Simulations of greenhouse trace gases using the Los Alamos chemical tracer model [electronic resource].

Published:: Washington, D.C. : United States. Dept. of Energy, 1991.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: Pages: (26 pages) : digital, PDF file
Additional Creators:: Los Alamos National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

Through three-dimensional global model studies on atmospheric composition and transport, we are improving our quantitative understanding of the origins and behavior of trace gases that affect Earth's radiative energy balance and climate. We will focus, in this paper, on the simulations of three individual trace gases including CFC-11, methyl chloroform, and methane. We first used our chemical tracer model to study the global distribution and trend of chemically inert CFC-11 observed by the Atmospheric Lifetime Experiment. The results show that the model has the ability to reproduce the time-series of the observations. The purpose of this CFC-11 simulation was to test the transport of the model. We then used to model introduce methyl chloroform into the atmosphere according to the known emission patterns and iteratively varied OH fields so that the observed concentrations of methyl chloroform from the observations could be simulated well. The rationale behind this approach is that the reaction with OH is the dominant sink for metyl chloroform and the transport of the model has been tested in the previous CFC-11 study. Finally, using the inferred OH distributions, we conducted a steady-state simulation to reproduce the current methane distribution. The general agreement between the modeled an observed methane surface concentrations has laid a foundation for the simulation of the transient increase of methane.

Report Numbers:

E 1.99:la-ur-91-4049
E 1.99: conf-9110127--2
conf-9110127--2
la-ur-91-4049

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Note:

Published through SciTech Connect.
11/01/1991.
"la-ur-91-4049"
" conf-9110127--2"
"DE92005055"
Conference on global climate change: its mitigation through improved production and utilization of energy, Los Alamos, NM (United States), 21-24 Oct 1991.
Kao, C.Y.J.; Tie, X.; Morz, E.

Funding Information:

W-7405-ENG-36

View MARC record | catkey: 14148152