Effect of wind stress forcing on ocean dynamics at air-sea interface

Hussein YAHIA; Veronique GARÇON; Joel SUDRE; Christophe MAES

doi:10.1631/FITEE.1700797

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Effect of wind stress forcing on ocean dynamics at air-sea interface

Special Issue on Marine Information Technology | Updated：2022-05-19

- Effect of wind stress forcing on ocean dynamics at air-sea interface
- 风力对海空界面海洋动力学的影响
- Frontiers of Information Technology & Electronic Engineering Vol. 19, Issue 8, Pages: 1056-1062(2018)
- Affiliations：
  
  Research Center INRIA Bordeaux - South West, Talence 33405, France
  CNRS, LEGOS Laboratory, Toulouse 31400, France
  Brest University, CNRS, IRD, IFREMER, LOPS, IUEM, Brest 29238, France
- Author bio：
  
  Hussein YAHIA, E-mail: hussein.yahia@inria.fr
  [ "Veronique GARÇON, E-mail: veronique.garcon@legos.obs-mip.fr" ]
  [ "Joel SUDRE, E-mail: joel.sudre@legos.obs-mip.fr" ]
  [ "Christophe MAES, E-mail: christophe.maes@ird.fr" ]
- Funds：
- DOI：10.1631/FITEE.1700797
  CLC： TP391
- Received：29 November 2017，
  
  Revised：2018-;8-;9，
  
  Published：2018-08
- Accepted：
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Hussein YAHIA, Veronique GARÇON, Joel SUDRE, et al. Effect of wind stress forcing on ocean dynamics at air-sea interface[J]. Frontiers of Information Technology & Electronic Engineering, 2018, 19(8): 1056-1062.
DOI：

Hussein YAHIA, Veronique GARÇON, Joel SUDRE, et al. Effect of wind stress forcing on ocean dynamics at air-sea interface[J]. Frontiers of Information Technology & Electronic Engineering, 2018, 19(8): 1056-1062. DOI： 10.1631/FITEE.1700797.

摘要

证实并研究了海气界面风力强迫作用下的海洋动力学湍流统计差异。海气相互作用下的海洋表层流至关重要，因为它能够将热量从低纬度输送到高纬度。在一阶方程中，海洋表层的洋流包括由科里奥利力和压力梯度力的平衡产生的地转流，以及科里奥利力和以风应力为主的摩擦力平衡产生的埃克曼流。本研究是在微正则多重分形形态学框架下，计算光谱形状的统计矩。应用一年的每日遥感高度计和遥感风数据资料，可以计算两种矢量场：有风场和无风场强迫的地转流。利用速度规范和涡度数据研究了奇异谱的统计特性，特别是与峰度信息的关系，以强调两种地转流速度场在湍流状态下的差异。

Abstract

We evidence and study the differences in turbulence statistics in ocean dynamics carried by wind forcing at the air-sea interface. Surface currents at the air-sea interaction are of crucial importance because they transport heat from low to high latitudes. At first order

oceanic currents are generated by the balance of the Coriolis and pressure gradient forces (geostrophic current) and the balance of the Coriolis and the frictional forces dominated by wind stress (Ekman current) in the surface ocean layers. The study was conducted by computing statistical moments on the shapes of spectra computed within the framework of microcanonical multi-fractal formalism. Remotely sensed daily datasets derived from one year of altimetry and wind data were used in this study

allowing for the computation of two kinds of vector fields: geostrophy with and geostrophy without wind stress forcing. We explore the statistical properties of singularity spectra computed from velocity norms and vorticity data

notably in relation with kurtosis information to underline the differences in the turbulent regimes associated with both kinds of velocity fields.

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references

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