Impact of Updating Information on the Atmospheric Gas Absorption Line Parameters on the Results of Simulations of IR Radiative Fluxes in the Atmosphere.

Autor: Chesnokova, T. Yu., Firsov, K. M.
Zdroj: Atmospheric & Oceanic Optics; Oct2023, Vol. 36 Issue 5, p539-549, 11p
Abstrakt: The impact of uncertainties of the atmospheric gas absorption line parameters in the modern spectroscopic databases on the simulation of longwave fluxes in the atmosphere is estimated. The mass calculations of downward and upward IR fluxes are carried out for meteorological conditions observed in summer months in the Lower Volga Region and winter months in Novosibirsk and for average zonal meteorological models. The radiative fluxes and cooling rates at different levels of the atmosphere calculated using new versions of HITRAN and GEISA spectroscopic databases and their previous versions are compared. It is shown that the difference in absorption line parameters in the spectroscopic databases leads to an error less than 0.7 W/m2 (0.3%) in the simulated integral fluxes in the 0–3000 cm−1 region, at that the relative differences in the spectral fluxes calculated with moderate spectral resolution (20 cm−1) are up to 10%. The atmospheric gases and spectral intervals contributing more to the errors in the IR flux simulations due to uncertainties of initial spectroscopic information are revealed. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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