浙江省贝藻海水养殖碳汇能力及经济价值评估

Assessment of Carbon Sink Capacity and Economic Value of Shellfish and Algae Mariculture in Zhejiang Province

中国是海水养殖大国,在全球气候变化加剧的背景下,充分利用贝藻海水养殖高效的碳汇功能是实现中国“双碳”目标的重要途径。为评估浙江省贝藻海水养殖的固碳潜力,根据近10年(2011—2020年)浙江省贝藻海水养殖的产量数据,计算了浙江省沿海城市贝藻海水养殖的碳汇量及其经济价值。结果表明,浙江省贝藻的年平均碳汇量分别为7.88×10^(4)t和4.3×10^(3)t,相当于每年减排3.05×10^(5)t的CO_(2),节约减排成本约2887万元。建议浙江省通过增加贝藻养殖规模、优化产业结构、完善碳汇交易体系等方面实现近海碳汇效率的提升。

China is the largest mariculture country around the world.Under the background of global climate change,making full use of the efficient carbon sink function of shellfish and algae mariculture is an important way to achieve the goal of"Double Carbon".To evaluate the carbon sink potential of shellfish and algae mariculture,carbon sink and economic value of shellfish and algae mariculture in coast of Zhejiang Province were calculated based on the yield data in recent ten years(from 2011 to 2020).The results showed that the average annual carbon sink of shellfish and algae in Zhejiang Province was 78800 t and 4300 t,respectively,which was equivalent to the annual emission reduction of 305000 t of carbon dioxide,and the cost of emission reduction was 28.87 million yuan.Zhejiang Province should improve the efficiency of offshore carbon sink by increasing the scale of shellfish and algae cultivation,optimizing the industrial structure and improving the carbon sink trading system.