辽河口湿地信息提取及蓝碳储量时空演变研究  

Information extraction and spatial and temporal evolution of blue carbon storage in wetlands of Liaohe estuary

作　　者：柯丽娜[1] 谭琴 刘大齐 王权明[2] 张广帅 KE Lina;TAN Qin;LIU Daqi;WANG Quanming;ZHANG Guangshuai(School of Geography,Liaoning Normal University,Dalian 116029,China;National Marine Environmental Monitoring Center,Dalian 116023,China)

机构地区：[1]辽宁师范大学地理科学学院,辽宁大连116029 [2]国家海洋环境监测中心,辽宁大连116023

出　　处：《辽宁师范大学学报（自然科学版）》2024年第2期213-220,共8页Journal of Liaoning Normal University:Natural Science Edition

基　　金：辽宁省自然科学基金资助项目(2021-MS-274);辽宁省社科联项目(2024lslybkt-038);国家自然科学基金资助项目(42076222;42276231;42201070);国家重点研发计划子课题(2022YFC3106101)

摘　　要：对滨海湿地的蓝碳储量与固碳能力的量化评估对减缓气候变化,充分发挥蓝碳的固碳能力,实现环境保护目标具有非常重要的现实意义.以辽河口湿地为研究对象,基于Sentinel-2A影像提取分析2017—2021年辽河口湿地信息,并借助InVEST评估模型对辽河口湿地蓝碳储量的时空变化特征进行量化评估和分析,预测研究区未来30 a蓝碳净碳固定情况.研究表明:(1)2017—2021年研究区自然湿地占比70%以上,总体呈现减少趋势;人工湿地占比20%左右,总体呈增加趋势.各湿地类型之间变化情况复杂,主要为自然湿地与人工湿地之间的相互转化.(2)2017—2021年研究区蓝碳总储量呈上升趋势,蓝碳总累积量呈下降趋势,但二者空间分布格局总体稳定,未发生剧烈变化.(3)研究区蓝碳净碳固定值在未来30 a总体呈上升趋势,到2050年蓝碳净碳固定总量可达3 094.270 7×10^(4)t,单位面积蓝碳净碳固定最大值将增至867.90 t/hm^(2),最小值将降至-63.03 t/hm^(2).In order to fully utilize blue carbon’s ability for sequestering carbon,mitigate climate change,and meet environmental protection objectives,a quantitative assessment of the storage and sequestration of blue carbon in coastal wetlands is crucial.This study used the Liaohe Estuary wetland as its research object,and it retrieved and analyzed data from Sentinel-2A images covering the wetland from2017 to 2021.Using the InVEST evaluation model,the quantitative assessment and analysis of the blue carbon storage properties in the Liaohe Estuary wetland was conducted.Based on this,a prediction was made regarding the net carbon fixation of blue carbon in the study area over the next 30 years.The findings indicated that:①Artificial wetland types occupied about 20%of the study area from2017 to 2021,with an overall growing trend;natural wetlands occupied more than 70%,with a decreasing trend overall.The interplay between natural and manmade wetland was the most intricate shift among the various forms of wetland.②From^(2)017 to 2021,the study area’s total blue carbon reserves exhibited an overall increasing trend,while the total accumulated blue carbon showed an overall lowering trend.However,the two’s geographical distribution pattern remained steady and did not drastically alter.③Throughout the next 30 years,the study area’s net carbon fixation value will primarily show an increasing trend.By 2050,the total net carbon fixation value of blue carbon is estimated to reach 3094.2707×10^(4) t,with the highest value of net carbon fixation per unit area rising to 867.90 t/hm^(2) and the lowest value falling to-63.03 t/hm^(2).

关 键 词：Sentinel-2A 辽河口湿地 信息提取 蓝碳 

分 类 号：P901[天文地球—自然地理学]