Effect of natural tetrafluoromethane
Article Abstract:
Almost 50% of the current atmospheric tetrafluoromethane (CF4) may have originated from natural radiogenic sources over a long period of time. The gas extracted from ice core from Colle Gnifetti at the Swiss/Italian border, representing the preindustrial atmosphere, contains about 39 parts/trillion by volume (p.p.t.v.) of CF4. This CF4 must have natural origin. The burnt natural gas contains about 700 p.p.t.v.. Significant traces of CF4 and SF4 are detected in fluorspar indicating that CF4 can be produced from the fluoride minerals by radiochemical process.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
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Heterogeneous production of nitrous acid on soot in polluted air masses
Article Abstract:
Spatial and temporal distribution of HNO(sub2) throughout the planetary boundary layer (PBL) is believed to be ruled by continuous formation and daytime photolysis. Polluted air masses are distinguished by high oxidized nitrogen concentrations, and the OH radical is a prominent species in the oxidation process. It is proposed that the interaction between NO(sub2) and soot particles may account for high HNO(sub2) in air masses that have combustion sources contributing to air pollution by soot and NOx emissions.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1998
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Multi-gas assessment of the Kyoto protocol
Article Abstract:
The Kyoto Protocol allows for reductions in emissions of several greenhouse gases to be credited against a CO2-equivalent emissions limited. An integrated global-systems model shows that a multi-gas control method would reduce the costs of fulfilling the Kyoto Protocol. Under a stricter emissions policy, global warming potentials would result in more mitigation of climate change for multi-gas strategies than for CO2-only control.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
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