Influence of Coriolis Parameter Variation on Langmuir Turbulence in the Ocean Upper Mixed Layer with Large Eddy Simulation

Dongxiao Wang; Guojing Li; Lian Shen; Yeqiang Shu

doi:10.1007/s00376-021-1390-6

Influence of Coriolis Parameter Variation on Langmuir Turbulence in the Ocean Upper Mixed Layer with Large Eddy Simulation

Dongxiao Wang, Guojing Li, Lian Shen, Yeqiang Shu

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Langmuir turbulence is a complex turbulent process in the ocean upper mixed layer. The Coriolis parameter has an important effect on Langmuir turbulence through the Coriolis-Stokes force and Ekman effect, however, this effect on Langmuir turbulence has not been systematically investigated. Here, the impact of the Coriolis parameter on Langmuir turbulence with a change of latitude (LAT) from 20°N to 80°N is studied using a non-hydrostatic large eddy simulation model under an ideal condition. The results show that the ratio of the upper mixed layer depth to Ekman depth scale (RME) RME = 0.266 (LAT = 50°N) is a key value (latitude) for the modulation effect of the Coriolis parameter on the mean and turbulent statistics of Langmuir turbulence. It is found that the rate of change of the sea surface temperature, upper mixed layer depth, entrainment flux, crosswind velocity, downwind vertical momentum flux, and turbulent kinetic energy budget terms associated with Langmuir turbulence are more evident at RME ⩽ 0.266 (LAT ⩽ 50°N) than at RME ⩾ 0.266 (LAT ⩾ 50°N). However, the rate of change of the depth-averaged crosswind vertical momentum flux does not have a clear variation between RME ⩽ 0.266 and RME ⩾ 0.266. The complex changes of both Langmuir turbulence characteristics and influence of Langmuir turbulence on the upper mixed layer with latitude presented here may provide more information for further improving Langmuir turbulence parameterization.

Original language	English (US)
Pages (from-to)	1487-1500
Number of pages	14
Journal	Advances in Atmospheric Sciences
Volume	39
Issue number	9
DOIs	https://doi.org/10.1007/s00376-021-1390-6
State	Published - Sep 2022
Externally published	Yes

Bibliographical note

Funding Information:
The research of Guojing LI, Dongxiao WANG, and Yeqiang SHU was supported by the National Key Research and Development Program of China (Grant No. 2018YFC1405701), the National Natural Science Foundation of China (Grant Nos. 92158204, 41506001, 42076019, 42076026 and 41876017), and the Project supported by Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) (Grant No. GML2019ZD0304). Lian SHEN acknowledges the support by University of Minnesota. The large eddy simulation model is provided by National Center for Atmospheric Research. All numerical calculations were carried out at the High Performance Computing Center (HPCC) of the South China Sea Institute of Oceanology, Chinese Academy of Sciences.

Publisher Copyright:
© 2022, Institute of Atmospheric Physics/Chinese Academy of Sciences, and Science Press and Springer-Verlag GmbH Germany, part of Springer Nature.

Keywords

Coriolis parameter
Langmuir turbulence
large eddy simulation
the upper mixed layer

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10.1007/s00376-021-1390-6

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title = "Influence of Coriolis Parameter Variation on Langmuir Turbulence in the Ocean Upper Mixed Layer with Large Eddy Simulation",

abstract = "Langmuir turbulence is a complex turbulent process in the ocean upper mixed layer. The Coriolis parameter has an important effect on Langmuir turbulence through the Coriolis-Stokes force and Ekman effect, however, this effect on Langmuir turbulence has not been systematically investigated. Here, the impact of the Coriolis parameter on Langmuir turbulence with a change of latitude (LAT) from 20°N to 80°N is studied using a non-hydrostatic large eddy simulation model under an ideal condition. The results show that the ratio of the upper mixed layer depth to Ekman depth scale (RME) RME = 0.266 (LAT = 50°N) is a key value (latitude) for the modulation effect of the Coriolis parameter on the mean and turbulent statistics of Langmuir turbulence. It is found that the rate of change of the sea surface temperature, upper mixed layer depth, entrainment flux, crosswind velocity, downwind vertical momentum flux, and turbulent kinetic energy budget terms associated with Langmuir turbulence are more evident at RME ⩽ 0.266 (LAT ⩽ 50°N) than at RME ⩾ 0.266 (LAT ⩾ 50°N). However, the rate of change of the depth-averaged crosswind vertical momentum flux does not have a clear variation between RME ⩽ 0.266 and RME ⩾ 0.266. The complex changes of both Langmuir turbulence characteristics and influence of Langmuir turbulence on the upper mixed layer with latitude presented here may provide more information for further improving Langmuir turbulence parameterization.",

keywords = "Coriolis parameter, Langmuir turbulence, large eddy simulation, the upper mixed layer",

author = "Dongxiao Wang and Guojing Li and Lian Shen and Yeqiang Shu",

note = "Funding Information: The research of Guojing LI, Dongxiao WANG, and Yeqiang SHU was supported by the National Key Research and Development Program of China (Grant No. 2018YFC1405701), the National Natural Science Foundation of China (Grant Nos. 92158204, 41506001, 42076019, 42076026 and 41876017), and the Project supported by Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) (Grant No. GML2019ZD0304). Lian SHEN acknowledges the support by University of Minnesota. The large eddy simulation model is provided by National Center for Atmospheric Research. All numerical calculations were carried out at the High Performance Computing Center (HPCC) of the South China Sea Institute of Oceanology, Chinese Academy of Sciences. Publisher Copyright: {\textcopyright} 2022, Institute of Atmospheric Physics/Chinese Academy of Sciences, and Science Press and Springer-Verlag GmbH Germany, part of Springer Nature.",

