Climate change is the greatest environmental threat to humans and the planet in the 21st century.Global anthropogenic greenhouse gas emissions are one of the main causes of the increasing number of extreme climate eve...Climate change is the greatest environmental threat to humans and the planet in the 21st century.Global anthropogenic greenhouse gas emissions are one of the main causes of the increasing number of extreme climate events.Cumulative carbon dioxide(CO_(2))emissions showed a linear relationship with cumulative temperature rise since the pre-industrial stage,and this accounts for approximately 80%of the total anthropogenic greenhouse gases.Therefore,accurate and reliable carbon emission data are the foundation and scientific basis for most emission reduction policymaking and target setting.Currently,China has made clear the ambitious goal of achieving the peak of carbon emissions by 2030 and achieving carbon neutrality by 2060.The development of a finer-grained spatiotemporal carbon emission database is urgently needed to achieve more accurate carbon emission monitoring for continuous implementation and the iterative improvement of emission reduction policies.Near-real-time carbon emission monitoring is not only a major national demand but also a scientific question at the frontier of this discipline.This article reviews existing annual-based carbon accounting methods,with a focus on the newly developed real-time carbon emission technology and its current application trends.We also present a framework for the latest near-real-time carbon emission accounting technology that can be widely used.The development of relevant data and methods will provide strong database support to the policymaking for China’s“carbon neutrality”strategy.Finally,this article provides an outlook on the future of real-time carbon emission monitoring technology.展开更多
Green eco-district planning and construction occupies a very important position in China's future low carbon urbanization roadmap because the experience gained through practice will provide cities with a technical...Green eco-district planning and construction occupies a very important position in China's future low carbon urbanization roadmap because the experience gained through practice will provide cities with a technical pathway to manage climate change and reduce carbon emissions. However, during the current preparation and implementation stage of the green eco-district plans, both the planning management departments and planning design institutes are faced with the problem of how to quantify the greenhouse gases(GHG) emissions, especially the CO_2 emissions, when approval decisions are to be made. Aiming at setting up a carbon accounting protocol within the statutory framework of China's green eco-district planning and construction management system, this paper argues that it is important to incorporate the GHG emission inventory into the statutory regulatory planning system, and discusses the technical issues and coping measures for assessing carbon emissions at the district level. It proposes to refine the Activity Data(AD) and Emission Factors(EF) in the current China's National GHG Inventory and set up the urban district carbon accounting protocol based on nine sectors. These nine emission accounting sectors are established according to the key policy and function as defined in the statutory local regulatory plans under the present planning system in Chinese cities. Taking planning and construction management at the district level as a platform to control carbon emissions, it develops an initial carbon accounting protocol suitable for China's green eco-districts which can be applied in both the existing and planned urban areas, and be integrated into the decision making process of the local planning process.展开更多
Introduction:Research has shown the negative impacts of climate change on the economy and how the state of the environment has been a complex global challenge.Prior studies have suggested immediate actions to avoid an...Introduction:Research has shown the negative impacts of climate change on the economy and how the state of the environment has been a complex global challenge.Prior studies have suggested immediate actions to avoid any unforeseen circumstances for all living things on Earth.Previous research has also supported all kinds of sustainability efforts as resolutions to address the deterioration of climate change caused by business activities.Originality:There is a need for companies to start acting and assigning employees to mitigate carbon emitted by corporations.This study is motivated by the lack of empirical evidence that examines how corporate carbon governance influences better carbon performance of organizations and authorizes organizations to implement and embed carbon accounting.Objective:This study used evidence from Malaysia to explore this subject matter and examined the association between carbon governance and carbon performance of corporations.The research also investigated the mediation effect of carbon accounting with respect to carbon governance and carbon performance.Findings:It is revealed that carbon governance had no significant influence on an organization’s carbon performance although carbon accounting implementation positively influenced carbon performance.The findings imply that despite its insignificance,carbon accounting remains a vital matter to be deployed by organizations for better carbon emission mitigation.展开更多
