本文从湿地碳汇的科学基础出发，综述了湿地碳汇估算的基本方法，即库差法和益损法，以及它们在使用中需要注意的问题。同时，还基于对湿地碳汇的科学认识，分析了湿地碳汇可持续利用的主要研究方向与政策基础。本文认为，降低湿地植物的分解和适宜的还湿、湿地恢复等保育管理是湿地保持并扩大其持续碳汇力的基本方向。我国已将湿地碳汇能力巩固提升作为碳达峰行动方案的重要部分，但如何将湿地碳汇纳入自愿减排市场或抵扣强制减排量，仍需制定可执行的政策与规范。
On the scientific basis，the carbon sink estimation of wetland was summarized up，that is stock-difference method and gain-loss method as a fundamental approaches. The major issues when those methods were applied in that estimation had been raised up for attention be paid. Based on the science achievements，the research approaches and policy foundation for market trading about the wetland carbon sink had been analyzed for that sink sustainability. It was concluded that the decomposition reduction of wetland plant material and rewetting and suitable restoration of wetland are essential for its sink conserving. Nowadays，China has already set the wetland conservation for its carbon sink sustainability as a part of the national goal in the carbon peaking road-map，the further elaboration on the policymaking should be taken for the wetland sink conclusive into the voluntary market and as an offset of the part compulsory reduction of emission.
