DOI: 10.1007/s11069-020-04280-6
论文题名: Study of internal wave characteristics off northwest Bay of Bengal using synthetic aperture radar
作者: Phaniharam S.A. ; Chintam V. ; Baggu G. ; Koneru V.S.R.P.
刊名: Natural Hazards
ISSN: 0921030X
出版年: 2020
卷: 104, 期: 3 起始页码: 2451
结束页码: 2460
语种: 英语
中文关键词: 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
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/168676
Appears in Collections: 气候变化与战略
There are no files associated with this item.
作者单位: Department of Meteorology and Oceanography, Andhra University, Visakhapatnam, Andhra Pradesh 530003, India
Recommended Citation:
Phaniharam S.A.,Chintam V.,Baggu G.,et al. Study of internal wave characteristics off northwest Bay of Bengal using synthetic aperture radar[J]. Natural Hazards,2020-01-01,104(3)