The sunrise and sunset variation of ClO in the lower stratosphere

Journal Article · Thu Mar 01 04:00:00 EST 1990 · Geophysical Research Letters (American Geophysical Union); (United States)

DOI:https://doi.org/10.1029/GL017i004p00509· OSTI ID:5456206

Brune, W H; Toohey, D W; Lloyd, S A; Anderson, J G ^[1]

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1. Harvard Univ., Cambridge, MA (USA)

The abundances of ClO have been measured, in situ, in the lower stratosphere during sunrise and sunset. Measurements were made with an instrument mounted on the NASA ER-2 aircraft, which was flown at an altitude of 20 km and latitudes between 35{degree}N and 47{degree}N during a morning and an evening flight. The abundances of ClO were observed over a dynamic range of 20 from a detection threshold of {approximately}1 part per trillion volume (pptv). These data confirm the sunrise variation of the photolysis of chlorine nitrate that is predicted by a zero-dimensional photochemical model. They also suggest that the absolute photolysis and termolecular formation of chlorine nitrate occur at rates consistent with nominal ClONO{sub 2} and NO{sub 2} concentrations.

• OSTI ID: 5456206
• Journal Information: Geophysical Research Letters (American Geophysical Union); (United States), Journal Name: Geophysical Research Letters (American Geophysical Union); (United States) Vol. 17:4; ISSN 0094-8276; ISSN GPRLA
• Country of Publication: United States
• Language: English

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Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
ARCTIC REGIONS
ATMOSPHERIC CHEMISTRY
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
CHLORINE COMPOUNDS
CHLORINE OXIDES
CLIMATE MODELS
DAILY VARIATIONS
DECOMPOSITION
EARTH ATMOSPHERE
ECOLOGICAL CONCENTRATION
HALOGEN COMPOUNDS
LAYERS
MATHEMATICAL MODELS
NITRATES
NITROGEN COMPOUNDS
NITROGEN DIOXIDE
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
OZONE
OZONE LAYER
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
POLAR REGIONS
RADIATIONS
SOLAR RADIATION
STELLAR RADIATION
STRATOSPHERE
SYNTHESIS
VARIATIONS