气候变化领域集成服务门户(CCPortal): Toward Operational Wave-Current Interactions Over the Agulhas Current System

CCPortal

DOI	10.1029/2020JC016321
	Toward Operational Wave-Current Interactions Over the Agulhas Current System
	Barnes M.A.; Rautenbach C.
发表日期	2020
ISSN	21699275
卷号	125 期号:7
英文摘要	A computationally inexpensive operational wave forecasting system taking wave-current interactions over the fast-flowing Agulhas Current into account is explored. Spectral wave model hindcasts at 1/16 of a geographical degree are employed using the Simulating Waves in the Nearshore (SWAN) wave model. Unidirectional wave-current coupling, with currents affecting waves, is performed using both Operational Mercator 1/12 degree (ORCA12) and GLOBCURRENT 1/4 degree currents. Comparisons between the coupled and uncoupled simulations indicate that wave amplification or lowering is highly dependent on the current magnitude and wave incident angle. In opposing current scenarios, the significant wave height can increase by 20–40% and by 60% in extreme cases. Model validation is performed using Jason-3 satellite altimetry measurements and in situ directional wave buoy measurements. The nearshore wave directional dispersion is found to be significantly influenced by the core of the Agulhas Current. This is especially prominent in current-following cases with wave-current direction differences of up to 20°. The findings are all corroborated by simplistic, idealized models. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Agulhas Current; South Africa; SWAN; wave refraction; wave steepening; wave-current interactions
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186778
作者单位	Marine Research Unit, South African Weather Service, Cape Town, South Africa; Department of Geography, Geoinformatics and Meteorology, University of Pretoria, Pretoria, South Africa; Department of Oceanography and Marine Research Institute, University of Cape Town, Cape Town, South Africa; Institute for Coastal and Marine Research, Nelson Mandela University, Port Elizabeth, South Africa; Research and Development, MetOcean Solutions, Raglan, New Zealand
推荐引用方式 GB/T 7714	Barnes M.A.,Rautenbach C.. Toward Operational Wave-Current Interactions Over the Agulhas Current System[J],2020,125(7).
APA	Barnes M.A.,&Rautenbach C..(2020).Toward Operational Wave-Current Interactions Over the Agulhas Current System.Journal of Geophysical Research: Oceans,125(7).
MLA	Barnes M.A.,et al."Toward Operational Wave-Current Interactions Over the Agulhas Current System".Journal of Geophysical Research: Oceans 125.7(2020).