Vertical mixing in the bottom mixed layer near the continental shelf break in the East China Sea

Takeshi Matsuno, Seiichi Kanari, Chikashi Kobayashi, Toshiyuki Hibiya

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The strength of the vertical mixing in the bottom mixed layer near the continental shelf break in the East China Sea was directly measured with the Micro-Scale Profiler (MSP). It has been shown that there is no significant statistical relation between the turbulent energy dissipation ε and the degree of the stratification N2. It seems that the vigorous turbulence occurs not constantly but intermittently in the bottom mixed layer so that a large variation of ε is found depending on the time. In contrast to ε, the coefficient of the vertical eddy diffusivity Kz is mostly determined by N such that Kz is large in the bottom mixed layer and small in the thermocline. Large value of Kz in the bottom mixed layer is also found in the time series of Kz estimated in terms of Richardson number calculated from the data obtained with electromagnetic current meters. The value of Kz more than 10 cm2s-1 frequently occur in the layer of 20-25 m thick just above the bottom.

Original languageEnglish
Pages (from-to)437-448
Number of pages12
JournalJournal of Oceanography
Volume50
Issue number4
DOIs
Publication statusPublished - Jul 1 1994

Fingerprint

vertical mixing
shelf break
mixed layer
continental shelf
Richardson number
profiler
energy dissipation
thermocline
diffusivity
eddy
stratification
turbulence
time series
sea

All Science Journal Classification (ASJC) codes

  • Oceanography

Cite this

Vertical mixing in the bottom mixed layer near the continental shelf break in the East China Sea. / Matsuno, Takeshi; Kanari, Seiichi; Kobayashi, Chikashi; Hibiya, Toshiyuki.

In: Journal of Oceanography, Vol. 50, No. 4, 01.07.1994, p. 437-448.

Research output: Contribution to journalArticle

Matsuno, Takeshi ; Kanari, Seiichi ; Kobayashi, Chikashi ; Hibiya, Toshiyuki. / Vertical mixing in the bottom mixed layer near the continental shelf break in the East China Sea. In: Journal of Oceanography. 1994 ; Vol. 50, No. 4. pp. 437-448.
@article{ce7b44b4745a4d4dbaf7245d952803ee,
title = "Vertical mixing in the bottom mixed layer near the continental shelf break in the East China Sea",
abstract = "The strength of the vertical mixing in the bottom mixed layer near the continental shelf break in the East China Sea was directly measured with the Micro-Scale Profiler (MSP). It has been shown that there is no significant statistical relation between the turbulent energy dissipation ε and the degree of the stratification N2. It seems that the vigorous turbulence occurs not constantly but intermittently in the bottom mixed layer so that a large variation of ε is found depending on the time. In contrast to ε, the coefficient of the vertical eddy diffusivity Kz is mostly determined by N such that Kz is large in the bottom mixed layer and small in the thermocline. Large value of Kz in the bottom mixed layer is also found in the time series of Kz estimated in terms of Richardson number calculated from the data obtained with electromagnetic current meters. The value of Kz more than 10 cm2s-1 frequently occur in the layer of 20-25 m thick just above the bottom.",
author = "Takeshi Matsuno and Seiichi Kanari and Chikashi Kobayashi and Toshiyuki Hibiya",
year = "1994",
month = "7",
day = "1",
doi = "10.1007/BF02234966",
language = "English",
volume = "50",
pages = "437--448",
journal = "Journal of Oceanography",
issn = "0916-8370",
publisher = "Oceanographic Society of Japan",
number = "4",

}

TY - JOUR

T1 - Vertical mixing in the bottom mixed layer near the continental shelf break in the East China Sea

AU - Matsuno, Takeshi

AU - Kanari, Seiichi

AU - Kobayashi, Chikashi

AU - Hibiya, Toshiyuki

PY - 1994/7/1

Y1 - 1994/7/1

N2 - The strength of the vertical mixing in the bottom mixed layer near the continental shelf break in the East China Sea was directly measured with the Micro-Scale Profiler (MSP). It has been shown that there is no significant statistical relation between the turbulent energy dissipation ε and the degree of the stratification N2. It seems that the vigorous turbulence occurs not constantly but intermittently in the bottom mixed layer so that a large variation of ε is found depending on the time. In contrast to ε, the coefficient of the vertical eddy diffusivity Kz is mostly determined by N such that Kz is large in the bottom mixed layer and small in the thermocline. Large value of Kz in the bottom mixed layer is also found in the time series of Kz estimated in terms of Richardson number calculated from the data obtained with electromagnetic current meters. The value of Kz more than 10 cm2s-1 frequently occur in the layer of 20-25 m thick just above the bottom.

AB - The strength of the vertical mixing in the bottom mixed layer near the continental shelf break in the East China Sea was directly measured with the Micro-Scale Profiler (MSP). It has been shown that there is no significant statistical relation between the turbulent energy dissipation ε and the degree of the stratification N2. It seems that the vigorous turbulence occurs not constantly but intermittently in the bottom mixed layer so that a large variation of ε is found depending on the time. In contrast to ε, the coefficient of the vertical eddy diffusivity Kz is mostly determined by N such that Kz is large in the bottom mixed layer and small in the thermocline. Large value of Kz in the bottom mixed layer is also found in the time series of Kz estimated in terms of Richardson number calculated from the data obtained with electromagnetic current meters. The value of Kz more than 10 cm2s-1 frequently occur in the layer of 20-25 m thick just above the bottom.

UR - http://www.scopus.com/inward/record.url?scp=0028594988&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0028594988&partnerID=8YFLogxK

U2 - 10.1007/BF02234966

DO - 10.1007/BF02234966

M3 - Article

AN - SCOPUS:0028594988

VL - 50

SP - 437

EP - 448

JO - Journal of Oceanography

JF - Journal of Oceanography

SN - 0916-8370

IS - 4

ER -