Daily to Seasonal Variability of the Mixed Layer Depth in the Central Yellow Sea: Effects of Atmospheric Forcing SCIE SCOPUS

Cited 2 time in WEB OF SCIENCE Cited 3 time in Scopus
Title
Daily to Seasonal Variability of the Mixed Layer Depth in the Central Yellow Sea: Effects of Atmospheric Forcing
Author(s)
Kim, Yong Sun; Jang, Chan Joo; Jeong, Jin-Yong; Shim, Jae-Seol
KIOST Author(s)
Kim, Yong Sun(김용선)Jang, Chan Joo(장찬주)Jeong, Jin Yong(정진용)
Publication Year
2018-05
Abstract
Daily to seasonal variability of the mixed layer depth (MLD) was investigated based on the CTD mooring time series during the April to October 2015 period, taken from the Ongjin Socheongcho Ocean Research Station in the central Yellow Sea. The time evolution of the seasonal MLD was characterized by three distinct phases: fully-mixed (deep) phase by late April, quasi-stable (shallow) phase from late April to late July, and gradual deepening phase thereafter. During the first phase, the entire water column was occupied by cold bottom waters, which seemed to impede the change of the MLD according to atmospheric forcing. Besides this fully-mixed phase, daily MLD fluctuations varied coherently with the surface wind speed with a lag of several hours on the time scale of few days. During the deepening phase, the MLD increased monotonically at a rate of 2.6 m per month, corresponding to gradually increased net heat losses to the atmosphere at a rate of 2.7 W/m(2) per day, suggesting the role of net heat flux in determining the seasonal variance of the MLD. The relationships of both the winds and net heat fluxes with the MLDs weakened to an insignificant level from late July to middle August. During this period, heavy rainfall associated with both typhoon and tropical depressions, and the attendant riverine runoff probably added buoyancy forcing, forming a barrier layer near the MLD base. Our results collectively suggest that atmospheric forcing plays a critical role in determining the variability of the MLD in the central Yellow Sea, where three-dimensional oceanic processes including tides and currents are relatively weak.
ISSN
0749-0208
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/961
DOI
10.2112/SI85-116.1
Bibliographic Citation
JOURNAL OF COASTAL RESEARCH, pp.576 - 580, 2018
Publisher
COASTAL EDUCATION & RESEARCH FOUNDATION
Keywords
Ocean research station; Socheongcho; Heat flux; Wind stress; Typhoon
Type
Article
Language
English
Document Type
Article; Proceedings Paper
Publisher
COASTAL EDUCATION & RESEARCH FOUNDATION
Related Researcher
Research Interests

Variablility of ocean physical environment,해양물리환경변동

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