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Open AccessArticle

Skill Assessment of an Atmosphere–Wave Regional Coupled Model over the East China Sea with a Focus on Typhoons

1
CAS Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
2
Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
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Pilot National Laboratory for Marine Science and Technology, Qingdao 266237, China
4
Institute of Coastal Research, Helmholtz Zentrum Geesthacht, Geesthacht 21502, Germany
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College of Marine and Environmental Sciences, Tianjin University of Science and Technology, Tianjin 300457, China
6
College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100864, China
*
Author to whom correspondence should be addressed.
Atmosphere 2020, 11(3), 252; https://doi.org/10.3390/atmos11030252
Received: 22 January 2020 / Revised: 28 February 2020 / Accepted: 1 March 2020 / Published: 3 March 2020
(This article belongs to the Special Issue Waves and Wave Climate Analysis and Modeling)
This study performed several sensitivity experiments to investigate the impact of atmosphere–wave coupling on the simulated wind and waves over the East China Sea (ECS) with a focus on typhoon events. These experiments include stand-alone regional atmosphere model (CCLM) simulations, stand-alone spectral wave model (WAM) simulations driven by the regional atmospheric model CCLM or ERA5 reanalysis, and two-way (CCLM-WAM) coupled simulations. We assessed the simulated wind speed and significant wave height against in situ observations and remote sensing data and focused on typhoon events in 2010. We analyzed the differences between the experiments in capturing the surface pressure, wind speed, and roughness length. Both ERA5 reanalysis data and our regional model simulations demonstrate high quality in capturing wind and wave conditions over the ECS. The results show that downscaled simulations tend to be closer to in situ observations than ERA5 reanalysis data in capturing wind variability and probability distribution, dominant wind and wave directions, strong typhoon intensity and related extreme significant wave height. In comparison with satellite observations, the CCLM-WAM simulation outperforms the CCLM in reducing wind bias. The coupled and uncoupled simulations are very similar in terms of other wind and wave statistics. Though there is much improvement in capturing typhoon intensity to ERA5, regional downscaled simulations still underestimate the wind intensity of tropical cyclones. View Full-Text
Keywords: atmosphere–wave coupled model; East China Sea; wind; wave; tropical cyclones atmosphere–wave coupled model; East China Sea; wind; wave; tropical cyclones
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Li, D.; Staneva, J.; Grayek, S.; Behrens, A.; Feng, J.; Yin, B. Skill Assessment of an Atmosphere–Wave Regional Coupled Model over the East China Sea with a Focus on Typhoons. Atmosphere 2020, 11, 252.

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