摘要
大气CO_2浓度增加对陆地化学侵蚀的影响小于酸雨的影响。水土流失可能促进大气CO_2浓度的增高;植被破坏又影响大气CO_2的固定。虽然大气CO_2的较高浓度可能促成初级生产力的提高,但海洋光合作用速率增加于环境系统不利。尽管大气微量气体可能产生温室效应,但CO_2与地表升温的对应关系不清楚、增温幅度与自然脉动的关系尚需客观评定。地质记录具全息性特征。加强地质记录和现代地质过程研究是揭示大气微量气体环境效应之谜的关键;从燃料和植被两个系列着手是维护全球环境的重要途径。
Since the industrial revolution,the concentration of the CO_2 and other trace gases in theatmosphere has been increasing.Upon the chemical erosion of land,the influence of rise in CO_2concentration is less than that of acid precipitation resulting from coal burning.Soil erosionprobably accelerates the rise in CO_2 concentration;while vegetation destruction affects the fi-xation of atmospheric CO_2.Although higher CO_2 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 CO_2 and other trace gasesmay produce the greenhouse effect,but the corresponding relationship between increase in at-mospheric CO_2 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 CO_2 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.
出处
《第四纪研究》
CAS
CSCD
1991年第2期158-164,共7页
Quaternary Sciences
基金
国家自然科学基金
