Heterogeneous chemistry of NO{sub 3} in clouds and fogs

Conference · Tue Oct 01 04:00:00 EDT 1996

OSTI ID:369995

Rudich, Y; Talukdar, R K; Fox, R ^[1]

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1. NOAA, Aeronomy Lab., Boulder (United States); and others

The heterogeneous reactions of the nitrate free radical (NO{sub 3}) an important nighttime oxidant in the lower troposphere, in clouds and fogs are unexplored. Therefore, the uptake coefficients ({gamma}) of NO{sub 3} onto pure water and other dilute solutions were measured. The product of Henry`s law constant, H, and diffusion coefficient D{sub {ell}}, for NO{sub 3} in water was calculated to be H{radical}D{sub {ell}} = (1.9{plus_minus}0.2)x10{sup -3} M atm{sup -1} cm s-{sup 1/2} and H , was determined to be 0.6{plus_minus}0.3 M atm{sup -1}. Uptake of NO{sub 3} on pure water is interpreted as due to reaction of NO{sub 3(aq)} with H{sub 2}O{sub ({ell})} to produce HNO{sub 3} and OH in the liquid phase. Details of these measurements and the implications of these findings to the chemistry of NO{sub 3} in the troposphere will discussed.

• OSTI ID: 369995
• Report Number(s): CONF-960376--
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
ATMOSPHERIC CHEMISTRY
CLOUDS
DIFFUSION
HYDROXYL RADICALS
NITRATES
NITRIC ACID
OXIDIZERS
POLLUTANTS
TROPOSPHERE
WATER