【摘要】 本文通过对中国南方岩溶区近２０００个水化学分析资料的统计分析，研究了云南、贵州、四川、广西、湖南、湖北六省（区）岩溶水ＣＯ２含量，ＣＯ２吸收模数，计算了南方碳酸盐岩出露区和分布区岩溶系统吸收ＣＯ２的数量，对全国碳酸盐岩出露区吸收的ＣＯ２作了估算，９０．７万ｋｍ２的碳酸盐岩出露面积所吸收的ＣＯ２为１４．０３×１０９ｋｇ／ａ，在碳循环平衡计算中，除了海洋吸收，大气增量以外，还有１２％被“遗漏的汇”吸收，岩溶系统吸收的ＣＯ２在这１２％中占１５％，它是全球碳循环的一个重要组成部分，是一个被“遗漏的汇”，它对大气ＣＯ２具有不可忽视的调节功能。更多还原

【Abstract】 Based on the statistical analysis of about 2000 data of chemical analysis of karst water,the carbon dioxide content and carbon dioxide absorptive module of karst water in six province,i.e.Yunnan,Guizhou,Sichuan,Guangxi,Human,Hubei,on south china are discussed and the carbon dioxide absorptive quantity in exposed areas and distributive areas of carbonate rock on south china is evaluated.According to the mean value of absorptive module in south china,the carbon dioxide absorptive quantity in exposed areas of carbonate rocks in china is calculated.In the 90.7×105 km2 exposed areas of carbonate rocks,the carbon dioxide absorptive quantity is 14.03×109 kg/a,in the balance calculating of carbonic circulate,except the ocean absorption and atmospherical increase,the absorptive quantity of “omissive sink”is 12%,in 12%,the carbon dioxide absorptive quantity in karst system makes 15%.The karst system is the important compoment part in carbonic circulate,it is a “omissive sink”and have the conditioning function not to be ignored for carbon dioxid in atmosphere.更多还原