Data Set Information
DATA_SET_NAME AMES MARS GENERAL CIRCULATION MODEL 5 LAT LON VARIABLES V1.0
DATA_SET_ID MODEL-M-AMES-GCM-5-LAT-LON-V1.0
NSSDC_DATA_SET_ID
DATA_SET_TERSE_DESCRIPTION
DATA_SET_DESCRIPTION Data Set Overview : The Ames Mars General Circulation Model is a three dimensional model based on the primitive equations of meteorology. It includes the radiative effects of dust and carbon dioxide as well as other features such as large-scale topography (see [POLLACKETAL1990]; [BARNESETAL1993]; and [HABERLEETAL1993]). The model has 25 latitude bins (7.5 degree resolution), 40 longitude bins (9.0 degree resolution) and 13 vertical layers. The spacing between each layer varies. The following array defines the layer spacing from the tropopause to the surface in mbars: 0.005779, 0.009511, 0.01568, 0.02585, 0.04263, 0.07025, 0.1159, 0.1544, 0.1586, 0.1364, 0.1223, 0.09270, 0.05000. The model spins up from a resting isothermal state with the global temperature equal to 200K. The spin up starts with hour equal to 0. The model saves data every 1.5 hours for a total of 16 hour bins per day. Some other initial conditions that are set when the model spins up: INITIAL SURFACE PRESSURE : 7.60 mbars TROPOPAUSE PRESSURE : 0.06699 mbars DUST OPTICAL DEPTH : 0.3 (for periods where Ls < 200) DUST OPTICAL DEPTH : 1.0 (for periods where Ls > 200) ICE CLOUD OPTICAL DEPTH : 0.00 TIME STEP : 9.25 minutes RICHARDSON NUMBER TIME SCALE : 200000000. seconds SCALE HEIGHT FOR DUST PROFILE : 0.03000 TIME CONSTANT FOR RAYLEIGH FRICTION : 2.0000 days This data set is composed of 20 to 30 day averages of the data resulting from model runs simulating martian conditions for four Ls periods during 1977 (Ls 10-24, 94-103, 202-220, and 267-286). Native start time : 10.15 AREOCENTRIC LON, EARTH YEAR 1977 Native stop time : 286.09 AREOCENTRIC LON, EARTH YEAR 1977 The lat-lon data set contains the instantaneous values for the surface temperature minimum and maximum, and for the amount of CO2 frost on the ground. The data are given as a function of longitude and latitude. The calculations are done in the pi coordinate system; pi coordinates are located at the intersection points of a set of evenly spaced latitude circles and a set of evenly spaced longitude circles. The data set is in the following configuration (listed as field followed by description): LATITUDE Latitude, degrees LONGITUDE Longitude, degrees SURF_TEMP_MIN Minimum surface temperature, K SURF_TEMP_MAX Maximum surface temperature, K CO2_FROST Mass of CO2 frost on the ground, kg/m**2
DATA_SET_RELEASE_DATE 1995-01-01T00:00:00.000Z
START_TIME 1994-11-01T12:00:00.000Z
STOP_TIME 1994-12-01T12:00:00.000Z
MISSION_NAME
MISSION_START_DATE
MISSION_STOP_DATE
TARGET_NAME MARS
TARGET_TYPE PLANET
INSTRUMENT_HOST_ID MODEL
INSTRUMENT_NAME UNKNOWN
INSTRUMENT_ID AMES-GCM
INSTRUMENT_TYPE UNKNOWN
NODE_NAME Planetary Atmospheres
ARCHIVE_STATUS ARCHIVED
CONFIDENCE_LEVEL_NOTE Confidence Level Overview : The Ames Mars General Circulation Model is a three dimensional computer model based upon the primitive equations of meteorology. It includes the radiative effects of dust and carbon dioxide as well as other features such as large-scale topography. Model results are dependent upon the selected initial conditions and spatial and temporal resolution of the model, and may not fully incorporate the effects of some physical processes represented by paramaterizations made by the model.
CITATION_DESCRIPTION Citation TBD
ABSTRACT_TEXT The Ames Mars General Circulation Model is a three dimensional model based on the primitive equations of meteorology. It includes the radiative effects of dust and carbon dioxide as well as other features such as large-scale topography (see [POLLACKETAL1990]
PRODUCER_FULL_NAME MAUREEN BELL
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