宁夏土地利用碳排放强度时空变化与效应

贾科利; 李浩宇; 刘瑞亮; 李小雨; 杨思雨

doi:10.13961/j.cnki.stbctb.2023.05.037

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宁夏土地利用碳排放强度时空变化与效应

试验研究

- 宁夏土地利用碳排放强度时空变化与效应
- Spatial-temporal Evolution Characteristics of Land Use Carbon Emissions in Ningxia Hui Autonomous Region
- 水土保持通报 2023年43卷第5期页码：312-319
- 作者机构：
  
  宁夏大学地理科学与规划学院,宁夏,银川,750021
- 作者简介：
- 基金信息：
  
  国家自然科学基金项目“旱寒灌区土地利用与土壤盐渍化风险互馈耦合关系研究:以银川平原为例”(42061047);宁夏自然科学基金项目“土地利用视角下宁夏碳排放效应及时空演变研究”(2022AAC03119)
- DOI：10.13961/j.cnki.stbctb.2023.05.037
  中图分类号： X32;F301.2
- 纸质出版：2023
- 稿件说明：
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贾科利, 李浩宇, 刘瑞亮, 等. 宁夏土地利用碳排放强度时空变化与效应[J]. 水土保持通报, 2023,43(5):312-319.

Jia Keli, Li Haoyu, Liu Ruiliang, et al. Spatial-temporal Evolution Characteristics of Land Use Carbon Emissions in Ningxia Hui Autonomous Region[J]. Bulletin of Soiland Water Conservation, 2023, 43(5): 312-319.
贾科利, 李浩宇, 刘瑞亮, 等. 宁夏土地利用碳排放强度时空变化与效应[J]. 水土保持通报, 2023,43(5):312-319. DOI： 10.13961/j.cnki.stbctb.2023.05.037.

Jia Keli, Li Haoyu, Liu Ruiliang, et al. Spatial-temporal Evolution Characteristics of Land Use Carbon Emissions in Ningxia Hui Autonomous Region[J]. Bulletin of Soiland Water Conservation, 2023, 43(5): 312-319. DOI： 10.13961/j.cnki.stbctb.2023.05.037.

摘要

[目的

]

土地利用变化是影响碳排放和环境质量的重要驱动力之一。研究土地利用碳排放时空格局变化与效应，为制定低碳发展策略提供理论依据。[方法

]

基于灰色理论和生态承载系数，利用1980—2020年宁夏回族自治区22个县区土地利用和能源消耗数据，分析了土地利用变化与碳排放强度变化及效应。[结果

]

①碳排放变化量与土地利用变化之间具有密切的关联性。其中，建设用地与碳排放的关联度最大，为0.95。②1980—2020年宁夏土地利用类型碳排放量净增加了5.24×10

t，增幅625.43%。建设用地面积以年均4.42%的速率增长，碳排放量增幅达2 385.85%；草地面积减少了2.95×10

，碳汇量减少了5.80×10

t；林地对碳汇的贡献超过75%，且随林地面积的不断增大而增加。③1980—2020年宁夏土地利用碳排放强度以年均0.25 t/hm

的速率增大，中度及以上等级覆盖面积逐渐增大，在空间上形成沿黄城市碳排放强度高于中、南部的分布格局。④宁夏各县区碳排放生态承载系数空间差异明显，碳生态容量表现出北弱南强的分布格局。[结论

]

1980—2020年宁夏土地利用碳排放强度逐渐增大，北部沿黄河各县区碳生态容量逐渐减小，中南部县区碳生态容量增大，但减排压力较大。建议优化建设用地空间格局，增加混交林面积，增强森林碳汇能力。

Abstract

[Objective] Land use change is one of the important driving forces for increasing carbon emissions and the environmental quality. The temporal and spatial pattern changes and effects of land use carbon emissions were analyzed in order to provide a theoretical basis for the formulation of low-carbon development strategies. [Methods] The internal relationships between land use changes and carbon emissions

carbon emission intensity and ecological effect were determined based on gray theory and ecological carrying coefficient by using land use and energy consumption data for 22 counties in Ningxia Hui Autonomous Region from 1980 to 2020. [Results] ① There was a close correlation between carbon emission changes and land use changes. The correlation between construction land and carbon emissions was the largest (0.95). ② Net carbon emissions of land use types in Ningxia increased by 5.24×107 t and had a growth rate of 625.43% from 1980 to 2020. This pattern was associated with significant increases in construction land area and carbon emissions (average annual rates of 4.42% and 2385.85%

respectively) during the period of 1980—2020. Additionally

grassland area decreased by 2.95×105 hm2

and the carbon sink decreased by 5.80×104 t. Forest land was the main carbon sink

accounting for more than 75% of the carbon sink in 2020

and increased with increasing area. ③ The carbon emission intensity of land use in Ningxia increased at an average annual rate of 0.25 t/hm2 from 1980 to 2020

and the coverage area of moderate and above grades increased gradually. A spatial distribution pattern of carbon emission intensity for cities along the Yellow River developed higher than observed for the central and southern regions. ④ Due to differences in county economic level and natural environment

the spatial differences in ecological support coefficients of carbon emissions for the 22 counties in Ningxia was obvious

and the distribution pattern of carbon sink capacity was weak in the north and strong in the south. [Conclusion] The carbon emission intensity of land use in Ningxia gradually increased from 1980 to 2020. The carbon ecological capacity of counties along the Yellow River in the north gradually decreased. The carbon ecological capacity of counties in the central and southern regions increased

but the pressure of emission reduction was greater. We recommend optimizing the spatial pattern of construction land

increasing the area of mixed forests

and enhancing forest carbon sink capacity.

关键词

Keywords

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