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Modification of Turbulence at the Air-Sea Interface Due to the Presence of Surfactants and Implications for Gas Exchange. Part I: Laboratory Experiment
Oceanography Faculty Books and Book Chapters
  • Alexander Soloviev, Nova Southeastern University; University of Miami
  • S. Matt, Nova Southeastern University; University of Miami
  • Mikhail Gilman, Nova Southeastern University
  • H. Huhnerfuss, University of Hamburg
  • Brian K. Haus, University of Miami
  • D. Jeong, University of Miami
  • I. Savelyev, University of Miami
  • Mark A. Donelan, University of Miami
Book Title
Gas Transfer at Water Surfaces 2010
Document Type
Book Chapter
Editors
S. Komori, W. McGillis, R. Kurose
Description
The air-sea gas transfer of gases like CO2 is substantiallydetermined bythe properties of the aqueous diffusion sublayer and free-surface turbulent boundarylayer. Little is known about the effect of surfactants on turbulence in the near-surface layer of the ocean. In order to investigate the effect of surfactants on turbulent exchanges below the air-sea interface, we have conducted a series of laboratoryexperiments at the UM RSMAS Air-Sea Interaction Saltwater Tank (ASIST) facility. Results from these experiments demonstrate that the surfactant monolayer suppresses turbulence and reduces drag below the water surface and increases the surface drift velocity. This effect is important for parameterization of the interfacial component of gas exchange under low wind speed conditions. From the theoretical standpoint, the mechanism of the turbulence reduction can be explained bythe modification of the “streaks” in the buffer zone near the interface byvisco-elastic properties of the water surface when surfactants are present. These findings are consistent with results from high-resolution non-hydrostatic numerical simulations presented in a companion paper.
Publication Date
1-1-2011
Publisher
Kyoto University Press
Keywords
  • Laboratory Experiments,
  • Surfactants,
  • Near-Surface Turbulence
ORCID ID
0000-0001-6519-1547
Citation Information
Alexander Soloviev, S. Matt, Mikhail Gilman, H. Huhnerfuss, et al.. "Modification of Turbulence at the Air-Sea Interface Due to the Presence of Surfactants and Implications for Gas Exchange. Part I: Laboratory Experiment" (2011)
Available at: http://works.bepress.com/alexander-soloviev/42/