resolve finescale features in the extreme highwind region of the hurricane eyewall. It has been tested in a number of storms including Hurricane Frances (2004), which is one of the best-observed storms during the CBLAST-Hurricane 2004 field program. This paper describes the new wind-wave coupling parameterization and examines the characteristics of the coupled model simulations of Hurricane Frances (2004). Observations of surface waves and winds are used to evaluate the coupled model results.
UR - http://www.scopus.com/inward/record.url?scp=84880714184&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84880714184&partnerID=8YFLogxK
U2 - 10.1175/JAS-D-12-0157.1
DO - 10.1175/JAS-D-12-0157.1
M3 - Article
AN - SCOPUS:84880714184
VL - 70
SP - 3198
EP - 3215
JO - Journals of the Atmospheric Sciences
JF - Journals of the Atmospheric Sciences
SN - 0022-4928
IS - 10
ER -