Modeling the formation of polar stratospheric clouds with allowance for kinetic and heterogeneous processes

A new mathematical model of global transport of multicomponent gaseous admixtures and aerosols in the atmosphere and the formation of polar stratospheric clouds (PSC) in both hemispheres has been constructed. Two types of PSCs are considered: type Ia, nitric acid trihydrate (NAT), and type Ib, super...

Full description

Saved in:
Bibliographic Details
Published in:Izvestiya. Atmospheric and oceanic physics 2015-05, Vol.51 (3), p.241-250
Main Authors: Aloyan, A. E., Yermakov, A. N., Arutyunyan, V. O.
Format: Article
Language:English
Subjects:
Aerosols
Atmosphere
Climatology
Clouds
Earth and Environmental Science
Earth Sciences
Evaporation
Geophysics/Geodesy
Kinetics
Mathematical models
Nitric acid
Photochemistry
Stratosphere
Sulfates
Troposphere
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A new mathematical model of global transport of multicomponent gaseous admixtures and aerosols in the atmosphere and the formation of polar stratospheric clouds (PSC) in both hemispheres has been constructed. Two types of PSCs are considered: type Ia, nitric acid trihydrate (NAT), and type Ib, supercooled ternary solutions of H 2 SO 4 /HNO 3 /H 2 O (STS). New equations are used to describe the variation in gas- and condensed-phase components on the basis of their thermodynamic properties. The formation of PSCs is coupled with sulfate aerosols generated in the upper troposphere and lower stratosphere, and with chemical and kinetic transformation processes (photochemistry, nucleation, condensation/evaporation, and coagulation). Using this coupled model, numerical experiments were performed to reproduce the spatial and temporal variability of PSCs in winter in both hemispheres. First, the formation of primary sulfate aerosols in the atmosphere is considered and then these aerosols are incorporated to the PSC model. The results of the numerical experiments are analyzed.
ISSN:0001-4338
1555-628X
DOI:10.1134/S0001433815030020