Mars Atmosphere-Ice Coupler MAIC-2

The Mars Atmosphere-Ice Coupler MAIC-2 is a simple, latitudinal model that consists of a set of parameterisations for the surface temperature, the atmospheric water transport and the surface mass balance (condensation minus evaporation) of water ice. It is driven directly by orbital parameters. A detailed description of the model is given by Greve et al. (2010, 2012).

The model equations of MAIC-2 are discretised by a finite-difference/finite-volume scheme. Coding is done in the programming language Fortran 90.

Required model forcing
(as functions of time):

  • Obliquity (axial tilt).
  • Orbital eccentricity.
  • Solar longitude (Ls)
    of perihelion.

Output (as functions of latitude and time):

  • Surface temperature.
  • Evaporation rate of water ice.
  • Condensation rate of water ice.
  • Atmospheric water content.
  • Surface mass balance of water ice.
  • Ice thickness.

How to get MAIC-2

Legal notes

MAIC-2 is free software. It can be redistributed and/or modified under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at the user's option) any later version. Referencing Greve et al. (2010, 2012) is appreciated.

MAIC-2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.


  • Quick Start Manual (PDF).
  • References below.
  • The source code itself is reasonably well documented.


  • Please contact  maic2help <at-nospam>


Greve, R., B. Grieger and O. J. Stenzel. 2010.
MAIC-2, a latitudinal model for the Martian surface temperature, atmospheric water transport and surface glaciation.
Planetary and Space Science 58 (6), 931-940, doi:10.1016/j.pss.2010.03.002.
Authors' version @ arXiv:0903.2688 [physics.geo-ph].

Greve, R., B. Grieger and O. J. Stenzel. 2012.
Glaciation of Mars from 10 million years ago until 10 million years into the future simulated with the model MAIC-2.
Presentation No. PPS03-06, JpGU Meeting, Makuhari Messe, Chiba, Japan, 24 May 2012,

Page maintained by Ralf Greve
Last modified: 2020-03-12