Abstract
An energy budget model is used to study the effect on Arctic climate of optically active aerosol in the Arctic atmosphere. The dependence of the change in surface temperature on the vertical distribution of the aerosol and on the radiative properties of the aerosol-free atmosphere, the Arctic surface, and the aerosol, itself, are calculated. An extensive sensitivity analysis is performed to assess the degree to which the results of the model are dependent upon the assumptions underlying it.
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Abbreviations
- I 0 :
-
Solar flux at the top of the Arctic Atmosphere (‘Arctic’ here means 70° N latitude to the pole)
- a S :
-
Surface albedo of the Arctic (a c S is the value of surface albedo at which the sign of the surface temperature perturbation changes)
- ϱ :
-
Reflection coefficient of the aerosol-free Arctic atmosphere
- α :
-
Absorption coefficient of the aerosol-free Arctic atmosphere
- τ :
-
Transmission coefficient of the aerosol-free Arctic atmosphere
- RI 0 :
-
Total flux of sunlight reflected from the Arctic
- A A I 0 :
-
Total flux of sunlight absorbed in the Arctic atmosphere
- A S I 0 :
-
Total flux of sunlight absorbed at the Arctic surface
- A aer I 0 :
-
Total flux of sunlight absorbed in the Arctic aerosol
- Q A :
-
Net atmospheric flow of energy, per unit of Arctic surface area, north across 70° N latitude
- Q S :
-
Net oceanic flow of energy, per unit of Arctic surface area, north across 70° N latitude
- E :
-
Convective plus latent heat fluxes from surface to atmosphere
- F A :
-
Net flow of energy to the Arctic atmosphere
- F S :
-
Net flow of energy to the Arctic surface
- T A :
-
An effective temperature of the Arctic atmosphere
- T S :
-
Surface temperature of the Arctic
- w :
-
Single-scattering albedo of the aerosol
- t :
-
Optical depth of the aerosol
- g :
-
Fraction of incident radiation scattered forward by the aerosol
- ϱ′ :
-
Reflection coefficient of the aerosol
- α′ :
-
Absorption coefficient of the aerosol
- τ′ :
-
Transmission coefficient of the aerosol
- p,q :
-
Number of atmospheric layers and the inverse of the fraction of incident IR absorbed in each layer in the energy budget model
- F,G,H :
-
Measures of the amount of IR-active atmosphere above the surface, the aerosol, and the clouds
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Harte, J., Williams, J. Arctic aerosol and Arctic climate: Results from an energy budget model. Climatic Change 13, 161–189 (1988). https://doi.org/10.1007/BF00140568
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DOI: https://doi.org/10.1007/BF00140568