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Title: Some aspects of nighttime atmospheric chemistry

Journal Article · · Environ. Sci. Technol.; (United States)
DOI:https://doi.org/10.1021/es00153a013· OSTI ID:6806092

Nighttime atmospheric chemistry is simulated in two different situations: an offshore oceanic environment, the Santa Barbara Channel region of the south central coast of California, and a dry environment, the Mojave Desert of California. In the marine case, conversion of NO/sub x/ to peroxyacetyl nitrate (PAN) and HNO/sub 3/ is rapid; HNO/sub 3/ is formed by homogeneous hydrolysis of N/sub 2/O/sub 5/ and by nitrate radical reactions with organic gases, and the rate of HNO/sub 3/ production is limited by the abundance of O/sub 3/. Even in the desert case, predictions indicate that homogeneous hydrolysis of N/sub 2/O/sub 5/ dominates HNO/sub 3/ formation at night. The implications of recent studies concerning the unimolecular decomposition of NO/sub 3/ are discussed.

Research Organization:
California Institute of Technology, Pasadena
OSTI ID:
6806092
Journal Information:
Environ. Sci. Technol.; (United States), Vol. 20:11
Country of Publication:
United States
Language:
English