NDLI: Observation of the bottom boundary layer off the Soya Warm Current

Content Provider	Springer Nature Link
Author	Ishizu, Miho Kitade, Yujiro
Copyright Year	2009
Abstract	A mooring observation of current velocity, temperature and bottom pressure was carried out approximately 30 km off the coast of Monbetsu, between August 7 and September 2, 2005, to investigate the characteristics of bottom boundary layer (BBL) off the Soya Warm Current (SWC). We succeeded in measuring the Ekman veering and bottom Ekman transport in the BBL. On comparing the observed current velocity with that represented by the classical theoretical equation, the observed alongshore current velocity in BBL disagreed with that represented by the classical theoretical equation, but the cross-shore one agreed well. However after applying a linear extrapolation for the alongshore current velocity to estimate the alongshore geostrophic current velocity above the bottom, we could explain the alongshore current velocity by that represented in the classical theoretical equation. Consequently, our observations strongly support one of the proposed formation mechanisms of the cold-water belt observed off the SWC, that is, the convergence of bottom Ekman transport. The volume transport of vertical pumping velocity was estimated to be (0.12–0.25) Sv. In addition, the vertical profile of average temperature in all observation periods shows that slightly warmer water lies beneath the homogenous temperature layer, in the BBL. The result is considered to imply that the down-slope advection due to bottom Ekman transport supplies the SWC water in BBL and the eddy diffusivity of order of 10$^{−3}$ m$^{2}$s$^{−1}$ maintains the oceanic structure in the bottom mixed layer.
Starting Page	639
Ending Page	645
Page Count	7
File Format	PDF
ISSN	09168370
Journal	Journal of Oceanography
Volume Number	65
Issue Number	5
e-ISSN	1573868X
Language	English
Publisher	Springer Netherlands
Publisher Date	2009-11-15
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Bottom boundary layer bottom Ekman transport cold-water belt Soya Warm Current upwelling Freshwater & Marine Ecology Oceanography
Content Type	Text
Resource Type	Article
Subject	Oceanography

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Formation mechanism of the cold-water belt formed off the soya warm current

Volume transport of the Soya Warm Current revealed by bottom-mounted ADCP and ocean-radar measurement

Favorable conditions for cold-water intrusion from the Kuroshio intermediate layer into Osaka Bay

Volume transport in the Soya Strait during 2006–2008

Subinertial and seasonal variations in the Soya Warm Current revealed by HF ocean radars, coastal tide gauges, and bottom-mounted ADCP

Upwelling age: an indicator of local tendency for coastal upwelling

Winter coastal upwelling off northwest Borneo in the South China Sea

Intrusion of Kuroshio-Derived bottom cold water into Osaka Bay and its possible cause

Volume transport of the Tsushima Warm Current, west of Tsugaru Strait bifurcation area

Observation of the bottom boundary layer off the Soya Warm Current

Similar Documents

Formation mechanism of the cold-water belt formed off the soya warm current

Volume transport of the Soya Warm Current revealed by bottom-mounted ADCP and ocean-radar measurement

Favorable conditions for cold-water intrusion from the Kuroshio intermediate layer into Osaka Bay

Volume transport in the Soya Strait during 2006–2008

Subinertial and seasonal variations in the Soya Warm Current revealed by HF ocean radars, coastal tide gauges, and bottom-mounted ADCP

Upwelling age: an indicator of local tendency for coastal upwelling

Winter coastal upwelling off northwest Borneo in the South China Sea

Intrusion of Kuroshio-Derived bottom cold water into Osaka Bay and its possible cause

Volume transport of the Tsushima Warm Current, west of Tsugaru Strait bifurcation area

Observation of the bottom boundary layer off the Soya Warm Current