Effects of Swell Waves on Atmospheric Boundary Layer Turbulence: A Low Wind Field Study

Zou, Zhongshui; Song, Jinbao; Li, Peiliang; Huang, Jian; Zhang, Jun A.; Wan, Zhanhong; Li, Shuiqing

doi:10.1029/2019jc015153

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i

Effects of Swell Waves on Atmospheric Boundary Layer Turbulence: A Low Wind Field Study

2019
By Zou, Zhongshui ; Song, Jinbao ; Li, Peiliang ; ...
Source: Journal of Geophysical Research: Oceans, 124(8), 5671-5685.

[PDF-2.71 MB]

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Journal Title:

Journal of Geophysical Research: Oceans
Personal Author:

Zou, Zhongshui ; Song, Jinbao ; Li, Peiliang ; Huang, Jian ; Zhang, Jun A. ; ... More +

Zou, Zhongshui ; Song, Jinbao ; Li, Peiliang ; Huang, Jian ; Zhang, Jun A. ; Wan, Zhanhong ; Li, Shuiqing Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; AOML (Atlantic Oceanographic and Meteorological Laboratory) ; CIMAS (Cooperative Institute for Marine and Atmospheric Studies)

OAR (Oceanic and Atmospheric Research) ; AOML (Atlantic Oceanographic and Meteorological Laboratory) ; CIMAS (Cooperative Institute for Marine and Atmospheric Studies) Less -
Description:

The effect of swell waves on atmospheric boundary layer turbulence under low winds was explored using data from a fixed platform located in the South China Sea. The wind spectra, cospectra, and Ogive curve measured at a height of 8 m above the mean sea surface provided direct evidence that wind stress was affected by swell waves. To interpret such phenomena, an improved approach was derived based on the fact that the total wind stress was the vector sum of turbulent stress and wave-coherent stress. Different from the approaches of earlier studies, our approach did not align the turbulent stress with the mean wind speed. The influence of swell waves on the magnitude and direction of the total wind stress was analyzed using our approach. The results showed that the wave-coherent stress derived from our data accounted for 32% of the total wind stress. The magnitude and angle of the wind stress changed by swell waves depended on the relative angle between the turbulent stress and swell direction.
Source:

Journal of Geophysical Research: Oceans, 124(8), 5671-5685.
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https://doi.org/10.1029/2019jc015153
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urn:sha256:b70aaa4a3a09d639f4437df722c616dedf419bfc10aac0cece0854bba6061850
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Effects of Swell Waves on Atmospheric Boundary Layer Turbulence: A Low Wind Field Study

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