Introduction:Research has shown the negative impacts of climate change on the economy and how the state of the environment has been a complex global challenge.Prior studies have suggested immediate actions to avoid an...Introduction:Research has shown the negative impacts of climate change on the economy and how the state of the environment has been a complex global challenge.Prior studies have suggested immediate actions to avoid any unforeseen circumstances for all living things on Earth.Previous research has also supported all kinds of sustainability efforts as resolutions to address the deterioration of climate change caused by business activities.Originality:There is a need for companies to start acting and assigning employees to mitigate carbon emitted by corporations.This study is motivated by the lack of empirical evidence that examines how corporate carbon governance influences better carbon performance of organizations and authorizes organizations to implement and embed carbon accounting.Objective:This study used evidence from Malaysia to explore this subject matter and examined the association between carbon governance and carbon performance of corporations.The research also investigated the mediation effect of carbon accounting with respect to carbon governance and carbon performance.Findings:It is revealed that carbon governance had no significant influence on an organization's carbon performance although carbon accounting implementation positively influenced carbon performance.The findings imply that despite its insignificance,carbon accounting remains a vital matter to be deployed by organizations for better carbon emission mitigation.展开更多
It is difficult to quantify and certify the greenhouse gas(GHG)emission reduction in the entire process of a project of carbon capture,utilization and storage(CCUS)-enhanced oil recovery(EOR).Under the methodological ...It is difficult to quantify and certify the greenhouse gas(GHG)emission reduction in the entire process of a project of carbon capture,utilization and storage(CCUS)-enhanced oil recovery(EOR).Under the methodological framework for GHG voluntary emission reduction project,the carbon emission reduction accounting method for CCUS-EOR project was established after examining the accounting boundaries in process links,the baseline emission and project emission accounting methods,and the emission and leakage quantification and prediction models,in order to provide a certification basis for the quantification of GHG emission reduction in the CCUS-EOR project.Based on the data of energy consumption,emission and leakage monitoring of the CCUS-EOR industrial demonstration project in Jilin Oilfield,the net emission reduction efficiency is determined to be about 91.1%at the current storage efficiency of 80%.The accounting and prediction of carbon emission reduction for CCUS-EOR projects with different concentrations and scales indicate that within the project accounting boundary,the certified net emission reduction efficiency of the low-concentration gas source CCUS-EOR projects represented by coal-fired power plants is about 37.1%,and the certified net emission reduction efficiency of the high-concentration gas source CCUS-EOR projects represented by natural gas hydrogen production is about 88.9%.The proposed method is applicable to the carbon emission reduction accounting for CCUS-EOR projects under multiple baseline scenarios during the certification period,which can provide decision-making basis for the planning and deployment of CCUS-EOR projects.展开更多
The production and business activity of enterprises is the key factor which causes environmental pollution. It will be conducive to sustainable development of human beings if the environmental issues can be integrated...The production and business activity of enterprises is the key factor which causes environmental pollution. It will be conducive to sustainable development of human beings if the environmental issues can be integrated into accounting calculation by using accounting methods. It is extremely necessary to develop carbon accounting in our country. However, the enterprises in our country are also facing a lot of dilemmas under the state of low-carbon economy. Therefore, perfect carbon accounting standards and accounting systems should be established, social and government supervision of carbon accounting strengthened, national public awareness of low-carbon environment consolidated and the professional level of the accounting personnel improved.展开更多
To better promote forest resource management and strengthen the development of forest carbon sink marketization, this paper studied the accounting of forest carbon sinks from 2003 to 2008 based on a system of national...To better promote forest resource management and strengthen the development of forest carbon sink marketization, this paper studied the accounting of forest carbon sinks from 2003 to 2008 based on a system of national accounts （SNA） and data from the latest forest resources inventory in China. The study calculated the value of forest carbon stocks at a total of RMB 817.13 × 10^9 yuan in 2003 and RMB 839.93×10^9 yuan in 2008, with an average annual increase of 0.55 % from an increase in physical carbon sinks. The total value of forest carbon sinks in 2003 and 2008 was RMB 26.73×10^9 yuan and RMB 29.77×10^9 yuan, respectively, with an average annual growth of 2.18 %. From 2003 to 2008, both stock and flow value of forest carbon sinks increased, but the total net flow value of carbon sinks decreased. The growth rate for the environmentally adjusted Gross Domestic Product （eaGDP） for China＇s forest carbon sinks was 17.23 %, outstripping the average growth rate of 9.5 % for the GDP during the same period. The study alsoindicates that China＇s forest carbon sinks affects the GDP in the range of 0.25-0.26 %, and its economic potential is not relatively huge.展开更多
