TY - JOUR

T1 - Model study of the impact of convective processes on the gas composition of the upper troposphere and lower stratosphere

AU - Smyshlyaev, SP

AU - Zubov, VA

AU - Karol, IL

AU - Rozanov, EV

AU - Dvortsov, VL

AU - Kurzeneva, EV

PY - 2003

Y1 - 2003

N2 - A technique for incorporating the convective transport of mass into two-dimensional photochemical atmospheric models was tested. The convective mass fluxes were calculated from the three-dimensional general circulation model CCM3 and used to assess the impact of convection on the gas composition of the upper troposphere and lower stratosphere. The technique was tested using two two-dimensional photochemical models for modeling atmospheric radon distribution. The numerical experiments indicated that the convective rise of mass has a profound impact on the distribution of gases with surface sources and short atmospheric lifetimes. Studying the role of convection in the budget of hydroxyl radicals, we find that the convective rise of mass can lead to an increase in the odd-hydrogen concentration to 50% at heights between 10 and 15 kin over the equator, which is consistent with measurement data. The relationship between convective processes and the chemical activity (as well as solubility) of gases involved in convection is shown to be important.

AB - A technique for incorporating the convective transport of mass into two-dimensional photochemical atmospheric models was tested. The convective mass fluxes were calculated from the three-dimensional general circulation model CCM3 and used to assess the impact of convection on the gas composition of the upper troposphere and lower stratosphere. The technique was tested using two two-dimensional photochemical models for modeling atmospheric radon distribution. The numerical experiments indicated that the convective rise of mass has a profound impact on the distribution of gases with surface sources and short atmospheric lifetimes. Studying the role of convection in the budget of hydroxyl radicals, we find that the convective rise of mass can lead to an increase in the odd-hydrogen concentration to 50% at heights between 10 and 15 kin over the equator, which is consistent with measurement data. The relationship between convective processes and the chemical activity (as well as solubility) of gases involved in convection is shown to be important.

KW - CHEMISTRY-TRANSPORT MODEL

KW - GENERAL-CIRCULATION MODEL

KW - 2-DIMENSIONAL MODEL

KW - PARAMETERIZATION

KW - PHOTOCHEMISTRY

M3 - статья

VL - 39

SP - 432

EP - 443

JO - Izvestiya, Atmospheric and Oceanic Physics

JF - Izvestiya, Atmospheric and Oceanic Physics

SN - 0001-4338

IS - 4

ER -