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Multi-scenario Simulation for 2060 and Driving Factors of the Eco-spatial carbon sink in the Beibu Gulf Urban Agglomeration, China

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Chinese Geographical Science 2023年第1期33卷 85-101页

作者： QIN Menglin ZHAO Yincheng LIU Yuting JIANG Hongbo LI Hang ZHU Ziming School of Civil Engineering and Architecture Guangxi UniversityNanning 530004China College of Forestry Guangxi UniversityNanning 530004China Earth&Environmental Systems Science Department Indiana State UniversityTerre Haute 47807U.S

Since China announced its goal of becoming carbon-neutral by 2060, carbon neutrality has become a major target in the development of China's urban agglomerations. This study applied the Future Land Use Simulation(FLUS) model to predict the land use pattern of the ecological space of the Beibu Gulf urban agglomeration, in 2060 under ecological priority, agricultural priority and urbanized priority scenarios. The Integrated Valuation of Ecosystem Services and Trade-offs(In VEST) model was employed to analyse the spatial changes in ecological space carbon storage in each scenario from 2020 to 2060. Then, this study used a Geographically Weighted Regression(GWR) model to determine the main driving factors that influence the changes in land carbon sinking capacity. The results of the study can be summarised as follows: firstly, the agricultural and ecological priority scenarios will achieve balanced urban expansion and environmental protection of resources in an ecological space. The urbanized priority scenario will reduce the carbon sinking capacity. Among the simulation scenarios for 2060, carbon storage in the urbanized priority scenario will decrease by 112.26 × 10^(6) t compared with that for 2020 and the average carbon density will decrease by 0.96 kg/m^(2) compared with that for 2020. carbon storage in the agricultural priority scenario will increase by 84.11 × 10^(6) t, and the average carbon density will decrease by 0.72 kg/m^(2). carbon storage in the ecological priority scenario will increase by 3.03 × 10^(6) t, and the average carbon density will increase by 0.03 kg/m^(2). Under the premise that the population of the town will increases continuously, the ecological priority development approach may be a wise ***, slope, distance to river and elevation are the most important factors that influence the carbon sink pattern of the ecological space in the Beibu Gulf urban agglomeration, followed by GDP, population density, slope direction and distance

关键词： Integrated Valuation of Ecosystem Services and Trade-offs(InVEST)model carbon sink multi-scenario simulation ecological space driving factor Beibu Gulf urban agglomeration

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Division of carbon sink functional areas and path to carbon neutrality in coal mines

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International Journal of Coal Science & Technology 2022年第4期9卷 203-213页

作者： Boyu Yang Zhongke Bai Shuai Fu Yingui Cao School of Land Science and Technology China University of Geosciences(Beijing)100083 BeijingChina Key Laboratory of Land Consolidation of Ministry of Natural Resources 100035 BeijingChina Technology Innovation Center of Ecological Restoration Engineering in Mining Area Ministry of Natural Resources100083 BeijingChina

Remote sensing image data of typical mining areas in the Loess Plateau from 1986 to 2018 were used to analyze the evolution of land use,explore the division of carbon sink functional areas,and propose carbon neutrality paths to provide a reference for the coal industry carbon peak,carbon-neutral action *** show that(1)land use has changed signifcantly in the Pingshuo mining area over the past 30 *** land in industrial,opencast,stripping,and dumping areas comprises 4482.5 ha of cultivated land,1648.13 ha of grassland,and 963.49 ha of forestland.(2)The carbon sink functional areas of the Pingshuo mining land is divided into invariant,enhancement,low carbon optimization,and carbon emission control *** proportion of carbon sinks in the invariant area is decreasing,whereas the proportion in enhancement,low carbon optimization,and carbon emission control areas is gradually increasing.(3)The carbon neutrality of the mining area must be reduced from the entire process of stripping–mining–transport–disposal–reclamation,and carbon emissions and carbon sink accounting must start from the life cycle of coal ***,carbon neutrality in mining areas must follow the 5R principles of reduction,reuse,recycling,redevelopment,and restoration,and attention must be paid to the potential of carbon sinks in ecological protection and restoration projects in the future.

