Radiative influences of Pinatubo volcanic aerosols on twilight observations of NO[sub 2] column abundances
Journal Article
·
· Geophysical Research Letters (American Geophysical Union); (United States)
- Cooperative Inst. for Research in Environmental Sciences, Boulder, CO (United States) NOAA, Aeronomy Lab., Boulder, CO (United States)
Following the massive eruption of Mt. Pinatubo during June of 1991, twilight slant column abundances of NO[sub 2] were observed to decrease by 30-40 percent at Lauder, New Zealand. In this study, it is shown that nearly all of the observed decrease in twilight NO[sub 2] slant column abundance is likely to be due to heterogeneous chemistry. Airmass factors calculated with a spherical Monte Carlo radiative transfer model are shown to be relatively insensitive to the presence of the Pinatubo volcanic aerosols above about 20 km, although some significant differences are obtained below this altitude. Changes in photolysis rates due to increased scattering are also shown to have only a small effect on the total twilight NO[sub 2] column abundances. 15 refs.
- OSTI ID:
- 6999360
- Journal Information:
- Geophysical Research Letters (American Geophysical Union); (United States), Journal Name: Geophysical Research Letters (American Geophysical Union); (United States) Vol. 19:19; ISSN GPRLAJ; ISSN 0094-8276
- Country of Publication:
- United States
- Language:
- English
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OSTI ID:35413
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·
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· Geophysical Research Letters
·
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Related Subjects
54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
ABUNDANCE
AEROSOLS
ASIA
ATMOSPHERIC CHEMISTRY
CALCULATION METHODS
CHALCOGENIDES
CHEMISTRY
COLLOIDS
DEVELOPING COUNTRIES
DISPERSIONS
ENERGY TRANSFER
FLUIDS
GASES
HEAT TRANSFER
HYDROGEN COMPOUNDS
INORGANIC ACIDS
ISLANDS
MONTE CARLO METHOD
NITRIC ACID
NITROGEN COMPOUNDS
NITROGEN DIOXIDE
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
PHILIPPINES
RADIANT HEAT TRANSFER
SOLS
VOLCANIC GASES
VOLCANOES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
ABUNDANCE
AEROSOLS
ASIA
ATMOSPHERIC CHEMISTRY
CALCULATION METHODS
CHALCOGENIDES
CHEMISTRY
COLLOIDS
DEVELOPING COUNTRIES
DISPERSIONS
ENERGY TRANSFER
FLUIDS
GASES
HEAT TRANSFER
HYDROGEN COMPOUNDS
INORGANIC ACIDS
ISLANDS
MONTE CARLO METHOD
NITRIC ACID
NITROGEN COMPOUNDS
NITROGEN DIOXIDE
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
PHILIPPINES
RADIANT HEAT TRANSFER
SOLS
VOLCANIC GASES
VOLCANOES