A Study On The Family Of Ecological Footprint In China

While the modern industrial civilization has brought about tremendous material enrichment for human beings,the resulting resource and environmental problems are increasingly becoming"shortcomings"that restrict social development.An objective assessment of the current status of human activities is the first step toward achieving sustainable development.The ecological footprint family is precisely such an assessment index.This article takes three footprints in the family of ecological footprints as an example?ie,carbon footprint,energy footprint,ecological footprint?,based on statistical data and frontier estimation methods,and uses mathematical statistical analysis methods to analyze the temporal and spatial characteristics of China's three types of footprint types.And using Pearson correlation analysis and K-mean clustering methods to explore the driving factors of each footprint.In order to reveal China's three footprints and the spatial utilization pattern of natural capital,it provides a theoretical basis for guiding China's ecological-economic sustainable development.This article studies the following conclusions:?1?The study of carbon footprint in this paper is based on the research method of Mancini et al.Using IPCC and China's eighth forest inventory data to calculate the key parameters of China's average forest carbon sequestration,and thus obtain the value of China's ton carbon footprint.The key parameters in the calculation of the ton carbon footprint,the average forest carbon sequestration,can more accurately reflect the long-term carbon sequestration capacity of the forest.Therefore,this paper seeks to provide a potential carbon footprint for China with respect to the range of average forest carbon sequestration and the value of ton carbon footprint.The research on AFCS and tons of carbon footprint will not only further enhance the understanding of China's carbon footprint,but also have certain practical significance in guiding China's low-carbon economic development.The results of the carbon footprint study show that:The value of SRh for soil organic carbon loss in China in 2014 is 7.31×108t C yr-1;The average forest carbon sequestration in China is between0.62±0.21tCha-1yr-1)The forest carbon sequestration rate depends on human management of three types of forests?primary forests,other naturally regenerated forests,and artificial forests?;carbon emissions are related to forest fires,soil,and wood products acquired;2014 The average annual growth rate of carbon dioxide sequestration rate per hectare of forest land in China is 2.296%,and the carbon footprint per ton is 0.81t.Forest destruction caused it to change from a carbon sink to a carbon source,and the loss of soil carbon caused by soil tillage increased,resulting in an average forest carbon sequestration?AFCS?in China's forests.?2?In order to understand the impact of energy consumption on the ecological environment and the level of space occupation,this paper is based on the global net primary productivity,on the one hand accounting for the total energy footprint and per capita energy footprint of China from 2001 to 2015,and on the other The spatial composition of footprint equivalence and the size of the energy footprint factor are calculated.The results show that:China's total energy footprint and per capita energy footprint both show an upward trend,and gains in 2001-2007 increase>2008-2015;In terms of energy footprint equivalent space composition,forest land,grassland,and arable land have the highest proportion;construction land and desert have the second largest proportion;water areas and oceans have the lowest proportion;Energy footprint factor changes:solid state>liquid state>Gaseous>Electric energy;The proportion of land occupied by high net primary productivity land types should be emphasized.Both provide a powerful carbon absorption ecological service that can effectively eliminate human CO₂ emissions;should try to Use environmentally friendly energy sources?such as electricity,etc.?instead of traditional energy sources?such as coal,etc.?,and use more energy types with lower energy equivalent emission values to achieve significant Reduce energy footprint.?3?In order to reveal the spatial utilization pattern of China's ecological footprint and natural resources,and promote the further development and improvement of the ecological footprint theory,this paper comprehensively analyzes China's and China's31 provinces in different years from 1990-2012 based on the three-dimensional ecological footprint model.The spatial and temporal differences and their driving factors of footprint depth,footprint breadth,and spatial utilization patterns of China's natural capital.The results show that:The per capita footprint depth of China shows an increasing trend from 1990 to 2012,and the average per capita footprint depth in North China and East China is larger,and the per capita footprint is smaller in Northeast China;The per capita footprint of China shows an inverted V-shape.“And the average per capita footprint of eastern and northern China is smaller,and the per capita footprint of the northeast and northwest is larger;The per capita footprint depth and economic development are consistent with the Kuznets curve characteristics.The main driver of per capita footprint is Types of land use;The regional accumulation effect of sustainable use of natural capital in 31 provinces in China can be divided into three types;Minimize fossil energy use,optimize energy consumption structure,and increase energy efficiency to reduce footprint Depth,reduce the extent of natural capital stock depletion.