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Role of nitrogen oxides in the stratosphere: A reevaluation based on laboratory studies
Author(s) -
Portmann Robert W.,
Brown Steven S.,
Gierczak Tomasz,
Talukdar Ranajit K.,
Burkholder James B.,
Ravishankara A. R.
Publication year - 1999
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 - 10.1029/1999gl900499
Subject(s) - stratosphere , altitude (triangle) , halogen , nitrogen , abundance (ecology) , atmospheric sciences , middle latitudes , latitude , reaction rate constant , nitrogen oxides , environmental chemistry , catalysis , chemistry , analytical chemistry (journal) , environmental science , kinetics , geology , physics , ecology , mathematics , biology , organic chemistry , engineering , waste management , biochemistry , alkyl , geometry , geodesy , quantum mechanics
The changes in chemical partitioning and stratospheric O 3 abundance due to the recently measured rate coefficients for the O + NO 2 , OH + HNO 3 , and OH + NO 2 reactions are examined using a two‐dimensional model. The rate constant changes increase NO x abundance (up to 40%) and NO x ‐catalyzed O 3 destruction, and extend down by several kilometers the altitude region where NO x dominates catalytic O 3 destruction. Reductions in the abundance of HO x (10–30%) and ClO x (20‐40–) in the lower stratosphere partially buffer the effect on column O 3 amount. Column O 3 at middle and high latitudes is reduced by 2–10% depending on season for current halogen levels. The model derived long‐term O 3 trend at midlatitudes due to increases in anthropogenic halogens is reduced by approximately 30%.
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