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doi = "10.1007/s00376-021-1390-6",

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T1 - Influence of Coriolis Parameter Variation on Langmuir Turbulence in the Ocean Upper Mixed Layer with Large Eddy Simulation

AU - Wang, Dongxiao

AU - Li, Guojing

AU - Shen, Lian

AU - Shu, Yeqiang

N1 - Funding Information: The research of Guojing LI, Dongxiao WANG, and Yeqiang SHU was supported by the National Key Research and Development Program of China (Grant No. 2018YFC1405701), the National Natural Science Foundation of China (Grant Nos. 92158204, 41506001, 42076019, 42076026 and 41876017), and the Project supported by Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) (Grant No. GML2019ZD0304). Lian SHEN acknowledges the support by University of Minnesota. The large eddy simulation model is provided by National Center for Atmospheric Research. All numerical calculations were carried out at the High Performance Computing Center (HPCC) of the South China Sea Institute of Oceanology, Chinese Academy of Sciences. Publisher Copyright: © 2022, Institute of Atmospheric Physics/Chinese Academy of Sciences, and Science Press and Springer-Verlag GmbH Germany, part of Springer Nature.

PY - 2022/9

Y1 - 2022/9

N2 - Langmuir turbulence is a complex turbulent process in the ocean upper mixed layer. The Coriolis parameter has an important effect on Langmuir turbulence through the Coriolis-Stokes force and Ekman effect, however, this effect on Langmuir turbulence has not been systematically investigated. Here, the impact of the Coriolis parameter on Langmuir turbulence with a change of latitude (LAT) from 20°N to 80°N is studied using a non-hydrostatic large eddy simulation model under an ideal condition. The results show that the ratio of the upper mixed layer depth to Ekman depth scale (RME) RME = 0.266 (LAT = 50°N) is a key value (latitude) for the modulation effect of the Coriolis parameter on the mean and turbulent statistics of Langmuir turbulence. It is found that the rate of change of the sea surface temperature, upper mixed layer depth, entrainment flux, crosswind velocity, downwind vertical momentum flux, and turbulent kinetic energy budget terms associated with Langmuir turbulence are more evident at RME ⩽ 0.266 (LAT ⩽ 50°N) than at RME ⩾ 0.266 (LAT ⩾ 50°N). However, the rate of change of the depth-averaged crosswind vertical momentum flux does not have a clear variation between RME ⩽ 0.266 and RME ⩾ 0.266. The complex changes of both Langmuir turbulence characteristics and influence of Langmuir turbulence on the upper mixed layer with latitude presented here may provide more information for further improving Langmuir turbulence parameterization.

AB - Langmuir turbulence is a complex turbulent process in the ocean upper mixed layer. The Coriolis parameter has an important effect on Langmuir turbulence through the Coriolis-Stokes force and Ekman effect, however, this effect on Langmuir turbulence has not been systematically investigated. Here, the impact of the Coriolis parameter on Langmuir turbulence with a change of latitude (LAT) from 20°N to 80°N is studied using a non-hydrostatic large eddy simulation model under an ideal condition. The results show that the ratio of the upper mixed layer depth to Ekman depth scale (RME) RME = 0.266 (LAT = 50°N) is a key value (latitude) for the modulation effect of the Coriolis parameter on the mean and turbulent statistics of Langmuir turbulence. It is found that the rate of change of the sea surface temperature, upper mixed layer depth, entrainment flux, crosswind velocity, downwind vertical momentum flux, and turbulent kinetic energy budget terms associated with Langmuir turbulence are more evident at RME ⩽ 0.266 (LAT ⩽ 50°N) than at RME ⩾ 0.266 (LAT ⩾ 50°N). However, the rate of change of the depth-averaged crosswind vertical momentum flux does not have a clear variation between RME ⩽ 0.266 and RME ⩾ 0.266. The complex changes of both Langmuir turbulence characteristics and influence of Langmuir turbulence on the upper mixed layer with latitude presented here may provide more information for further improving Langmuir turbulence parameterization.

KW - Coriolis parameter

KW - Langmuir turbulence

KW - large eddy simulation

KW - the upper mixed layer

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ER -

Influence of Coriolis Parameter Variation on Langmuir Turbulence in the Ocean Upper Mixed Layer with Large Eddy Simulation

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