Modeling of the general circulation with the LMD-AOPP-IAA GCM: Update on model design and comparison with observations

Forget, F.; Angelats i Coll, M.; Wanherdrick, Y.; Hourdin, F.; Lewis, S.; Read, P.; Taylor, F.; Lopez-Valverde, M. and Lopez-Puertas, M. (2003). Modeling of the general circulation with the LMD-AOPP-IAA GCM: Update on model design and comparison with observations. In: First International Workshop on Mars atmosphere modelling and observations, 13-15 Jan 2003, Granada, Spain.

URL: http://www-mars.lmd.jussieu.fr/granada2003/abstrac...

Abstract

The LMD-AOPP GCM is developed conjointly by LMD in Paris and AOPP in Oxford, with the collaboration of
IAA in Granada for the physical processes specific to the upper atmosphere. The collaboration between the
two teams is based on the use of two different dynamical core (gridpoint at LMD, spectral at AOPP), which
allow us to estimate the likely uncertainty arising from certain types of modeling errors. Similarly, we use
different schemes to compute tracer transport, etc. The work has benefited from support from ESA (since 1995)
and CNES (since 2000). Within that context, the GCMs are used to produce a Martian climate 'database' which
is used by more than 30 teams around the world for mission design and scientific studies (see Bingham et al.,
this issue and Lewis et al., 1999). The baseline version of the GCM is described in detail in Forget et al. (1999). Here we describe the recent improvement and design changes since this publication. Compared to this previous version, the new GCM covers a wider range of altitude, from 0 to 120km in the vertical, it uses improved topography and thermal inertia surface
maps from Mars Global Surveyor (MGS), and includes a new 'dust scenario' to describe the distribution of airborne dust in the atmosphere.

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