气候变化领域集成服务门户(CCPortal): Impact of tropical and extra tropical climate variability on Indian Ocean surface waves

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DOI	10.1007/s00382-020-05262-x
	Impact of tropical and extra tropical climate variability on Indian Ocean surface waves
	Remya P.G.; Kumar B.P.; Srinivas G.; Nair T.M.B.
发表日期	2020
ISSN	0930-7575
起始页码	4919
结束页码	4933
卷号	54
英文摘要	Understanding the impact of various climate features on wave climate is important for effective coastal climate adaptation and mitigation strategy planning. In the present study, the effect of tropical and extra-tropical climate modes such as Indian Ocean Dipole (IOD), El Niño Southern Oscillation (ENSO) and Southern Annular Mode (SAM) on wind-wave climate of the Indian Ocean (IO) is studied using multiple linear regression of individual climate indices on relevant wind-wave parameters. There are two regions of importance for swell generation in the Indian Ocean - a region between 40° and 60° S in the Southern Ocean (SO) and another region in the Eastern Tropical Indian Ocean (ETIO; 10°–30° S, 60°–100 °E). SAM, the strongest inter-annual mode of the SO, generates swells in the 40°–60°S band throughout the year that eventually propagates to the entire North IO. Both the positive and negative phases of SAM generate swells from SO, but it’s genesis region vary meridionally depending on the phase of SAM. The positive phase of ENSO (LaNiña) generally reduce the westerly wind anomalies in the SO caused by a positive phase of SAM and hence reduce the swell generation from SO, but causes stronger south-easterlies in the ETIO, generating more swells from there. IOD that peaks in September–October–November period has its effect on swell generation limited to eastern equatorial IO. Our analysis suggests that interannual climate features are important in modulating wind-wave climate of IO and a basin-wide model set-up with an accurate representation of various interannual climate features is a prerequisite for accurate wave forecast. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	ENSO; Indian Ocean; IOD; Multiple linear regression; SAM; Wave climate
语种	英语
scopus关键词	air-sea interaction; annual variation; climate variation; El Nino-Southern Oscillation; extratropical environment; multiple regression; ocean wave; surface wave; tropical region; wave field; Indian Ocean; Indian Ocean (Tropical); Southern Ocean
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145437
作者单位	Indian National Centre for Ocean Information Services (INCOIS), Ministry of Earth Sciences (MoES)-Govt. of India, Pragathi Nagar, Hyderabad, 500090, India
推荐引用方式 GB/T 7714	Remya P.G.,Kumar B.P.,Srinivas G.,et al. Impact of tropical and extra tropical climate variability on Indian Ocean surface waves[J],2020,54.
APA	Remya P.G.,Kumar B.P.,Srinivas G.,&Nair T.M.B..(2020).Impact of tropical and extra tropical climate variability on Indian Ocean surface waves.Climate Dynamics,54.
MLA	Remya P.G.,et al."Impact of tropical and extra tropical climate variability on Indian Ocean surface waves".Climate Dynamics 54(2020).