Changes and driving forces of carbon storage in China's construction land flow from a teleconnection perspective
There is notable spatial heterogeneity in both resource distribution and economic development levels across different regions of China.As interregional trade continues to evolve,the economies of these regions become increasingly intertwined,resulting in a realignment of resource supply and demand for commodities.This economic interconnection has fostered teleconnections between regions.Concurrently,population growth has altered demand for various products and necessitated land expansion,particularly for urban development,leading to significant expansion of construction land and consequent carbon storage depletion,resulting in substantial carbon release into the atmosphere.The teleconnection effect of trade has not only intensified local demand for construction land but has also introduced external influences,impacting carbon storage levels on the land.Preserving carbon storage in land requires an analysis of changes in carbon storage within the flow of construction land and an exploration of the drivers behind these changes,followed by the formulation of pertinent policy recommendations.Utilizing land use data,carbon density data,and input-output data,this study integrates the carbon calculation module from an integrated assessment model for ecosystem services and trade-offs with a multiregional input-output model and structural decomposition analysis.Through this approach,we aim to elucidate the evolving pattern of carbon storage flow within China's construction land from 2012 to 2017,under the lens of remote correlation,identifying hotspots of carbon loss within these flux changes.Furthermore,we analyze the driving factors behind changes in carbon storage flux in construction land across each province.The results show that:(1)The interregional flows of carbon storage in construction land within China amounted to 483.3 Tg C in 2012 and increased to 580.7 Tg C by 2017.This upward trend signals a heightened frequency of regional flows and underscores the strengthening of interregional teleconnections over the study period.Notably,high-frequency flows are not confined solely to the economically developed eastern coastal regions but have progressively extended throughout the entire country.Moreover,there has been a substantial increase in flows observed in the northeast and southwest regions,regions historically trailing behind in terms of economic development.(2)During the study period,the expansion of net inflows of carbon storage on construction land in each province of China was predominantly concentrated in the central-eastern region,characterized by more robust economic development.Conversely,the augmented area of net outflows was predominantly focused in the less-developed northeastern and northwest regions.In pursuit of their own developmental and construction imperatives,the more developed regions not only appropriated the land resources of their less developed counterparts but also exacerbated the loss of carbon storage resulting from resource encroachment,thus perpetuating ecological inequality.Among these regions,Inner Mongolia emerged as the province witnessing the most substantial increase in net outflows,thus becoming a hotspot for carbon stock loss.Conversely,Zhejiang experienced the largest surge in net inflows,underscoring its pivotal role in facilitating carbon loss.(3)Consumption scale and carbon storage loading intensity of construction land are the main factors affecting the change of outflow and inflow.Provinces with a higher economic level,such as Jiangsu,show a higher increase in the scale of construction land consumption in the structural decomposition,a higher decrease in the intensity of carbon stock loading,and a higher increase in the output value per unit of construction land to meet the new external scale demand.To protect carbon storage and alleviate ecological inequality between regions,policy formulation should focus on optimizing the management mechanism of construction land,activating the value of ecological land services,and improving the ecological compensation mechanism.
万方数据
维普
