Physics
Scientific paper
Nov 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3121102f&link_type=abstract
Geophysical Research Letters, Volume 31, Issue 21, CiteID L21102
Physics
10
Atmospheric Composition And Structure: Middle Atmosphere-Energy Deposition, Global Change: Atmosphere (0315, 0325), Meteorology And Atmospheric Dynamics: General Circulation, Meteorology And Atmospheric Dynamics: Numerical Modeling And Data Assimilation, Meteorology And Atmospheric Dynamics: Radiative Processes
Scientific paper
Absorption of solar energy by the near-infrared (NIR) CO2 bands provides an important source of heating in the mesosphere. At 60-85 km, this source exceeds 1 K day-1 and contributes up to 30% of the total solar heating. Calculation of the solar heating in the NIR CO2 bands requires consideration of complex non-local thermodynamic equilibrium (non-LTE) processes. The small energy effect, narrow region of importance, and the necessity to consider non-LTE effects, have accounted for the absence of an adequate parameterization for the NIR CO2 bands. Recently a parameterization has been developed and implemented into the Canadian Middle Atmosphere Model. Numerical experiments with this model have shown that inclusion of the NIR CO2 heating results in a significant warming of up to 8 K in the mesosphere for the current CO2 amount but does not significantly change the model thermal response induced by the doubling of CO2.
Beagley Stephen R.
Fomichev Victor I.
Ogibalov Vladimir P.
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