Dry deposition, surface production and dynamics of aerosols in the marine boundary layer

Abstract A model of downward aerosol panicle flux characterized by dry deposition velocity, V d , due to Slinn and Slinn (1980) is generalized to the case of nonzero surface concentration (absorbing surface with a surface source). A more general expression for the flux at some reference height is developed which includes V d and an effective surface source strength, S i , which is a function of the true surface source strength, S i , and the particle transport properties below the reference height. The general expression for the surface flux is incorporated into a dynamic mixed layer model of the type developed by Davidson et al . (1983). This three layer model (diffusion sublayer, turbulent surface layer and mixed layer) is applied to an open ocean marine regime where boundary layer advection is ignored. The aerosol concentration in the boundary layer is considered to consist of sea salt particles produced as droplets at the surface and ‘continental’ background aerosols brought into the boundary layer at the top by entrainment and gravitational settling. Estimates of S i are provided.

[1]  D. Blanchard,et al.  The electrification of the atmosphere by particles from bubbles in the sea , 1963 .

[2]  Gordon E. Schacher,et al.  Application of a mixed‐layer model to aerosols in the marine boundary layer , 1984 .

[3]  B. Hicks,et al.  Some aspects of the transfer of atmospheric trace constituents past the air-sea interface , 1978 .

[4]  J. W. Fitzgerald.  Approximation Formulas for the Equilibrium Size of an Aerosol Particle as a Function of Its Dry Size and Composition and the Ambient Relative Humidity , 1975 .

[5]  Harlan G. Hughes.  Aerosol Extinction Coefficient Variations with Altitude at 3.75 , 1980 .

[6]  Thomas P. Charlock,et al.  Aerosol effects on climate - Calculations with time-dependent and steady-state radiative-convective models , 1980 .

[7]  Thomas A. McMahon,et al.  Empirical atmospheric deposition parameters—A survey , 1979 .

[8]  J. Wyngaard,et al.  The Budgets of Turbulent Kinetic Energy and Temperature Variance in the Atmospheric Surface Layer , 1971 .

[9]  Yoshiaki Toba,et al.  On the giant sea-salt particles in the atmosphere: 11. Theory of the Vertical Distribution in the 10-m Layer Over the Ocean11 The research in this paper was sponsored by the Atmospheric Sciences Program, National Science Foundation, NSF grant G 22292. , 1965 .

[10]  L. Hasse,et al.  Gas exchange across the air-sea interface , 1980 .

[11]  M. Wesely,et al.  Field measurement of small ozone fluxes to snow, wet bare soil, and lake water , 1981 .

[12]  M. Wesely,et al.  Air‐sea exchange of CO2 and evidence for enhanced upward fluxes , 1982 .

[13]  W. Slinn,et al.  Predictions for particle deposition on natural waters , 1980 .

[14]  W. Liu,et al.  Bulk Parameterization of Air-Sea Exchanges of Heat and Water Vapor Including the Molecular Constraints at the Interface , 1979 .

[15]  E. F. Bradley,et al.  Flux-Profile Relationships in the Atmospheric Surface Layer , 1971 .

[16]  茶円 正明.  Studies on the production of sea-salt particles on the sea surface , 1973 .

[17]  Donald H. Lenschow,et al.  Mean-Field and Second-Moment Budgets in a Baroclinic, Convective Boundary Layer , 1980 .

[18]  M. Kritz,et al.  Circulation of Na, Cl, and Br in the tropical marine atmosphere , 1980 .

[19]  R. L. Street,et al.  Fluxes Through the Boundary Layers at an Air-Water Interface: Laboratory Studies , 1978 .

[20]  D. E. Spiel,et al.  Whitecap aerosol productivity deduced from simulation tank measurements , 1982 .

[21]  Kenneth L. Davidson,et al.  An analysis of the surface production of sea-salt aerosols , 1983 .