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Laboratory studies of sources of HONO in polluted urban atmospheres
Author(s) -
Saliba Najat A.,
Mochida Michihiro,
FinlaysonPitts Barbara. J.
Publication year - 2000
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 - 10.1029/2000gl011724
Subject(s) - troposphere , environmental science , environmental chemistry , atmosphere (unit) , atmospheric sciences , nitrous acid , adsorption , meteorology , chemistry , photochemistry , inorganic chemistry , geology , organic chemistry , physics
Laboratory studies reported here and in previous work show that the reaction of NO(g) with surface adsorbed HNO 3 may be a significant source of HONO in polluted urban atmospheres. If these laboratory studies can be extrapolated to ambient conditions, this heterogeneous reaction may generate HONO to about the same extent as the hydrolysis of NO 2 on surfaces, which is greater than the heterogeneous reaction of NO, NO 2 and water. It may also be involved in generating HONO in snowpacks, and important in reconciling the discrepancy between measured and modeled HNO 3 /NO x ratios in the troposphere.