Multi-Year Effects Of Global Dust Storms On The Polar Heat
Budget And Co2 Snowfall On Mars.
P. O. Hayne, N. Alsaeed, V. Concepcion, Laboratory For Atmospheric And Space Physics, University Of Colorado
Boulder (Paul.Hayne@Colorado.Edu), D. M. Kass, S. Piqueux, J. Bapst, A. Kleinboehl, Nasa - Jet Propulsion
Laboratory, California Institute Of Technology.

Introduction
Planetary Scale Dust Storms Are Known To Have Measurable, Though Typically Short-Lived Effects On The Climate And Atmospheric Circulation Of Mars. Occurring
On Roughly Decadal Timescales, These Global Events Increase Planetary Albedo, Warm The Surface At Night, And
Transport Water To High Altitudes, Contributing To Its Loss
From The Upper Atmosphere [1, 2].
Here, We Report Multi-Year Impacts Of Dust Storms
On Polar Temperatures, Co2 Snowfall, And The Extent And
Retreat Of The Seasonal Polar Caps. We Focus Primarily On
The 2007 (Mars Year 28) Global Dust Event (Gde) Using
Data From The Mars Climate Sounder (Mcs) [3]. The
Polar Regions Are Fundamental To The Global Co2 Cycle
On Mars, Controlling The ∼30% Annual Variation In Total
Atmospheric Mass, And Buffering Mean Surface Pressures.
Therefore, Changes In The Polar Regions Induced By Gde