Anthropogenic influence on the distribution of tropospheric sulphate aerosol
Article Abstract:
Sulfate aerosols scatter sunlight and provide nucleation sites for the formation of clouds, affecting the climate. Industrial activity has increased the overall emissions of sulfates into the atmosphere threefold over the last hundred years. Concentrations of sulfate aerosols over northern Europe reach 100 times the pre-industrial level during winter, but only about six percent of anthropogenic sulphur emissions result in new aerosol particles. The rest is deposited on the Earth or becomes attached to particles already present in clouds.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1992
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High concentrations and photochemical fate of oxygenated hydrocarbons in the global troposphere
Article Abstract:
Acetone regulates the concentration of peroxyacetylnitrate (PAN) in the troposphere, and its influence is more severe in the middle and upper troposphere. In the middle and upper troposphere photolysis of acetone is high and PAN is stable. Acetone facilitates a suitable pathway in aggregating NO(sub x) and HO(sub x) radicals in the form of PAN. A three dimensional model of the atmosphere is prepared to analyze the influence of acetone in PAN formation, by combining acetone and C1-C3 hydrocarbon chemistry.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
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Quantification of dust-forced heating of the lower troposphere
Article Abstract:
An indirect measure of the tropospheric temperature response is presented, based on 'errors' in the NASA/Goddard model/data-assimilation system. The errors provide data about physical processes missing from the predictive model and their monthly mean patterns are strikingly similar to observed dust patterns over the eastern tropical North Atlantic Ocean. The similarities suggest that dust aerosols are a significant source of inaccuracies in numerical weather-prediction models in the region.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1998
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