GLOMAC
Global Modelling of Atmospheric Chemistry
Completed
| Type of Structure: |
coordinated project |
| Regional Scope: |
continental
in the area: Europe
|
| Parent Organisations: |
EUROTRAC.EUREKA |
| Child Organisations: |
|
| Duration : |
1990 to 1995 COMPLETED |
| Contact Address: |
no office contact defined |
General information and objectives
Scientific aims:
To develop a three dimensional model of the global troposphere for simulating the transport and transformation of trace constituents. To use the model to answer questions concerning the sources and sinks of tropospheric ozone and its precursors; the influence of anthropogenic processes on composition and climate; and the long-range transport of sulfur compounds and other acidifying substances.
Changes in the global atmosphere
The global model computations in GLOMAC indicate that: there is a major rise, perhaps up to a factor of three, in the ozone concentration in the lower troposphere in the northern hemisphere from the pre-industrial to the industrial period due to growing emissions of methane, carbon monoxide and nitrogen oxides; there is a very large increase in sulfate concentrations due to industrial emissions especially over and downwind of the polluted continents in the northern hemisphere, which may be so great that their negative radiative forcing could substantially compensate for the increased greenhouse warming caused by carbon dioxide, methane, ozone and other gases; heterogeneous reactions on cloud and aerosol particles are of importance in removing tropospheric nitrogen oxides; the observed rises in the concentrations of carbon monoxide and methane may cause a reduction in the concentration of the OH free radical, the main oxidising agent for most pollutants, so that the self-cleaning capacity of the atmosphere would be reduced.
Last update: 4/27/22
Source of data: ProClim- Research InfoSystem (1993-2024)
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