摘要
【目的】从土地利用视角,分别对2010年和2020年陕西省县域碳源与碳汇规模进行测算,揭示碳中和状态的时空变化格局。【方法】耕地和建设用地碳排放采用农业生产过程中产生的碳排放和能源碳排放系数进行估算,耕地碳汇采用农作物经济系数和碳吸收率来计算,林地、草地和湿地碳汇依据《生态产品总值核算规范(试行)》,采用固碳速率法进行估算。【结果】近十年陕西省耕地和建设用地碳排放分别增加67489 t和36473909 t,县域平均增长分别为631 t和340878 t;陕西省碳汇共增加3204196 t,县域平均增长29946 t,其中,耕地和湿地的碳汇总量分别增加了3287178 t和8494 t,林地和草地的碳汇总量分别减少了91028 t和442 t;空间分布上,耕地碳排放主要分布在关中地区的渭南和咸阳等地,建设用地碳排放相对集中在陕北的榆林,耕地碳汇与碳排放分布格局大体一致,林地碳汇主要在陕南秦岭山区,草地和湿地则集中在陕北长城沿线风沙区;2010年陕西省碳亏规模为3330 t,2020年达33340497 t,碳亏县域从2010年的34个增长至2020年的47个。【结论】2010年陕西省碳源与碳汇基本持平,达到“碳中和”状态。随着近十年社会经济的发展,尤其是陕北榆林资源型经济和能源化工等相关产业的快速发展,关中地区人口与产业的集聚和增长,省域总体能源结构并未明显改善,陕西省整体处于明显碳亏状态,“碳中和”任重而道远。
【Objective】From the perspective of land use,this paper calculates the size of carbon source and carbon sink in Shaanxi Province in 2010 and 2020 respectively,and reveals the spatio-temporal pattern evolution of carbon neutrality.【Method】The carbon emission of cropland and building land is estimated by the carbon emission of agricultural production and the energy emission factor.The carbon sink of cultivated land is calculated using the crop economic coefficient and carbon sequestration rate.The calculation of for⁃est,grassland and wetland carbon sinks is based on the carbon sequestration rate method in according with the‘Accounting standard for total value of ecological products(Trial)’.【Result】In this decade,the carbon emissions from cropland and construction land in Shaanxi Province increased by 67489 t and 36473909 t,respectively,and the average increase in the counties was 631 t and 340878 t.The total amount of carbon sinks in the province increased by 3204196 t,and the average increase in the county was 29946 t.Of these,cropland and wetland carbon sinks increased by 3287178 t and 8494 t,respectively,and forest and grass⁃land carbon sinks decreased by 91028 t and 442 t.Among them,cultivated land and wetland carbon sinks in⁃creased by 3287178 t and 8494 t,respectively,and forest land and grassland carbon sinks decreased by 91028 t and 442 t.In terms of spatial distribution,cultivated land carbon emission is mainly distributed in Weinan and Xianyang city in Guanzhong plain,and construction land carbon emission is relatively concen⁃trated in Yulin city in northern Shaanxi.The distribution pattern of cultivated land carbon sink and carbon emission is generally consistent.The forest carbon sink is mainly concentrated in the Qinling Mountains in southern Shaanxi,and the grassland and wetland carbon sink is concentrated in the wind-borne sand region along the Great Wall in northern Shaanxi.The size of the carbon deficit in Shaanxi Province was 3330 tonnes in 2010 and 33340497 tonnes in 2020.The number of carbon deficit counties increased from 34 in 2010 to 47 in 2020.【Conclusion】In 2010,the carbon source and carbon sink of Shaanxi Province were basi⁃cally equal,reaching a state of carbon neutrality.However,social and economic development over the past decade has resulted in a significant carbon deficit in Shaanxi Province as a whole.In particular,the rapid de⁃velopment of the resource-based economy and the energy and chemical industries in Yulin,northern Shaanxi,the agglomeration and growth of population and industry in the Guanzhong area,and the overall en⁃ergy structure of the province have not been significantly improved.Therefore,there is still a long way to go to maintain′carbon neutrality′in the long term.
作者
黄馨
韩玲
HUANG Xin;HAN Ling(School of Land Engineering,Chang′an University,Shaanxi Key Laboratory of Land Consolidation,Xi′an 710054,China)
出处
《甘肃农业大学学报》
北大核心
2025年第1期269-280,共12页
Journal of Gansu Agricultural University
基金
陕西省重点研发项目(2022ZDLSF07-05)
中央高校基本科研业务费专项资金项目(300102352203)
陕西省创新能力支撑计划(2024ZC-YBXM-053)。
关键词
土地利用
碳源
碳汇
碳中和
陕西省
land use
carbon source
carbon sink
carbon neutral
Shaanxi Province
