环鄱阳湖生态城市群城市建设用地碳排放生态效率研究

Reserch on the Carbon Emission Ecological Efficiency of Urban Construction Land Use in Urban Agglomation Encircleing Poyang Lake

利用环鄱阳湖生态城市群六个地级市2003—2016年的相关数据,综合采用Super-SBM-Undesire模型对其城市建设用地碳排放生态效率进行了综合测算,在此基础上,借鉴Barro的收敛性分析框架对其收敛性进行了实证检验,与此同时,采用探索性空间分析技术,对不同空间权重情境下的空间外溢效应进行了实证检验,研究结果表明首先,环鄱阳湖生态城市群城市建设用地碳排放生态效率相对较高,2003—2016年的均值为0.78,年际波动明显,动态变化趋势类似于一个“U形”,内部差异较高,最高的鹰潭市约为最低城市上饶市的1.54倍。其次,在考察期内,环鄱阳湖生态城市群的碳排放生态效率总体呈收敛之势,但不同时期的收敛特性差别明显,其中2003-2009呈收敛之势,而2010—2016年的收敛特性并不明显。第三,环鄱阳湖生态城市群城市建设用地碳排放生态效率的空间相关性较弱,且不同空间权重情境下的差别明显,其中架构在水面相邻基础上的空间外溢效应显著为负,但在考察期内并不对称,仅在2009年后显著,且强度在不断衰减。与此相反,架构在陆面相邻基础上的空间外溢效应虽然为负,但在统计上并不显著。最后,区域政策对架构在实体权重基础上的城市建设用地碳排放生态效率具有一定的调节作用,但对不同空间权重空间外溢效应的调节作用是非对称的,其中区域政策与水面邻接权重相互耦合,但方向相反,有效地弱化了其所触发的负的城市建设用地碳排放生态效率空间外溢效应,但对陆面邻接的调节作用并不明显。

The author measured the carbon emission eco-efficiency of urban construciton land use(CEEEUCLU)in urban agglomation encircling Poyang lake by utilizing the Super-SBM-Undesire model with the dateset from 2003-2016 in six prefecture-level cities around Poyang Lake,after that,this paper made an convergence and spatial autocorrelation analysis on it.The results show that:(1)CEEEUCLU is relatively high in the urban agglomation encircling Poyang lake during 2003-2016,and the average CEEUCLU level reached 0.78.Nenvertheless,the CEEEUCLU fluctuated a lot from one year to anthoer,and the dynamic trends similar to a“U shape”.What’s more,CEEEUCLU differentiated a lot among cities,which is 54%highter for the highest city than the lowest city;(2)During the inspection period,CEEUCLU presented convergence characteristics on the whole,while differentiated a lot from different sub-periond,compared to the 2003-2009 period,covergence characteristics for 2010-2016 is not obvious;(3)The spatial autocorrelation of CEEUCLU is realtively weak on the whole,which is significantly negative based on the water surface adjacency weight,while not obvious based on the land surface adjacency weight;(4)the regional policy has an regulatory effect on the spillover effect,to be specific,the regional policy coulped with the water surface adjacency weight and weakened the spillover effect.On the contrary,it had non regulatory effect on the land surfacace adjacency weight and it’s spillover effect successively.