Effects of trace gases on global atmospheric chemical and physical processes
This study examines the effects that increased emissions of anthropogenic and naturally-occurring trace gases have on the chemical and physical processes in the global atmosphere. The Lawrence Livermore National Laboratory (LLNL) one- and two-dimensional chemical radiative-transport models of the troposphere and stratosphere, are used to calculate the net effects that variations in these trace gases, either individually, or taken together have on the ozone distribution and temperature structure. Using the LLNL one-dimensional model, calculations are made that include large changes of NO{sub x}, Cl{sub 2}, and HO{sub x}. A sensitivity study is carried out using the LLNL one- and two-dimensional chemical-radiative-transport models to examine possible effects of future aircraft NO{sub x} emissions on stratospheric ozone. The emissions and atmospheric concentrations of several trace gases (N{sub 2}O, CH{sub 4}, CO{sub 2}, CFCl{sub 3}, CF{sub 2}Cl{sub 2}, CCl{sub 4}, and CH{sub 3}CCl{sub 3}), plus the effect of both the 11-year solar sunspot cycle and NO{sub x} produced from the nuclear test series of the late 1950's and early 1960's are examined. The effect of the eddy diffusion representation (K{sub yy} and K{sub zz}) on the two-dimensional transport of trace constituents is investigated, using analyzed carbon-14 and strontium-90 data from the nuclear test series in the late 1950's and early 1960's.
- Research Organization:
- California Univ., Berkeley, CA (United States)
- OSTI ID:
- 5599185
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
540111 -- Environment
Atmospheric-- Basic Studies-- Radiometric Techniques-- (1990-)
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION MONITORING
AMBIENT TEMPERATURE
ATMOSPHERIC CHEMISTRY
BOUNDARY LAYERS
CARBON 14 COMPOUNDS
CARBON COMPOUNDS
CHALCOGENIDES
CHEMISTRY
CHLORINE COMPOUNDS
EARTH ATMOSPHERE
ECOLOGICAL CONCENTRATION
ENVIRONMENTAL EFFECTS
ENVIRONMENTAL TRANSPORT
GLOBAL ASPECTS
HALOGEN COMPOUNDS
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
LAYERS
MASS TRANSFER
MATHEMATICAL MODELS
MONITORING
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
OZONE LAYER
PEROXIDES
STRATOSPHERE
TRACE AMOUNTS
TRACER TECHNIQUES
TROPOSPHERE