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第四纪研究 1991
DISCUSSION ON ENVIRONMENTAL EFFECTS OF INCREASING TRACE GASES IN THE ATMOSPHERE AND ON STUDIES OF GEOLOGICAL RECORDS
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Abstract:
Since the industrial revolution,the concentration of the CO2 and other trace gases in theatmosphere has been increasing.Upon the chemical erosion of land,the influence of rise in CO2concentration is less than that of acid precipitation resulting from coal burning.Soil erosionprobably accelerates the rise in CO2 concentration;while vegetation destruction affects the fi-xation of atmospheric CO2.Although higher CO2 concentration probably promotes increase inprimary productivity,increase in rate of ocean photo-synthesis,as a process of unsteady con-dition,is disadvantageous for environmental system.Atmospheric CO2 and other trace gasesmay produce the greenhouse effect,but the corresponding relationship between increase in at-mospheric CO2 concentration and rise in the earth surfacial temperature is still not clear,butit is also needed to objectively appraise the relationship between its range and fluctuation ofnatural climate.Geological records have holographic characteristics.In order to understand the relation-ship between the concentration rise of atmospheric CO2 and other trace gases and the globalchange,it's necessary to strengthen and the geochemical research of recent geological process-es.As the fuel burning and the forest destruction are two of the most important aspects of thecontinuous influence of human activities upon natural environment,it's essential and real tobegin with environmental protection in two series of fuel and vegetation.Combined with thechinese condition and according to the global change,we suggest that the strategic policy ofenvironmental protection in China should be to unify the construction in urban-rural environ-ment.