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提高城市建设用地开发强度容易陷入增加投入与控制碳排放两难选择的困境,理想碳排放效率下的适度建设用地开发强度成为控制碳排放与兼顾城市经济发展的关键。本文计算了中国30个省份2003年、2006年、2009年与2012年的建设用地开发强度,然后基于松弛测度(Slack Based Measure,SBM)模型估算了建设用地开发强度的碳排放总效率、技术效率和规模效率。研究结果表明:1在时空分布上,城市建设用地开发强度与其碳排放效率是动态变化的,但两者变化趋势并不一致;2城市建设用地开发强度2003-2006年增长缓慢,东部略高;2006-2009年增长明显,东中西差异不大;2009-2012年大幅提升,西部建设用地开发强度超过东部和中部;32003-2012年,碳排放有效省份由中西部向东部转移,东西部地区具有较高的碳排放效率值;4技术效率不足是引起碳排放总效率低下的主要原因;5东部地区由于减缓建设用地开发强度增速得以提高碳排放效率,中西部地区因建设用地开发强度的快速提升而无法兼顾碳排放效率。最后,针对总效率无效省份,构建结合了东中西土地利用与经济发展特点的低碳优化策略,以期改善城市建设用地开发强度的碳排放效率。
Increasing the intensity of urban construction land development is apt to fall into the dilemma of increasing investment and controlling carbon emissions. The moderate development intensity of ideal construction land under the optimal carbon emission efficiency has become the key to controlling carbon emissions and balancing urban economic development. This paper calculates the intensity of the development of construction land in 2003, 2006, 2009 and 2012 in 30 provinces in China. Then, based on the Slack Based Measure (SBM) model, the total efficiency of carbon emissions and the technical efficiency And scale efficiency. The results show that: 1 in the spatial and temporal distribution, the intensity of urban construction land development and its carbon emission efficiency are dynamic, but the trend of the two is not consistent; 2 development intensity of urban construction land in 2003-2006 slow growth, the eastern slightly higher; 2006 - Significantly increased in 2009 with little difference between East and West China; Significantly increased in 2009-2012, with intensified development of construction land in the western region over the eastern and central regions; 32003-2012, the effective province of carbon emission shifted from the central and western parts to the eastern part, while the eastern and western regions High efficiency of carbon emission efficiency; 4 lack of technical efficiency is the main cause of the overall carbon emissions low efficiency; 5 eastern region due to the slowdown in the intensity of development of construction land to increase carbon emissions efficiency, the rapid development of central and western regions due to the intensity of the development of land for construction And can not take into account the efficiency of carbon emissions. Finally, aiming at the inefficient provinces with total inefficiency, a low-carbon optimization strategy based on the land use and economic development in East, West and East China is constructed in order to improve the carbon emission efficiency of urban construction land development intensity.