14th Symposium on Global Change and Climate Variations


Conceptual modeling of the climatic role of airborne mineral dust

Karen M. Shell, SIO/Univ. of California, La Jolla, CA; and R. C. J. Somerville

Airborne mineral dust is a significant aerosol component of the atmosphere. This project uses a simple, conceptual model to study the important processes and feedbacks within the dust-climate system.

The simple model consists of a longitudinally averaged atmosphere layer above a surface layer, which is ice-covered if the surface temperature is sufficiently low. Parameterizations of radiative, latent, and sensible heating and cooling, ocean heat transport, the Hadley circulation, and midlatitude eddies are included. The temperature profile determines the distribution of dust. Dust, in turn, can influence the temperature by altering the optical properties of air. The model will be used to gain an understanding of the fundamental properties of the dust-climate system.

Poster Session 1, Poster Session: I
Monday, 10 February 2003, 2:30 PM-4:00 PM

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