Earth global reference atmospheric model (GRAM-99) and trace constituents

Details Earth global reference atmospheric model (GRAM-99) and trace constituents Earth global reference atmospheric model (GRAM-99) and trace constituents

Jan 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004adspr..34.1731j&link_type=abstract

Advances in Space Research, Volume 34, Issue 8, p. 1731-1735.

Physics

Geophysics

1

Earth Global Reference Atmosphereic Model, (Gram 99), Trace Constituents

Scientific paper

Global reference atmospheric model (GRAM-99) is an engineering-level model of the Earth's atmosphere. It provides both mean values and perturbations for density, temperature, pressure, and winds, as well as monthly- and geographically-varying trace constituent concentrations. From 0 to 27 km altitude, thermodynamics and winds are based on National Oceanic and Atmospheric Administration Global Upper Air Climatic Atlas (GUACA) climatology. Above 120 km altitude, GRAM is based on the NASA Marshall Engineering Thermosphere (MET) model. In the intervening altitude region, GRAM is based on Middle Atmosphere Program (MAP) climatology that also forms the basis of the 1986 COSPAR International Reference Atmosphere (CIRA). MAP data in GRAM are augmented by specially derived longitude variation climatology. Atmospheric composition is represented in GRAM by concentrations of both major and minor species. Above 120 km, MET provides concentration values for N2, O2, Ar, O, He, and H. Below 120 km, species represented also include H2O, O3, N2O, CO, CH4, and CO2. Water vapor in GRAM is based on a combination of GUACA, Air Force Geophysics Laboratory (AFGL), and NASA Langley Research Center climatologies. Other constituents below 120 km are based on a combination of AFGL and MAP/CIRA climatologies. This report presents results of comparisons between GRAM constituent concentrations and those provided by Naval Research Laboratory (NRL) climatology. GRAM and NRL concentrations were compared for seven species (CH4, CO, CO2, H2O, N2O, O2, and OH3) for months January, April, July, and October, over height range 0-115 km, and latitudes -90° to + 90° at 10° increments. Average GRAM-NRL correlations range from 0.878 (for CO) to 0.975 (for OH3), with an average over all seven species of 0.936 (SD 0.049).

Affiliated with

Also associated with

No associations

Rating

Earth global reference atmospheric model (GRAM-99) and trace constituents does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Earth global reference atmospheric model (GRAM-99) and trace constituents, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Earth global reference atmospheric model (GRAM-99) and trace constituents will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1838943