二氧化碳研究中的若干问题

SOME PROBLEMS IN CO_2 STUDYING

二氧化碳及其它痕迹气体具有一定的增温低层大气的“温室效应”。在地质年代中,二氧化碳在大气中的含量就有较明显的变化,近期二氧化碳浓度的升高可能与人类大量使用化石燃料和破坏植被有关。这对不全面的预测气候和环境变化已产生广泛的社会影响,而二氧化碳对植物生产量的有机化学效应却未受到应有的重视。在“天—地—生”系统和“海—气—冰雪”系统中,二氧化碳只是影响气候变化的一个很弱的因子。近百年来的二氧化碳浓度变化,更多地取决于自然的变化而非人类活动;海洋是一个巨大的碳储存库,海—气交换影响着二氧化碳浓度的变化。

Carbon dioxide(CO_2)and many other trace gases have a greenhouse effect to warm the lower atmosphere.In geologic ages,the CO_2 concentration fluctuated obviously.It would be true that there was a relationship between the recent CO_2 concentration in- creasing fasfly and human using fossil fuels and destroying the vegetation.The un-overal predict about the climatic and environmental changing almost makes a wide influence, and it is ignored that CO_2 has a great organic chemistrial effect on the plants.Maybe it will give us more. In the Astronomy-Geography-Biosphere system'and'the Ocean-Atomosphere-Ice and Snow system',CO_2 influences the climate weekly,at least,it has not done so visually till now.The temperature getting higher in the past centuries was mostly natural,and not by the human being. The carbon exchange between the ocean containing a great deal of carbon and the air critically controls the CO_2 concentration change.