关键词： Land use Pingshuo mining area carbon neutrality Functional area carbon sink

Country-level land carbon sink and its causing components by the middle of the twenty-first century

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Ecological Processes 2021年第1期10卷 840-852页

作者： Lifen Jiang Junyi Liang Xingjie Lu Enqing Hou Forrest MHoffman Yiqi Luo Center for Ecosystem Science and Society Northern Arizona UniversityFlagstaffAZ 86011USA. College of Grassland Science and Technology China Agricultural UniversityBeijing 100083China. School of Atmospheric Sciences Sun Yat-sen UniversityGuangzhou 510275GuangdongChina. Computational Sciences&Engineering Division and Climate Change Science Institute Oak Ridge National LaboratoryOak RidgeTN 37831USA. Department of Biological Sciences Northern Arizona UniversityFlagstaffAZ 86011USA.

Background:Countries have long been making efforts by reducing greenhouse-gas emissions to mitigate climate *** the agreements of the United Nations Framework Convention on Climate Change,involved countries have committed to reduction ***,carbon(C)sink and its involving processes by natural ecosystems remain difficult to ***:Using a transient traceability framework,we estimated country-level land C sink and its causing components by 2050 simulated by 12 Earth System Models involved in the Coupled Model Intercomparison Project Phase 5(CMIP5)under ***:The top 20 countries with highest C sink have the potential to sequester 62 Pg C in total,among which,Russia,Canada,USA,China,and Brazil sequester the *** C sink consists of four components:productiondriven change,turnover-driven change,change in instantaneous C storage potential,and interaction between production-driven change and turnover-driven *** four components account for 49.5%,28.1%,14.5%,and 7.9%of the land C sink,***:The model-based estimates highlight that land C sink potentially offsets a substantial proportion of greenhouse-gas emissions,especially for countries where net primary production(NPP)likely increases substantially and inherent residence time elongates.

关键词： carbon sink carbon storage Earth system models Net primary productivity Residence time Terrestrial ecosystems

Bicarbonate Daily Variations in a Karst River:the carbon sink Effect of Subaquatic Vegetation Photosynthesis

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Acta Geologica Sinica(English Edition) 2012年第4期86卷 973-979页

作者： ZHANG Cheng WANG Jinliang PU Junbing YAN Jun Institute of Karst Geology Chinese Academy of Geological Sciences Karst Dynamics Laboratory Ministry of Land and Resources International Research Center on Karst Under the Auspices of UNESCO Department of Geography and Geology Western Kentucky University

Using the Guancun River, an underground stream-fed river, in Rong＇an County of Guangxi, China as a case study, the daily biochemical cycle was examined in this paper based on the data collected a weeklong via high resolution data logger monitoring and high-frequency sampling. Furthermore, the loss of inorganic carbon along its flow path was estimated. Results show that chemical components of the groundwater input are quite stable, showing little change extent; while all of the chemical parameters from two downstream monitoring stations show diel variation over the monitoring period, suggesting that plant activity in the river has a strong influence on water chemistry of the river. The comparison of the input fluxes from the groundwater with the output fluxes of HCO~ estimated at the downstream monitoring station during the high-frequency sampling period shows a strong decrease of HCO~, indicating that the river is losing inorganic carbon along its flow path. The loss is estimated to be about 1,152 mmol/day/m of HCO~ which represent about 94.9 kg/day of inorganic carbon along the 1,350 m section of the Guancun River. It means that HCO~ entering the river from karst underground stream was either consumed by plants or trapped in the authigenic calcite and thus constitutes a natural sink of carbon for the Guancun karst system.

