气候变化领域集成服务门户(CCPortal): Characterization of the air-sea exchange mechanisms during a Mediterranean heavy precipitation event using realistic sea state modelling

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DOI	10.5194/acp-20-1675-2020
	Characterization of the air-sea exchange mechanisms during a Mediterranean heavy precipitation event using realistic sea state modelling
	Sauvage C.; Lebeaupin Brossier C.; Bouin M.-N.; Ducrocq V.
发表日期	2020
ISSN	16807316
起始页码	1675
结束页码	1699
卷号	20 期号:3
英文摘要	This study investigates the mechanisms acting at the air-sea interface during a heavy precipitation event that occurred between 12 and 14 October 2016 over the northwestern Mediterranean area and led to large amounts of rainfall (up to 300 mm in 24 h) over the Hérault region (southern France). The study case was characterized by a very strong (> 20 m s-1) easterly to south-easterly wind at low level that generated very rough seas (significant wave height of up to 6 m) along the French Riviera and the Gulf of Lion. In order to investigate the role of the waves on air-sea exchanges during such extreme events, a set of numerical experiments was designed using the Météo-France kilometre-scale AROMEFrance numerical weather prediction model-including the WASP (Wave-Age-dependant Stress Parametrization) sea surface turbulent flux parametrization-and the WaveWatch III wave model. Results from these sensitivity experiments in the forced or coupled modes showed that taking the waves generated by the model into account increases the surface roughness. Thus, the increase in the momentum flux induces a slowdown of the easterly low-level atmospheric flow and a displacement of the convergence line at sea. Despite strong winds and a young sea below the easterly flow, the turbulent heat fluxes upstream of the precipitating system are not significantly modified. The forecast of the heaviest precipitation is finally modified when the sea state is taken into account; notably, in terms of location, this modification is slightly larger in the forced mode than in the coupled mode, as the coupling interactively balances the wind sea, the stress and the wind. © 2020 Author(s).
关键词	air-sea interaction climate modeling easterly wave extreme event precipitation (climatology)rainfall sea state wind Cote d'Azur France Gulf of Lion Herault Mediterranean Coast [France]Mediterranean Sea Occitanie Provence-Alpes-Cote d'Azur
语种	英语
来源机构	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132241
推荐引用方式 GB/T 7714	Sauvage C.,Lebeaupin Brossier C.,Bouin M.-N.,et al. Characterization of the air-sea exchange mechanisms during a Mediterranean heavy precipitation event using realistic sea state modelling[J]. Atmospheric Chemistry and Physics,2020,20(3).
APA	Sauvage C.,Lebeaupin Brossier C.,Bouin M.-N.,&Ducrocq V..(2020).Characterization of the air-sea exchange mechanisms during a Mediterranean heavy precipitation event using realistic sea state modelling.,20(3).
MLA	Sauvage C.,et al."Characterization of the air-sea exchange mechanisms during a Mediterranean heavy precipitation event using realistic sea state modelling".20.3(2020).