Radiative interactions between Arctic sea ice and boundary layer stratus clouds / by Elizabeth E. Ebert.

By: University of Wisconsin--Madison 1984Description: 81 leaves : diagrs. ; 29 cmContent type:
  • text
Media type:
  • unmediated
Carrier type:
  • volume
Subject(s): Dissertation note: Thesis (M.S.)--University of Wisconsin--Madison, 1984. Summary: A one-dimensional thermodynamic sea ice and atmospheric mixed layer model was developed to simulate the annual cycles of sea ice and boundary layer stratus cloud thickness, temperature, and radiation in the Central Arctic. The primary objective was to investigate the radiative interactions and feedbacks between the ice and the clouds. The turbulent, dynamic, and hydrological processes were treated as non-interactive for the purpose of isolating the radiative processes. Model runs using various degrees of radiative interaction revealed the primarily positive nature of the longwave feedbacks and the primarily negative nature of the shortwave feedbacks, but showed the inclusion of both longwave and shortwave interactions had only minor effects on the predicted equilibrium sea ice and stratus cloud conditions. Small variations in prescribed fractional cloudiness produced significant changes in ice conditions, a result of the altered solar and longwave radiation balance.
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Typescript.

Thesis (M.S.)--University of Wisconsin--Madison, 1984.

Includes bibliographical references (leaves 71-73).

A one-dimensional thermodynamic sea ice and atmospheric mixed layer model was developed to simulate the annual cycles of sea ice and boundary layer stratus cloud thickness, temperature, and radiation in the Central Arctic. The primary objective was to investigate the radiative interactions and feedbacks between the ice and the clouds. The turbulent, dynamic, and hydrological processes were treated as non-interactive for the purpose of isolating the radiative processes. Model runs using various degrees of radiative interaction revealed the primarily positive nature of the longwave feedbacks and the primarily negative nature of the shortwave feedbacks, but showed the inclusion of both longwave and shortwave interactions had only minor effects on the predicted equilibrium sea ice and stratus cloud conditions. Small variations in prescribed fractional cloudiness produced significant changes in ice conditions, a result of the altered solar and longwave radiation balance.

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