With the high tide of economic development, more and more economic benefit management problems are coming one after the other. How to sustain healthy and stable development of enterprises has attracted much attention....With the high tide of economic development, more and more economic benefit management problems are coming one after the other. How to sustain healthy and stable development of enterprises has attracted much attention. Therefore, the change of enterprise management idea also follows. For enterprise accounting management, the current concept of carbon management accounting in carbon management accounting is highly respected. The government also actively introduces relevant policies to promote the construction of enterprise carbon management accounting system. The transformation of carbon management accounting is the inevitable trend of social and economic development and the innovation of enterprise management model.展开更多
Estimation of soil organic carbon （SOC） pools and fluxes bears large uncertainties because SOC stocks vary greatly over geographical space and through time. Although development of the U.S. Soil Survey Geographic Da...Estimation of soil organic carbon （SOC） pools and fluxes bears large uncertainties because SOC stocks vary greatly over geographical space and through time. Although development of the U.S. Soil Survey Geographic Database （SSURGO）, currently the most detailed level with a map scale ranging from 1：12 000 to 1：63 360, has involved substantial government funds and coordinated network efforts, very few studies have utilized it for soil carbon assessment at the large landscape scale. The objectives of this study were to 1） compare estimates in soil organic matter among SSURGO, the State Soil Geographic Database （STATSGO）, and referenced field measurements at the soil map unit; 2） examine the influence of missing data on SOC estimation by SSURGO and STATSGO; 3） quantify spatial differences in SOC estimation between SSURGO and STATSCO, specifically for the state of Louisiana; and 4） assess scale effects on soil organic carbon density （SOCD） estimates from a soil map unit to a watershed and a river basin scale. SOC was estimated using soil attributes of SSURGO and STATSGO including soil organic matter （SOM） content, soil layer depth, and bulk density. Paired t-test, correlation, and regression analyses were performed to investigate various relations of SOC and SOM among the datasets. There were positive relations of SOC estimates between SSURGO and STATSGO at the soil map unit （R2 = 0.56, n = 86, t = 1.65, P = 0.102; depth： 30 cm）. However, the SOC estimated by STATSGO were 9%, 33% and 36~ lower for the upper 30-cm, the upper l-m, and the maximal depth （up to 2.75 m） soils, respectively, than those from SSURGO. The difference tended to increase as the spatial scale changes from the soil map unit to the watershed and river basin scales. Compared with the referenced field measurements, the estimates in SOM by SSURGO showed a closer match than those of STATSCO, indicating that the former was more accurate than the latter in SOC estimation, both in spatial and temporal resolutions. Further applications of SSURGO in SOC estimation for the entire United States could improve the accuracy of soil carbon accounting in regional and national carbon balances.展开更多
Excessive greenhouse gas emissions lead to global warming,which poses a critical challenge for human society.Worldwide consensus that carbon emissions must be reduced to achieve sustainable development has raised rese...Excessive greenhouse gas emissions lead to global warming,which poses a critical challenge for human society.Worldwide consensus that carbon emissions must be reduced to achieve sustainable development has raised research interest on the topic of carbon footprint,an assessment standard for measuring greenhouse gas emissions.To shed light on this important topic,we introduce carbon footprint-related international standards and domestic policies,and conduct quantitative and qualitative analyses to provide a comprehensive overview of the current carbon footprint literature.Specifically,through a bibliometric analysis of 13203 carbon foot-print publications circulated over the past decade,we quantify the publication volume,influence,and collaboration networks of countries/regions,institutions,and journals.The results show that publications on carbon footprint have been increasing since 2013,and more so after 2017.Regarding domain influence,China and its academic institutions show a strong influence.In addition,a cluster analysis of the keywords of all publications shows seven categories,encompassing carbon footprint accounting methods and research priorities.Furthermore,a qualitative analysis of the research methods and subjects related to carbon footprint reveals the need to increase communication and collaboration among different disciplines and countries/regions to strengthen the construction of carbon footprint systems.Accordingly,this study identifies popular topics and development trends in the carbon footprint literature to provide research direction for promoting green and low-carbon transformation of the social economy to achieve sustainable development.展开更多
