Probability Distribution of Turbulent Kinetic Energy Dissipation Rate in Ocean: Observations and Approximations SCIE SCOPUS

Cited 6 time in WEB OF SCIENCE Cited 6 time in Scopus
Title
Probability Distribution of Turbulent Kinetic Energy Dissipation Rate in Ocean: Observations and Approximations
Author(s)
Lozovatsky, I.; Fernando, H. J. S.; Planella-Morato, J.; Liu, Zhiyu; Lee, J. -H.; Jinadasa, S. U. P.
KIOST Author(s)
Lee, Jae Hak(이재학)
Publication Year
2017-10
Abstract
The probability distribution of turbulent kinetic energy dissipation rate in stratified ocean usually deviates from the classic lognormal distribution that has been formulated for and often observed in unstratified homogeneous layers of atmospheric and oceanic turbulence. Our measurements of vertical profiles of micro- scale shear, collected in the East China Sea, northern Bay of Bengal, to the south and east of Sri Lanka, and in the Gulf Stream region, show that the probability distributions of the dissipation rate (epsilon) over barr in the pycnoclines ( r similar to 1.4 m is the averaging scale) can be successfully modeled by the Burr ( type XII) probability distribution. In weakly stratified boundary layers, lognormal distribution of (epsilon) over barr is preferable, although the Burr is an acceptable alternative. The skewness SkE and the kurtosis KE of the dissipation rate appear to be well correlated in a wide range of SkE and KE variability. Plain Language Summary The probability distribution of turbulent kinetic energy dissipation rate in stratified ocean usually deviates from the classic lognormal distribution that has been formulated for and often observed in homogeneous layers of atmospheric and oceanic turbulence. Our microstructure measurements, collected in the East China Sea, northern Bay of Bengal, to the south and east of Sri Lanka, and in the Gulf Stream region, show that the probability distributions of the dissipation rate in stably stratified layers can be successfully modeled by the Burr ( type XII) probability distribution. In weakly stratified boundary layers, lognormal distribution of the dissipation is preferable, although the Burr is an acceptable alternative.
ISSN
2169-9275
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/1147
DOI
10.1002/2017JC013076
Bibliographic Citation
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, v.122, no.10, pp.8293 - 8308, 2017
Publisher
AMER GEOPHYSICAL UNION
Subject
MICROSTRUCTURE MEASUREMENTS; VELOCITY DERIVATIVES; REYNOLDS-NUMBER; INTERNAL WAVES; BOUNDARY-LAYER; SURFACE-LAYER; SKEWNESS; INTERMITTENCY; WATERS; MOMENTS
Keywords
turbulence; dissipation rate; pycnocline; mixed layer; Burr and lognormal probability distributions; skewness and kurtosis
Type
Article
Language
English
Document Type
Article
Publisher
AMER GEOPHYSICAL UNION
Related Researcher
Files in This Item:
There are no files associated with this item.

qrcode

Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse