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AGU: Geophysical Research Letters

 

Index Terms

  • Atmospheric Composition and Structure: Air/sea constituent fluxes
  • Oceanography: Physical: Air/sea interactions
  • Oceanography: Physical: Turbulence, diffusion, and mixing processes
  • Oceanography: Physical: Fine structure and microstructure

Abstract

GEOPHYSICAL RESEARCH LETTERS, VOL. 30, 1968, 5 PP., 2003
doi:10.1029/2003GL018164

Molecular sublayers beneath the air-sea interface relative to momentum, heat and gas transports

Wu-ting Tsai

Institute of Hydrological Sciences, National Central University, Taoyuan, Taiwan

Department of Civil Engineering, National Chiao Tung University, Hsinchu, Taiwan

Shi-Ming Chen

Department of Civil Engineering, National Chiao Tung University, Hsinchu, Taiwan

Mei-Ying Lin

Department of Civil Engineering, National Chiao Tung University, Hsinchu, Taiwan

Li-Ping Hung

Department of Civil Engineering, National Chiao Tung University, Hsinchu, Taiwan

Numerical simulations of the wind-driven aqueous turbulent flow and the underlying heat and dissolved gas transports are conducted with sufficiently fine grid resolution to resolve the molecular sublayers immediately beneath the air-water interface. The simulated mean distributions of velocity, temperature and gas concentration all exhibit exponential profiles across the sublayers in accordance with the theoretical postulation of Liu and Businger [1975] which they derived on the basis of the conceptual surface renewal model. The numerical results identify two major coherent renewal processes within the flow: intermittent upwellings induced by uprising horseshoe-like eddies in the well-mixed region, and elongated, high-speed, cool streaks within the sublayer reflecting the cool-skin thermal structure.

Received 14 July 2003; accepted 27 August 2003; published 27 September 2003.

Citation: Tsai, W., S.-M. Chen, M.-Y. Lin, and L.-P. Hung (2003), Molecular sublayers beneath the air-sea interface relative to momentum, heat and gas transports, Geophys. Res. Lett., 30(18), 1968, doi:10.1029/2003GL018164.

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