Constraining The Warming Effect Of High-Altitude Water Ice Clouds On Early Mars In A 3d
Moist General Circulation Model With A Simplified Cloud Microphysical Scheme
F. Ding1,*, R. Wordsworth1,2, K. Loftus2, K. Steakley3, M. Kahre3, R. Haberle3. 1school Of Engineering And Applied
Sciences, Harvard University. 2department Of Earth And Planetary Sciences, Harvard University. 3nasa Ames
Research Center. *Fding.Dfdfdf@Gmail.Com.
Introduction: Geologic Evidence Suggests >102-Yrlong Lake-Forming Climates Persisted On Mars 3-4 Ga
[E.G., 1-3]. These Early Warm Climates Cannot Be Explained By The Greenhouse Effect Of Co2 And Water
Vapor Alone [4]. Recently, A Warming Mechanism For
Early Mars Based On High-Altitude Water Ice Clouds Was
Proposed, For Situations Where The Surface Water Inventory Is Limited And Far Away From Tropical Regions [5].
However, Microphysical Representations Of Clouds And
Precipitation Remain One Of The Main Uncertain Factors
For Climate Modeling Of Terrestrial Planets, Including
Present-Day Earth [6]. Here We Use A Three-Dimensional
Moist General Circulation Model (3d Moist Gcm) With
A Simplified Cloud Microphysical Scheme To Constrain
The Potential Warming Effect Of High-Altitude Water Ice
Clouds In A Physical Parameter Space.

Ble Water, And Surface Water Distributed Within 10°