基于多源遥感数据的广东省次生林地上生物量影响机制及增碳潜力  

Analysis of the Impact Mechanism of Secondary Forest Aboveground Biomass and Estimation of Carbon Sink Potential in Guangdong Province

作　　者：毕崇远 李雪艳 苏泳娴[2,4] 温兴平[1] 吴建平 张超群 Chongyuan BI;Xueyan LI;Yongxian SU;Xingping WEN;Jianping WU;Chaoqun ZHANG(Faculty of Land Resource Engineering,Kunming University of Science and Technology,Kunming 650093,China;Guangzhou Institute of Geography,Guangdong Academy of Sciences,Guangzhou 510070,China;School of Atmospheric Sciences,Sun Yat-sen University,Zhuhai 519082,China;Guangzhou Institute of Geochemistry,Chinese Academy of Science,Guangzhou 510640,China)

机构地区：[1]昆明理工大学国土资源工程学院,云南昆明650093 [2]广东省科学院广州地理研究所,广东广州510070 [3]中山大学大气科学学院,广东珠海519082 [4]中国科学院广州地球化学研究所,广东广州510640

出　　处：《遥感技术与应用》2024年第5期1159-1170,共12页Remote Sensing Technology and Application

基　　金：国家自然科学基金面上项目(41971275,31971458);广东省科学院建设国内一流研究机构行动专项资金项目(2020GDASYL-20200102002),广东省科学院打造综合产业技术创新中心行动资金项目(2022GDASZH-2022010105);广东省基础与应用基础研究基金(2021A1515110215、2023A1515011996)。

摘　　要：次生林中累积的地上生物量形成的巨大碳库,对于缓解气候变化具有重要作用。广东省空间异质性显著影响着次生林的碳汇速率,但其驱动因素尚不清楚,严重制约了未来碳汇能力的准确估算和预测。基于遥感技术在时空监测方面的优势,本研究利用地上生物量、次生林种植年份及气候等高时空分辨率遥感数据,量化了四大方面驱动因素对广东省次生林地上生物量累积速度和空间模式的影响,并结合情景分析预测了广东省未来的次生林增碳潜力。结果表明:整体上,林龄是影响广东省地上生物量累积的最重要因素,然而其他影响因素的贡献则具有较强的空间异质性。在珠三角地区,气候是第二大主要驱动因素,而在粤北、粤东和粤西地区则是地形地貌。土壤元素含量的影响在四个区域普遍较小。4个情景中,在储量最大情景下至2050年可最大程度增碳62.45±2.55 Tg C。本研究可为森林可持续管理及高质量发展提供科学参考。Mitigating climate change is facilitated by the significant carbon reservoir formed through the accumulation of aboveground biomass in secondary forests.The spatial heterogeneity of Guangdong Province significantly affects the carbon sink rate of secondary forests.However,the driving factors remain unclear,which seriously constrains the accurate estimation and prediction of future carbon sink capacity.Based on the advantages of remote sensing technology in spatial and temporal monitoring,this study quantified the impacts of four major drivers on the rate of accumulation and spatial pattern of aboveground biomass in secondary forests in Guangdong Province,using high spatial and temporal resolution remote sensing data on aboveground biomass,year of planting secondary forests,and climate,and combined with scenario analyses to predict the future potential of secondary forests in Guangdong Province in terms of carbon enhancement.The results showed that,overall,stand age was the most important factor influencing aboveground biomass accumulation in Guangdong Province,however,the contributions of other influencing factors were highly spatially heterogeneous.In the Pearl River Delta(PRD)region,climate was the second most important driver,while in the northern,eastern and western regions of Guangdong,it was topography and geomorphology.The effect of soil element content is generally small in the four regions.Among the four scenarios,the maximum storage scenario could maximise carbon gain of 62.45±2.55 Tg C by 2050.This study can provide scientific reference for sustainable forest management and high-quality development.

关 键 词：高分辨率遥感 地上生物量 机制 增碳 空间异质性 

分 类 号：P942[天文地球—自然地理学]