Addressing climate change has become a common issue around the world in the 21st century and equally an important mission in Chinese forestry.Understanding the development of monitoring and assessment of forest biomas...Addressing climate change has become a common issue around the world in the 21st century and equally an important mission in Chinese forestry.Understanding the development of monitoring and assessment of forest biomass and carbon storage in China is important for promoting the evaluation of forest carbon sequestration capacity of China.The author conducts a systematic analysis of domestic publications addressing＂monitoring and assessment of forest biomass and carbon storage＂in order to understand the development trends,describes the brief history through three stages,and gives the situation of new development.Towards the end of the 20th century,a large number of papers on biomass and productivity of the major forest types in China had been published,covering the exploration and efforts of more than 20 years,while investigations into assessment of forest carbon storage had barely begun.Based on the data of the 7th and 8th National Forest Inventories,forest biomass and carbon storage of the entire country were assessed using individual tree biomass models and carbon conversion factors of major tree species,both previously published and newly developed.Accompanying the implementation of the 8th National Forest Inventory,a program of individual tree biomass modeling for major tree species in China was carried out simultaneously.By means of thematic research on classification of modeling populations,as well as procedures for collecting samples and methodology for biomass modeling,two technical regulations on sample collection and model construction were published as ministerial standards for application.Requests for approval of individual tree biomass models and carbon accounting parameters of major tree species have been issued for approval as ministerial standards.With the improvement of biomass models and carbon accounting parameters,thematic assessment of forest biomass and carbon storage will be gradually changed into a general monitoring of forest biomass and carbon storage,in order to realize their dynamic monitoring in national forest inventories.Strengthening the analysis and assessment of spatial distribution patterns of forest biomass and carbon storage through application of remote sensing techniques and geostatistical approaches will also be one of the major directions of development in the near future.展开更多
Increasing the efficiency and proportion of photovoltaic power generation installations is one of the best ways to reduce both CO_(2) emissions and reliance on fossil-fuel-based power supplies.Solar energy is a clean ...Increasing the efficiency and proportion of photovoltaic power generation installations is one of the best ways to reduce both CO_(2) emissions and reliance on fossil-fuel-based power supplies.Solar energy is a clean and renewable power source with excellent potential for further development and utilization.In 2021,the global solar installed capacity was about 749.7 GW.Establishing correlations between solar power generation,standard coal equivalent,carbon sinks,and green sinks is crucial.However,there have been few reports about correlations between the efficiency of tracking solar photovoltaic panels and the above parameters.This paper calculates the increased power generation achievable through the use of tracking photovoltaic panels compared with traditional fixed panels and establishes relationships between power generation,standard coal equivalent,and carbon sinks,providing a basis for attempts to reduce reliance on carbon-based fuels.The calculations show that power generation efficiency can be improved by about 26.12%by enabling solar panels to track the sun's rays during the day and from season to season.Through the use of this improved technology,global CO_(2) emissions can be reduced by 183.63 Mt,and the standard coal equivalent can be reduced by 73.67 Mt yearly.Carbon capture is worth approximately EUR 15.48 billion,and carbon accounting analysis plays a vital role in carbon trading.展开更多
基金financially supported by the National Natural Science Foundation of China (71874097 and 41921005)Beijing Natural Science Foundation (JQ19032)+1 种基金the Qiu Shi Science & Technologies Foundationthe Shenzhen Municipal Science and Technology Commission College Stability Support Project (WDZC20200819173345002)
文摘Climate change is the greatest environmental threat to humans and the planet in the 21st century.Global anthropogenic greenhouse gas emissions are one of the main causes of the increasing number of extreme climate events.Cumulative carbon dioxide(CO_(2))emissions showed a linear relationship with cumulative temperature rise since the pre-industrial stage,and this accounts for approximately 80%of the total anthropogenic greenhouse gases.Therefore,accurate and reliable carbon emission data are the foundation and scientific basis for most emission reduction policymaking and target setting.Currently,China has made clear the ambitious goal of achieving the peak of carbon emissions by 2030 and achieving carbon neutrality by 2060.The development of a finer-grained spatiotemporal carbon emission database is urgently needed to achieve more accurate carbon emission monitoring for continuous implementation and the iterative improvement of emission reduction policies.Near-real-time carbon emission monitoring is not only a major national demand but also a scientific question at the frontier of this discipline.This article reviews existing annual-based carbon accounting methods,with a focus on the newly developed real-time carbon emission technology and its current application trends.We also present a framework for the latest near-real-time carbon emission accounting technology that can be widely used.The development of relevant data and methods will provide strong database support to the policymaking for China’s“carbon neutrality”strategy.Finally,this article provides an outlook on the future of real-time carbon emission monitoring technology.
