The three-dimensional photochemical model CHARM. Incorporation of solar activity

Abstract

We describe the numerical global photochemical model CHARM (CHemical Atmospheric Research Model) and the results of a numerical simulation of climatological distributions of ozone and other atmospheric trace gases in a height range of up to 90 km. We also present the results of numerical scenarios of an impact induced by a change in UV radiation fluxes in the solar activity cycle and conditioned by ozone depletion in polar regions by high energy particles of cosmic origin. The spatial transport of chemically active species is described in the model (the Prather scheme) on the basis of global fields of wind components and temperature calculated by the ARM (Atmospheric Research Model) general circulation model.

The three-dimensional global numerical model CHARM-I: The incorporation of processes in the ionospheric D-region

“…The results showed a good agreement with observations Brasseur and Solomon, 2005;Mironova et al, 2015) and data obtained in one dimensional models of the D region by other authors ; Ondrášková, 1993;Brasseur and Solomon, 2005;Ozolin et al, 2009). In this paper, the results on neutral com ponents are not presented, because they are almost the same (in this case, quiet conditions were considered) as the calculation results obtained by the CHARM model (Krivolutsky et al, 2015). It should be noted that the ionizing factors in this version of the model involved only the ionization of nitric oxide by radiation from Ly α and galactic cos mic rays.…”

“…This paper presents the first results obtained by the global three dimensional photochemical model CHARM I (Chemical Atmospheric Research Model with Ions), which was developed in the Laboratory of Chemistry and Atmospheric Dynamics (LCAD) of the Central Aerological Observatory. This model is an extension of the three dimensional global photo chemical model of neutral components CHARM, which was also developed in the LCAD (Krivolutsky et al, 2015). CHARM I describes a sufficiently com plete interaction of ion and neutral components of the Earth's surface up to an altitude of 90 km.…”

“…The calcu lations were based on the chemical reaction rates, absorption cross sections, and quantum yields tabu lated in (Sander et al, 2011) for the calculation of neutral components. The concentrations of chemical components at the lower boundary were specified in line with the study (Krivolutsky et al, 2015). At the upper boundary, the concentrations of long lived components at the first step were set in accordance with one dimensional model data and the concentra tions of short lived components ("family" members) were found from the photochemical equilibrium con dition.…”

“…Since the ARM general circulation model describes the complex physics of atmospheric processes in the troposphere, middle atmosphere, and lower thermosphere, new possibili ties may also appear for the description of the lower ionosphere. A more detailed description of the advec tion scheme can be found in (Krivolutsky et al, 2015).…”

Solar cycle influence on troposphere and middle atmosphere via ozone layer in the presence of planetary waves: Simulation with ARM

“…Global field of ozone, incorporated into ARM for simulations, is based on 3-D simulations with global photochemical model CHARM [Krivolutsky et al, 2015b].…”