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An analytic expression for the composition of aqueous HNO 3 ‐H 2 SO 4 stratospheric aerosols including gas phase removal of HNO 3
Author(s) -
Carslaw Kenneth S.,
Luo Beiping,
Peter Thomas
Publication year - 1995
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/95gl01668
Subject(s) - aerosol , volume (thermodynamics) , stratosphere , atmospheric composition , gas composition , analytical chemistry (journal) , computation , phase (matter) , aqueous solution , gas phase , thermodynamics , chemistry , environmental science , materials science , atmospheric sciences , environmental chemistry , physics , meteorology , atmosphere (unit) , mathematics , organic chemistry , algorithm
An analytic expression is given for the composition and volume of stratospheric HNO 3 ‐H 2 SO 4 ‐H 2 O aerosols in terms of the temperature and total amounts of H 2 O, HNO 3 and H 2 SO 4 , taking into account conservation of HNO 3 . In contrast to previous parameterisations of equilibrium vapour pressures, the present scheme for calculating the aerosol composition does not require an iteration procedure, thus computation times are significantly reduced, making it ideal for inclusion in large‐scale atmospheric models. Calculated compositions are compared with the results of a comprehensive thermodynamic model for all stratospheric conditions and maximum deviations are presented.