文摘Green eco-district planning and construction occupies a very important position in China's future low carbon urbanization roadmap because the experience gained through practice will provide cities with a technical pathway to manage climate change and reduce carbon emissions. However, during the current preparation and implementation stage of the green eco-district plans, both the planning management departments and planning design institutes are faced with the problem of how to quantify the greenhouse gases(GHG) emissions, especially the CO_2 emissions, when approval decisions are to be made. Aiming at setting up a carbon accounting protocol within the statutory framework of China's green eco-district planning and construction management system, this paper argues that it is important to incorporate the GHG emission inventory into the statutory regulatory planning system, and discusses the technical issues and coping measures for assessing carbon emissions at the district level. It proposes to refine the Activity Data(AD) and Emission Factors(EF) in the current China's National GHG Inventory and set up the urban district carbon accounting protocol based on nine sectors. These nine emission accounting sectors are established according to the key policy and function as defined in the statutory local regulatory plans under the present planning system in Chinese cities. Taking planning and construction management at the district level as a platform to control carbon emissions, it develops an initial carbon accounting protocol suitable for China's green eco-districts which can be applied in both the existing and planned urban areas, and be integrated into the decision making process of the local planning process.
文摘Introduction:Research has shown the negative impacts of climate change on the economy and how the state of the environment has been a complex global challenge.Prior studies have suggested immediate actions to avoid any unforeseen circumstances for all living things on Earth.Previous research has also supported all kinds of sustainability efforts as resolutions to address the deterioration of climate change caused by business activities.Originality:There is a need for companies to start acting and assigning employees to mitigate carbon emitted by corporations.This study is motivated by the lack of empirical evidence that examines how corporate carbon governance influences better carbon performance of organizations and authorizes organizations to implement and embed carbon accounting.Objective:This study used evidence from Malaysia to explore this subject matter and examined the association between carbon governance and carbon performance of corporations.The research also investigated the mediation effect of carbon accounting with respect to carbon governance and carbon performance.Findings:It is revealed that carbon governance had no significant influence on an organization’s carbon performance although carbon accounting implementation positively influenced carbon performance.The findings imply that despite its insignificance,carbon accounting remains a vital matter to be deployed by organizations for better carbon emission mitigation.
文摘Introduction:Research has shown the negative impacts of climate change on the economy and how the state of the environment has been a complex global challenge.Prior studies have suggested immediate actions to avoid any unforeseen circumstances for all living things on Earth.Previous research has also supported all kinds of sustainability efforts as resolutions to address the deterioration of climate change caused by business activities.Originality:There is a need for companies to start acting and assigning employees to mitigate carbon emitted by corporations.This study is motivated by the lack of empirical evidence that examines how corporate carbon governance influences better carbon performance of organizations and authorizes organizations to implement and embed carbon accounting.Objective:This study used evidence from Malaysia to explore this subject matter and examined the association between carbon governance and carbon performance of corporations.The research also investigated the mediation effect of carbon accounting with respect to carbon governance and carbon performance.Findings:It is revealed that carbon governance had no significant influence on an organization's carbon performance although carbon accounting implementation positively influenced carbon performance.The findings imply that despite its insignificance,carbon accounting remains a vital matter to be deployed by organizations for better carbon emission mitigation.
基金Supported by the PetroChina Science and Technology Project (2021ZZ01-06,2021DJ1101)。
文摘It is difficult to quantify and certify the greenhouse gas(GHG)emission reduction in the entire process of a project of carbon capture,utilization and storage(CCUS)-enhanced oil recovery(EOR).Under the methodological framework for GHG voluntary emission reduction project,the carbon emission reduction accounting method for CCUS-EOR project was established after examining the accounting boundaries in process links,the baseline emission and project emission accounting methods,and the emission and leakage quantification and prediction models,in order to provide a certification basis for the quantification of GHG emission reduction in the CCUS-EOR project.Based on the data of energy consumption,emission and leakage monitoring of the CCUS-EOR industrial demonstration project in Jilin Oilfield,the net emission reduction efficiency is determined to be about 91.1%at the current storage efficiency of 80%.The accounting and prediction of carbon emission reduction for CCUS-EOR projects with different concentrations and scales indicate that within the project accounting boundary,the certified net emission reduction efficiency of the low-concentration gas source CCUS-EOR projects represented by coal-fired power plants is about 37.1%,and the certified net emission reduction efficiency of the high-concentration gas source CCUS-EOR projects represented by natural gas hydrogen production is about 88.9%.The proposed method is applicable to the carbon emission reduction accounting for CCUS-EOR projects under multiple baseline scenarios during the certification period,which can provide decision-making basis for the planning and deployment of CCUS-EOR projects.
