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The effect of Coriolis-Stokes forcing on upper ocean circulation in a two-way coupled wave-current model

Chinese Journal of Oceanology and Limnology 2012年第2期30卷 321-335页

作者：邓增安谢立安韩桂军张学峰吴克俭 National Marine Data and Information Service Key Lab of Marine Environmental Information Technology SOA Department of Marine Earth and Atmospheric SciencesNorth Carolina State University Physical Oceanography Laboratory Ocean University of China

We investigated the Stokes drift-driven ocean currents and Stokes drift-induced wind energy input into the upper ocean using a two-way coupled wave-current modeling system that consists of the Princeton Ocean model generalized coordinate system (POMgcs), Simulating waves Nearshore (SWAN) wave model, and the model Coupling Toolkit (MCT). The Coriolis-Stokes forcing (CSF) computed using the wave parameters from SWAN was incorporated with the momentum equation of POMgcs as the core coupling process. Experimental results in an idealized setting show that under the steady state, the scale of the speed of CSF-driven current was 0.001 m/s and the maximum reached 0.02 m/s. The Stokes drift-induced energy rate input into the model ocean was estimated to be 28.5 GW, taking 14% of the direct wind energy rate input. Considering the Stokes drift effects, the total mechanical energy rate input was increased by approximately 14%, which highlights the importance of CSF in modulating the upper ocean circulation. The actual run conducted in Taiwan Adjacent Sea (TAS) shows that: 1) CSF-based wave-current coupling has an impact on ocean surface currents, which is related to the activities of monsoon winds; 2) wave-current coupling plays a significant role in a place where strong eddies present and tends to intensify the eddy's vorticity; 3) wave-current coupling affects the volume transport of the Taiwan Strait (TS) throughflow in a nontrivial degree, 3.75% on average.

关键词： coupled wave-current model Coriolis-Stokes forcing (CSF) energy rate ocean circulation

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EFFECTS OF wave-current INTERACTIONS ON BOTTOM STRESS AND currentS

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Journal of Hydrodynamics 2003年第5期15卷 13-19页

作者： YinBao-shu YangDe-zhou LinXiang HouYi-jun ChengMing-hua WillPerrie InstituteofOceanology ChineseAcademyofSciencesQingdao266071China TrafficandOceanEngineeringCollege HohaiUniversityNanjing210098China BedfordInstituteofOceanography DartmouthNovaScotiaB2Y4A2Canada GraduateSchooloftheChineseAcademyofSciences Beijing100039China

This paper presents a high-resolution (2′X2′) numerical model of coastalcoupled wave-current interaction with explicit consideration of the effects of wave-currentinteraction on bottom stress. For two selected storms with measured data in the Yellow River coastalarea of the Bohai Sea, it is shown that the bottom stress calculated by using a coupledwave-current model is increased, as one would expect, compared with the bottom stress computed withan uncoupled current model. Moreover, the current velocity field is also changed, but thecorresponding current directions show less influence in the two simulations. The extents of changesin bottom stress and current velocity vary with storm intensities. The results further imply thatthe coupled wave-current model should be used as the basis for simulating the current velocity andsea level in the near shore region.

关键词： coupled wave-current model bottom stress coastal area

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