吉林省吊水壶岩溶区碳循环研究

THE STUDIES ON CARBON CYCLE IN DIAOSHUIHU KARST REGIONS OF JILIN PROVINCE

通过对吉林省长春市吊水壶岩溶区淌泉子泉域的现场观测研究表明，岩溶作用带的碳循环强度与其相邻圈层的碳循环强度密切相关。表层带岩溶泉水的ＨＣＯ－３与上部圈层的ＣＯ２浓度呈较好的正相关关系。根据观测资料计算，本区的ＣＯ２吸收模数为０．４５８ｇ／ｓ·ｋｍ２，由此估算出北方４０万ｋｍ２的碳酸盐岩ＣＯ２吸收量为５．７７×１０１２ｇ／ａ，全球２２００万ｋｍ２的碳酸盐岩ＣＯ２吸收量为３．１８×１０１４ｇ／ａ，占全球ＣＯ２平衡中丢失总量的３．７４％。

The studies on global carbon cycle show there is a “Missing Sink” of about 8.5×10 15 g/a. Based on the observation in the spring basin of Diaoshuihu karst regions of Changchun City, Jilin Province, the quantity, quality and variation processes of CO 2 in the karst water with time and distance from the spring spot are discussed. In the region, the mean value of carbon dioxide adsorption module of karst water is 0 458 g/s·km 2. It is found that there is a close relationship between HCO - 3 content of the epikarst spring water and CO 2 content in the upper soil. According to the carbon dioxide adsorption module, the amount of carbon dioxide adsorption is calculated for the carbonate rock areas in north China and globe. The carbon dioxide adsorption quantity, in a carbonate rock area of 4.0×10 5 km 2 in north Chian, is 5 77×10 12 g/a. And the quantity, in total 2.2×10 7 km 2 of global carbonate rock area, is 3 18×10 14 g/a, which makes about 3.74 percent of the total “Missing Sink”. Therefore, karst systems play an important role in the global carbon cycle.