文摘The production and business activity of enterprises is the key factor which causes environmental pollution. It will be conducive to sustainable development of human beings if the environmental issues can be integrated into accounting calculation by using accounting methods. It is extremely necessary to develop carbon accounting in our country. However, the enterprises in our country are also facing a lot of dilemmas under the state of low-carbon economy. Therefore, perfect carbon accounting standards and accounting systems should be established, social and government supervision of carbon accounting strengthened, national public awareness of low-carbon environment consolidated and the professional level of the accounting personnel improved.
基金supported by National Key Social Science Research Project(11&ZD042)Forestry Public Welfare Scientific Research Project of the State Forestry Administration in China(200904003)DAAD-K.C.Wong Postdoctoral Fellowship Programme,Germany
文摘To better promote forest resource management and strengthen the development of forest carbon sink marketization, this paper studied the accounting of forest carbon sinks from 2003 to 2008 based on a system of national accounts （SNA） and data from the latest forest resources inventory in China. The study calculated the value of forest carbon stocks at a total of RMB 817.13 × 10^9 yuan in 2003 and RMB 839.93×10^9 yuan in 2008, with an average annual increase of 0.55 % from an increase in physical carbon sinks. The total value of forest carbon sinks in 2003 and 2008 was RMB 26.73×10^9 yuan and RMB 29.77×10^9 yuan, respectively, with an average annual growth of 2.18 %. From 2003 to 2008, both stock and flow value of forest carbon sinks increased, but the total net flow value of carbon sinks decreased. The growth rate for the environmentally adjusted Gross Domestic Product （eaGDP） for China＇s forest carbon sinks was 17.23 %, outstripping the average growth rate of 9.5 % for the GDP during the same period. The study alsoindicates that China＇s forest carbon sinks affects the GDP in the range of 0.25-0.26 %, and its economic potential is not relatively huge.
文摘With the high tide of economic development, more and more economic benefit management problems are coming one after the other. How to sustain healthy and stable development of enterprises has attracted much attention. Therefore, the change of enterprise management idea also follows. For enterprise accounting management, the current concept of carbon management accounting in carbon management accounting is highly respected. The government also actively introduces relevant policies to promote the construction of enterprise carbon management accounting system. The transformation of carbon management accounting is the inevitable trend of social and economic development and the innovation of enterprise management model.
基金Supported by the U.S. Louisiana Board of Regents (No. LEQSF (2004-2007)-RD-A-04)
文摘Estimation of soil organic carbon （SOC） pools and fluxes bears large uncertainties because SOC stocks vary greatly over geographical space and through time. Although development of the U.S. Soil Survey Geographic Database （SSURGO）, currently the most detailed level with a map scale ranging from 1：12 000 to 1：63 360, has involved substantial government funds and coordinated network efforts, very few studies have utilized it for soil carbon assessment at the large landscape scale. The objectives of this study were to 1） compare estimates in soil organic matter among SSURGO, the State Soil Geographic Database （STATSGO）, and referenced field measurements at the soil map unit; 2） examine the influence of missing data on SOC estimation by SSURGO and STATSGO; 3） quantify spatial differences in SOC estimation between SSURGO and STATSCO, specifically for the state of Louisiana; and 4） assess scale effects on soil organic carbon density （SOCD） estimates from a soil map unit to a watershed and a river basin scale. SOC was estimated using soil attributes of SSURGO and STATSGO including soil organic matter （SOM） content, soil layer depth, and bulk density. Paired t-test, correlation, and regression analyses were performed to investigate various relations of SOC and SOM among the datasets. There were positive relations of SOC estimates between SSURGO and STATSGO at the soil map unit （R2 = 0.56, n = 86, t = 1.65, P = 0.102; depth： 30 cm）. However, the SOC estimated by STATSGO were 9%, 33% and 36~ lower for the upper 30-cm, the upper l-m, and the maximal depth （up to 2.75 m） soils, respectively, than those from SSURGO. The difference tended to increase as the spatial scale changes from the soil map unit to the watershed and river basin scales. Compared with the referenced field measurements, the estimates in SOM by SSURGO showed a closer match than those of STATSCO, indicating that the former was more accurate than the latter in SOC estimation, both in spatial and temporal resolutions. Further applications of SSURGO in SOC estimation for the entire United States could improve the accuracy of soil carbon accounting in regional and national carbon balances.