关键词： Diel cycle carbon isotope photosynthetic process subaquatic vegetation karst river carbon sink

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Incorporating carbon sink of harvested wood products into ecological footprint accounting:model and case study

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Ecosystem Health and Sustainability 2020年第1期6卷 451-460,450页

作者： Wei Gao Guowei Cheng Chang’e Liu School of Ecology and Environmental Sciences Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded EnvironmentsYunnan UniversityKunmingChina

Ecological footprint(EF)accounting system is widely used in assessing environmental sustainability at various spatial *** improve the EF performance,a new EF calculation framework was established in this study,in which HWP is considered as carbon sinks and the model was then applied to the Yangtze River basin of *** showed that(1)carbon sink in the basin is about 2.99 Tg per year and it varies substantially across subbasins,which has a nonlinear relationship with net primary productivity;(2)available biocapacity calculated in the whole basin increases from 0.5068 to 0.5759 national ha(nha)per capita when incorporating the carbon *** a few subbasins,the added biocapacity is even larger than the biocapacity estimated from the conventional approach;(3)the EF of the basin is 5.598 nha per capita and it is much larger than its biological carrying capacity(BC),indicating that ecological deficit is ubiquitous across the *** carbon sinks are considered,the ecological deficit would decrease by 3.2–14.3%for different regions in the *** is necessary to incorporate HWP and other potential terrestrial carbon sinks in the EF accounting,and more efforts are needed in improving carbon sink accuracy.

关键词： carbon sink net primary productivity(NPP) sustainability ecological footprint harvested wood products(HWP)

A carbon-neutrality-capactiy index for evaluating carbon sink contributions

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Environmental Science and Ecotechnology 2023年第3期15卷 54-65页

作者： Xiaoyong Bai Sirui Zhang Chaojun Li Lian Xiong Fengjiao Song Chaochao Du Minghui Li Qing Luo Yingying Xue Shijie Wang State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang550081China School of Geography and Environmental Sciences Guizhou Normal UniversityGuiyang550001Guizhou ProvinceChina CAS Center for Excellence in Quaternary Science and Global Change Xi'an710061ShaanxiProvinceChina

The accurate determination of the carbon-neutrality capacity(CNC)of a region is crucial for developing policies related to emissions and climate ***,a systematic diagnostic method for determining the CNC that considers the rock chemical weathering carbon sink(RCS)is ***,it is challenging but indispensable to establish a fast and practical index model to determine the ***,we selected Guizhou as the study area,used the methods for different types of carbon sinks,and constructed a CNC index(CNCI)*** found that:(1)the carbonate rock chemical weathering carbon sink flux was 30.3 t CO_(2)km^(-2)yr^(-1).Guizhou accounted for 1.8%of the land area and contributed 5.4%of the carbonate chemical weathering carbon sink;(2)the silicate rock chemical weathering carbon sink and its flux were 1.44×10^(3)t CO_(2)and 2.43 t CO_(2)km^(-2)yr^(-1),respectively;(3)the vegetation-soil ecosystem carbon sink and its flux were 1.37×10^(8)t CO_(2)and 831.70 t CO_(2)km^(-2)yr^(-1),respectively;(4)the carbon emissions(CEs)were 280 Tg CO_(2),about 2.8%of the total for China;and(5)the total carbon sinks in Guizhou were 160 Tg CO_(2),with a CNCI of 57%,which is 4.8 times of China and 2.1 times of the *** summary,we conducted a systematic diagnosis of the CNC considering the RCS and established a CNCI *** results of this study have a strong implication and significance for national and global CNC determination and gap analysis.

