GADS atmosphere

During the course of this contract, SWA researched various Mars GCM models such as Mars Climate Database, NASA AMES Mars GCM and NASA MARS-GRAM and attended a NASA workshop; Proper Use of Mars Atmospheric Models. While it is planned that a future version of the MLSM will be able to simulate on many AMES and MCD databases for various time of the year and dust events, currently the MLSM is set up to only simulate on a 1 day MCD database. The Mars Climate Database Surveyor for spring 2001 (Ls 0-30) from the Martian Global Circulation Model (Lewis et. al., 1999) was selected as the Nature Run first candidate due to the ease of obtaining the data set over the web. The horizontal resolution of the database is 5^ox5^o for every two hours. A record's content is shown for each GADS type below. The data profiles are for 32 atmospheric sigma levels. Graphic examples of selected profile variables for hour 00z are provided.

Mars Climate Database Surveyor-based GADS Data Record

adjusted MOLA terrain (m)

surface Pressure (pa)

surface Temperature (k)

Profile of Height referenced from minimum terrain (km)

Profile of mean "boundary layer" eddy kinetic energy (m2/s2)

Profile of mean density (kg/m3)

120 114 110 106 101 97 92 87 82 77 71 65 60 54 48 43 37 31

25 19.5 14.2 9.6 7 3.4 1.8 0.98 0.49 0.24 0.115 0.05 0.02 0.005

Profile of mean temperature (K)

120 114 110 106 101 97 92 87 82 77 71 65 60 54 48 43 37 31

25 19.5 14.2 9.6 7 3.4 1.8 0.98 0.49 0.24 0.115 0.05 0.02 0.005

Profile of horizontal Wind Component U (M/S)

120 114 110 106 101 97 92 87 82 77 71 65 60 54 48 43 37 31

25 19.5 14.2 9.6 7 3.4 1.8 0.98 0.49 0.24 0.115 0.05 0.02 0.005

Profile of horizontal Wind Component V (M/S)

120 114 110 106 101 97 92 87 82 77 71 65 60 54 48 43 37 31

25 19.5 14.2 9.6 7 3.4 1.8 0.98 0.49 0.24 0.115 0.05 0.02 0.005

Profile of subgrid scale standard deviation in U (9 point) (M/S)

Profile of subgrid scale standard deviation in V (9 point) (M/S)

Profile of subgrid scale standard deviation in W (9 point) (M/S)

Since the VB graphic tool for displaying GADS variables is not operational in the MLSM version 1.0, SWA is providing a simple Fortran model that reads the GADS and creates an ASCII atmosphere file for the user to use in their graphic tools.