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The role of atmospheric aerosol composition in climate change

Journal of environmental sciences 1993年第2期5卷 169-175页

作者： su weihan wang shaobinresearch center for eco- environmental sciences, chinese academy of sciences beijing 100085, china

The chemical composition of atmospheric aerosols has been investigated. Contributions ofsulfate and soot in aerosols to the atmospheric extinction are studied. Discussions are made on the problems of aerosol emitted from volcano, forest fires in northern china, 1987 and oil field fires in Kuwait, 1991. It is indicated that the changes in concentration, particle size, and chemical composition of aerosol after those events could have impacts on the climate change either regionally or globally and that the impact of aerosol particles on climate change could compensate for some temperature increase caused by greenhouse gases and the increase of surface intensity of ultraviolet radiation due to ozone layer depletion.

关键词： atmospheric aerosol chemical composition climate change.

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Biologically effective radiation of solar ultraviolet radiation and the depletion of stratospheric ozone

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Journal of environmental sciences 1994年第3期6卷 373-381页

作者： wang Shaobin su weihan(Research center for eco-environmental sciences,chinese academy of sciences),beijing 100085,china) Wei Dingwen(Institute of Atmospheric Physics,chinese academy or sciences),beijing 100029,china)

Based on the biological action spectra and total UV-B radiation in the atmosphere,the effective UV-dose for DNA, erythema,and plant at different seasons in the last decade,and their future change in beijing area were *** results indicate that the maxi- mum of biologically effective radiation dose at noontime is in July and the minimum is in January. From 1980 to 1989 biologically effective radiation dose have increased with the average rates of about 0.6,0.7 and 1.1 mW/m￣2 per year for January, April and October,while in July the trend of radiation dose is not ln evidence. For 1% reduction of ozone concentration radiation amplification factor for DNA,erythema and plant are 2.3,2.3 and 1.4 and for 30% reduction of ozone concentration the RAF for DNA,erythema and plant are 4.2,4.0 and 2.1,respectively.

关键词： UV-B ozone depletion biological effects solar radiation.

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