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Impact of the heterogeneous hydrolysis of BrONO 2 on calculated ozone changes due to HSCT aircraft and increased sulphate aerosol levels
Author(s) -
Randeniya L. K.,
Vohralik P. F.,
Plumb I. C.,
Ryan K. R.,
Baughcum S. L.
Publication year - 1996
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 - 10.1029/96gl00263
Subject(s) - aerosol , ozone , hydrolysis , atmospheric sciences , saturation (graph theory) , environmental science , air quality index , isoprene , supersonic speed , meteorology , chemistry , physics , thermodynamics , organic chemistry , mathematics , combinatorics , copolymer , polymer
The heterogeneous hydrolysis of BrONO 2 via sulphate aerosols has been included in 2‐D model calculations of the impact of projected fleets of supersonic aircraft on atmospheric ozone. Calculations have been performed for aerosol levels ranging from zero to 16× the lower limit in WMO [1992]. The results show that the addition of this reaction has a major effect when the heterogeneous hydrolysis of N 2 O 5 has reached saturation in regions where the night length is short. At 4× the lower limit of aerosols, the additional calculated change in aircraft impact due to the inclusion of BrONO 2 hydrolysis is of the same order as the impact calculated when this reaction is not included. Calculations for background atmospheres at high aerosol levels show that the inclusion of this reaction significantly increases the predicted ozone depletion resulting from volcanically‐enhanced aerosol levels.