气候变化领域集成服务门户(CCPortal): Study of internal wave characteristics off northwest Bay of Bengal using synthetic aperture radar

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DOI	10.1007/s11069-020-04280-6
	Study of internal wave characteristics off northwest Bay of Bengal using synthetic aperture radar
	Phaniharam S.A.; Chintam V.; Baggu G.; Koneru V.S.R.P.
发表日期	2020
ISSN	0921030X
起始页码	2451
结束页码	2460
卷号	104 期号:3
英文摘要	Internal solitary waves (IWs) in the northwest Bay of Bengal were studied using ENVISAT ASAR imageries. Simultaneous in situ observations were also carried out to study the characteristics of the internal waves. Internal wave features have often been observed over the ocean area between 18.5°–19.5° N and 84.5°–85.5° E. The direction of propagation of IWs is generally toward the coast with wavelengths ranging from 0.4 to 1.1 km. The phase speeds of the IWs vary from 0.12 to 1.3 m/s. Internal wave amplitudes computed using Korteweg and de Vries model show good agreement with in situ data. Based on their direction of propagation and time series analysis, IWs generated were found to be of tidal forcing origin over local topographic features. IWs of different types like wave packets or wave trains and single solitons of weak manifestations were observed depending on the phase and the tidal amplitude as well as the stratification of the ocean, which in turn vary due to the dynamic and complex nature of Bay of Bengal, as it experiences strong monsoon winds and low pressure systems with calm weather in between them. The internal waves are often observed during non-monsoon period over this region. During monsoon period, continuous vertical mixing takes place due to strong winds causing unfavorable conditions for IW formation and so the observation of IWs during monsoons is rather rare. © 2020, Springer Nature B.V.
关键词	Internal solitary waves Monsoon Stratification Tidal amplitude Vertical mixing
英文关键词	amplitude; Envisat; internal wave; low pressure system; monsoon; nearshore dynamics; satellite imagery; solitary wave; stratification; synthetic aperture radar; topographic effect; vertical mixing; wave field; wave propagation; wind wave; Bay of Bengal; Indian Ocean
语种	英语
来源期刊	Natural Hazards
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/205877
作者单位	Department of Meteorology and Oceanography, Andhra University, Visakhapatnam, Andhra Pradesh 530003, India
推荐引用方式 GB/T 7714	Phaniharam S.A.,Chintam V.,Baggu G.,et al. Study of internal wave characteristics off northwest Bay of Bengal using synthetic aperture radar[J],2020,104(3).
APA	Phaniharam S.A.,Chintam V.,Baggu G.,&Koneru V.S.R.P..(2020).Study of internal wave characteristics off northwest Bay of Bengal using synthetic aperture radar.Natural Hazards,104(3).
MLA	Phaniharam S.A.,et al."Study of internal wave characteristics off northwest Bay of Bengal using synthetic aperture radar".Natural Hazards 104.3(2020).