岩溶碳汇对“碳达峰、碳中和”的意义

The significance of karst carbon sink for“carbon peak and carbon neutrality”

碳酸盐岩是地球最大的碳库,碳酸盐岩风化驱动碳循环被证实能有效降低空气中CO_(2)浓度增加。我国是岩溶大国,岩溶分布面积占国土面积的三分之一,岩溶碳汇研究取得了系列突破性成果,作为助力“碳中和”的重要途径纳入国家“双碳行动”顶层设计,然而人们对其认知较少。本文通过总结历年岩溶研究成果,从岩溶碳汇的机理、岩溶碳汇发展历程和研究进展3方面,介绍岩溶碳汇对“双碳”目标的重要意义。

Carbonate rock is the largest carbon sink on earth.Carbonate Weathering related carbon sink is listed as one of four carbon dioxide removal methods in AR5 report.Karst covers approximately 35%of the total area of China.The national carbon sink from carbonate rock weathering in new model is 0.051 Pg C/a,karst carbon sink have been included in the national“Double Carbon Actio”plan as an important way to achieve carbon neutrality.This paper introduces the concept of karst carbon sink from three aspects:the development history,controlling mechanisms and research progress of karst carbon sink in China.