基金supported by the Shandong Provincial Key Research and Development Program [Grant No.2023SFGC0101]National Key Research and Development Program [Grant No.2020YFC 1910000]Mount Taishan Scholar Young Expert Program [Grant No.tsqn202103010].
文摘Excessive greenhouse gas emissions lead to global warming,which poses a critical challenge for human society.Worldwide consensus that carbon emissions must be reduced to achieve sustainable development has raised research interest on the topic of carbon footprint,an assessment standard for measuring greenhouse gas emissions.To shed light on this important topic,we introduce carbon footprint-related international standards and domestic policies,and conduct quantitative and qualitative analyses to provide a comprehensive overview of the current carbon footprint literature.Specifically,through a bibliometric analysis of 13203 carbon foot-print publications circulated over the past decade,we quantify the publication volume,influence,and collaboration networks of countries/regions,institutions,and journals.The results show that publications on carbon footprint have been increasing since 2013,and more so after 2017.Regarding domain influence,China and its academic institutions show a strong influence.In addition,a cluster analysis of the keywords of all publications shows seven categories,encompassing carbon footprint accounting methods and research priorities.Furthermore,a qualitative analysis of the research methods and subjects related to carbon footprint reveals the need to increase communication and collaboration among different disciplines and countries/regions to strengthen the construction of carbon footprint systems.Accordingly,this study identifies popular topics and development trends in the carbon footprint literature to provide research direction for promoting green and low-carbon transformation of the social economy to achieve sustainable development.
基金funded by the State Forestry Administration of China
文摘Addressing climate change has become a common issue around the world in the 21st century and equally an important mission in Chinese forestry.Understanding the development of monitoring and assessment of forest biomass and carbon storage in China is important for promoting the evaluation of forest carbon sequestration capacity of China.The author conducts a systematic analysis of domestic publications addressing＂monitoring and assessment of forest biomass and carbon storage＂in order to understand the development trends,describes the brief history through three stages,and gives the situation of new development.Towards the end of the 20th century,a large number of papers on biomass and productivity of the major forest types in China had been published,covering the exploration and efforts of more than 20 years,while investigations into assessment of forest carbon storage had barely begun.Based on the data of the 7th and 8th National Forest Inventories,forest biomass and carbon storage of the entire country were assessed using individual tree biomass models and carbon conversion factors of major tree species,both previously published and newly developed.Accompanying the implementation of the 8th National Forest Inventory,a program of individual tree biomass modeling for major tree species in China was carried out simultaneously.By means of thematic research on classification of modeling populations,as well as procedures for collecting samples and methodology for biomass modeling,two technical regulations on sample collection and model construction were published as ministerial standards for application.Requests for approval of individual tree biomass models and carbon accounting parameters of major tree species have been issued for approval as ministerial standards.With the improvement of biomass models and carbon accounting parameters,thematic assessment of forest biomass and carbon storage will be gradually changed into a general monitoring of forest biomass and carbon storage,in order to realize their dynamic monitoring in national forest inventories.Strengthening the analysis and assessment of spatial distribution patterns of forest biomass and carbon storage through application of remote sensing techniques and geostatistical approaches will also be one of the major directions of development in the near future.
文摘Increasing the efficiency and proportion of photovoltaic power generation installations is one of the best ways to reduce both CO_(2) emissions and reliance on fossil-fuel-based power supplies.Solar energy is a clean and renewable power source with excellent potential for further development and utilization.In 2021,the global solar installed capacity was about 749.7 GW.Establishing correlations between solar power generation,standard coal equivalent,carbon sinks,and green sinks is crucial.However,there have been few reports about correlations between the efficiency of tracking solar photovoltaic panels and the above parameters.This paper calculates the increased power generation achievable through the use of tracking photovoltaic panels compared with traditional fixed panels and establishes relationships between power generation,standard coal equivalent,and carbon sinks,providing a basis for attempts to reduce reliance on carbon-based fuels.The calculations show that power generation efficiency can be improved by about 26.12%by enabling solar panels to track the sun's rays during the day and from season to season.Through the use of this improved technology,global CO_(2) emissions can be reduced by 183.63 Mt,and the standard coal equivalent can be reduced by 73.67 Mt yearly.Carbon capture is worth approximately EUR 15.48 billion,and carbon accounting analysis plays a vital role in carbon trading.
