Simulation of eddy-driven deep circulation in the East/Japan Sea by using a three-layer model with wind, throughflow and deep water formation forcings SCIE SCOPUS

Cited 3 time in WEB OF SCIENCE Cited 3 time in Scopus
Title
Simulation of eddy-driven deep circulation in the East/Japan Sea by using a three-layer model with wind, throughflow and deep water formation forcings
Author(s)
Park, Yumi; Shin, Hong-Ryeol; Yoon, Jong-Hwan; Kim, Cheol-Ho; Yoshikawa, Yutaka
Publication Year
2015-10
Abstract
A three-layer model was used to investigate the impact of grid resolution, bottom topography, wind, throughflow (the Tsushima Warm Current) and deep water formation (DWF) forcing on deep circulation in the East/japan Sea. High grid resolution (1/36 degrees) and real bottom topography are essential to capture the observed features of surface and deep circulation. An increase of grid resolution from 1/12 degrees to 1/36 degrees, wind and DWF forcing dramatically increase the current velocity and eddy kinetic energy (EKE) of the lower-layer. Of the three forcings, the influence of wind forcing is the most powerful on the abyssal circulation, followed by the order of the throughflow and DWF forcing, respectively. DWF forcing does not largely change the horizontal circulation pattern of the lower-layer in the 1/36 degrees resolution model, but it increases the current velocity by 33.9%. Model results indicate that surface EKE is larger in the southern region than in the northern region of the East/japan Sea, while deep EKE is larger in the northern area. These results are in good agreement with EKE distributions obtained from the surface drifter and the ARGO float trajectories. The EKE maxima of the lower-layer is geographically concentrated on the bottom slope, indicating that the strong circulation in the lower-layer is due to the strong eddy activity on the slope. The flux calculation shows that the primary eddy fluxes of potential vorticity-driving deep circulation are layer thickness flux (LAY) and relative vorticity flux (REL). (C) 2015 Elsevier B.V. All rights reserved.
ISSN
0924-7963
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/2403
DOI
10.1016/j.jmarsys.2015.05.006
Bibliographic Citation
JOURNAL OF MARINE SYSTEMS, v.150, pp.41 - 55, 2015
Publisher
ELSEVIER SCIENCE BV
Subject
TSUSHIMA WARM CURRENT; JAPAN/EAST SEA; EAST SEA; ABYSSAL CIRCULATION; WORLD OCEAN; MEAN FLOW; VARIABILITY; FLUX; CONVECTION; DYNAMICS
Keywords
The East/Japan Sea; Three-layer model; Deep circulation of the East/Japan Sea; Deep water formation; Eddy kinetic energy; Eddy-driven circulation
Type
Article
Language
English
Document Type
Article
Publisher
ELSEVIER SCIENCE BV
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