DOI: 10.1029/2017JC013618
Scopus记录号: 2-s2.0-85046037514
论文题名: Variation of Residual Current in the Seto Inland Sea Driven by Sea Level Difference Between the Bungo and Kii Channels
作者: Taniguchi N. ; Huang C.-F. ; Arai M. ; Howe B.M.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 4 起始页码: 2921
结束页码: 2933
语种: 英语
英文关键词: coastal acoustic tomography
; linear regression
; residual current
; sea level difference
; Seto Inland Sea
; volume transport
Scopus关键词: oceanic current
; pressure gradient
; regression analysis
; sea level change
; tomography
; volume transport
; Bungo Channel
; Japan
; Kii Channel
; Seto Inland Sea
英文摘要: Understanding residual (i.e., total minus tidal) currents in coastal seas is important because the residual currents affect long-term material transports. In the Seto Inland Sea, Japan (SIS), a Bungo Channel to Kii Channel sea level difference causes a horizontal pressure gradient in the SIS and thus affects the residual current in the SIS. This study applies a linear regression method to examine how the residual current responds to the Bungo-Kii sea level difference. The residual current is obtained using the reciprocal acoustic transmission data collected in the eastern portion of the Aki-Nada sea area in 2012. The residual currents are estimated in the following three periods: from 12 April to 9 June, from 15 June to 21 July, and from 20 September to 27 October. In the regression analysis, an additional term is included to account for the fortnightly variation of the tide-induced residual current. More than 75% of the observed residual currents can be explained by the sea level difference and the fortnightly variation. For the three periods, the variations of the residual current along the acoustic transmission line are, respectively, 0.20 ± 0.01, 0.22 ± 0.01, and 0.30 ± 0.01 cm s−1 per 1 cm of the Bungo-Kii sea level difference. The corresponding variations in the volume transport are 920 ± 149, 1, 040±170, and 1, 390±223 m3 s−1 per 1 cm sea level difference. Comparing with the wind-induced volume transport, we find that the sea level difference can cause a comparable volume transport variation. © 2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114186
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Institute of Oceanography, National Taiwan University, Taipei, Taiwan; Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima, Japan; Department of Ocean and Resources Engineering, University of Hawaii at Manoa, Honolulu, HI, United States
Recommended Citation:
Taniguchi N.,Huang C.-F.,Arai M.,et al. Variation of Residual Current in the Seto Inland Sea Driven by Sea Level Difference Between the Bungo and Kii Channels[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(4)