关键词： carbon neutrality carbon sink carbon source Rock chemical weathering carbon budget

Resolving controversies surrounding carbon sinks from carbonate weathering

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Science China Earth Sciences 2024年第9期67卷 2705-2717页

作者： Xiaoyong BAI Sirui ZHANG Pete SMITH Chaojun LI Lian XIONG Chaochao DU Yingying XUE Zilin LI Mingkang LONG Minghui LI Xiaoyun ZHANG Shu YANG Qing LUO Xiaoqian SHEN State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of Sciences College of Resources and Environmental Engineering Guizhou University CAS Center for Excellence in Quaternary Science and Global Change University of Chinese Academy of Sciences Institute of Biological and Environmental Sciences University of Aberdeen School of Geography and Environmental Sciences Guizhou Normal University

The importance of carbonate weathering carbon sinks(CCSs) is almost equal to that of vegetation photosynthesis in the global carbon cycle. However, CCSs have become controversial in formulating carbon neutral policies to deal with global climate problems in various countries, since the carbonate dissolution is reversible. In order to address these controversies, we reviewed recent advances in understanding CCSs and examined the outstanding controversies surrounding them. We have analyzed the five controversies, revealing the existence of CCSs, quantifying their magnitude, clarifying their spatiotemporal pattern, and documenting how they have increased and how they evolved under the background of global change. By addressing these five controversies, we help to bring clarity to the role of CCSs in the carbon cycle of global terrestrial ecosystems.

关键词： carbon sink carbonate weathering carbon cycle Climate change Anthropogenic driver

Survey on the Policy Evolution of China s Marine carbon sink and carbon Trading Market

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Meteorological and Environmental Research 2023年第4期14卷 46-49页

作者： Jinghui YANG CNPC Research Institute of Safety&Environment Technology Beijing 102206China

Climate change is currently the biggest environmental challenge facing sustainable development in human society,and it is an inherent requirement for achieving sustainable development by actively addressing climate *** the increasingly strict constraints of climate governance,developed countries such as the United States,European Union countries,and Japan have responded and actively formulated low-carbon development goals and policy measures that are in line with their national *** policies mainly involve various fields such as low-carbon technology,energy conservation and emission reduction,and circular development,with clear policy *** this paper,the evolution of policies on marine carbon sink and carbon trading in China is summarized,providing support for better understanding the background of formulating relevant international and domestic policies.

关键词： carbon sink carbon trade Ocean Policy investigation

Responses of carbon sink of Ecosystem Vegetation to Land Use Changes in Kunming City

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Asian Agricultural Research 2023年第5期15卷 17-23页

作者： Bozhou GONG Haiying PENG Xinyou LIU Research Institute of Land Resource and Sustainable Development Yunnan University of Finance and EconomicsKunming 650221China Central Yunnan Water Diversion Project Construction Administration Bureau of Yunnan Province Kunming 650221China

[Objectives]To analyze the relationship between the land use pattern and the carbon sequestration level of the ecosystem vegetation in Kunming City,and to provide a certain reference for optimizing the land ecological use pattern and scientific carbon reduction and sequestration.[Methods]Based on remote sensing data,meteorological data,vegetation data and soil data,the Carnegie-Ames-Stanford Approach(CASA)was adopted to estimate the vegetation net primary productivity(NPP)in Kunming during 2005-2020,and then the vegetation carbon sink was calculated through the plant mortality ***,it established the land use transfer matrix of Kunming City,and analyzed the change characteristics of the carbon sink of ecosystem vegetation in Kunming City under the influence of land use changes.[Results]During 2005-2020,the water area,construction land and unused land area in Kunming increased by 43.52,710.51 and 2.8 km 2,respectively;farmland,woodland and grassland decreased by 269.72,140.20 and 347.03 km 2,respectively;farmland,woodland,grassland,water area,construction land and unused land caused a total of 58212.72 t of vegetation net carbon sink loss in land conversion,accounting for 14.88%,25.23%,11.95%,10.58%,37.09%,and 0.26%,respectively.[Conclusions]This study is expected to help to improve the ecological carbon sequestration capacity of Kunming and promote the sustainable development of land resources.

关键词： Land use Net primary productivity(NPP) carbon sink carbon gain and loss