气候变化领域集成服务门户(CCPortal): An ocean wind-wave climatology for the Southern Brazilian Shelf. Part II: Variability in space and time

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DOI	10.1016/j.dynatmoce.2019.101103
	An ocean wind-wave climatology for the Southern Brazilian Shelf. Part II: Variability in space and time
	Cecilio R.O.; Dillenburg S.R.
发表日期	2019
ISSN	03770265
卷号	88
英文摘要	Previously validated model results were used to characterize the wave climate over the Southern Brazilian Shelf (SBS). The low mean significant wave height over the western South Atlantic shelves was shown together with examples of cyclone-induced extreme wave fields and other typical wave conditions. The mean offshore spectra showed a bimodal shape with a predominance of S/SSW and ENE/E waves with distinctive interannual rising periods in wave energy density. Along-shelf wave energy gradients were seen near the coast with higher energy located off capes and coastal projections and energy minima between them. A considerable drop in wave energy suggests the 40 m depth as the mean wave base and consequently the lower limit of the SBS shoreface. The upper shoreface mean wave energy density varied abruptly along the shelf in response to differences in bottom declivities. The large and shallow shoreface was responsible for an intense refraction of the waves and hence very small angles of attack. Additionally, it was shown the sheltering effect caused by capes and coastal projections and a remarkable north/south energy asymmetry between them, caused by a windowing on the wave propagation to the shore. Altogether, it was possible to state that bottom friction plays a major role in wave differentiation along the SBS shoreface, thus suggesting that shelf morphology might indeed be more important to generate wave variability than the offshore wave variation itself. © 2019 Elsevier B.V.
英文关键词	Shoreface; SWAN; Wave base; Wave gradients; Wave modelling; Wave refraction; WW3
语种	英语
scopus关键词	Angle of attack; Climate models; Offshore oil well production; Refraction; Storms; Wave energy conversion; Wave propagation; Ocean wind waves; Sheltering effect; Shoreface; Significant wave height; SWAN; Wave energy density; Wave modelling; Wave refraction; Ocean currents; air-sea interaction; climatology; ocean wave; spatiotemporal analysis; wave energy; wave modeling; wind-wave interaction; Atlantic Ocean; Brazilian Shelf
来源期刊	Dynamics of Atmospheres and Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178346
作者单位	Programa de Pós-graduação em Geociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil; Centro de Estudos de Geologia Costeira e Oceânica, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
推荐引用方式 GB/T 7714	Cecilio R.O.,Dillenburg S.R.. An ocean wind-wave climatology for the Southern Brazilian Shelf. Part II: Variability in space and time[J],2019,88.
APA	Cecilio R.O.,&Dillenburg S.R..(2019).An ocean wind-wave climatology for the Southern Brazilian Shelf. Part II: Variability in space and time.Dynamics of Atmospheres and Oceans,88.
MLA	Cecilio R.O.,et al."An ocean wind-wave climatology for the Southern Brazilian Shelf. Part II: Variability in space and time".Dynamics of Atmospheres and Oceans 88(2019).