基于DMSP/OLS夜间灯光数据的东北地区经济差异的时空特征

The Spatial-temporal Characteristics of Urban Economic Inequality in Northeast China Based on DMSP/OLS Night-time Light Data

基于DMSP/OLS夜间灯光数据,以2003-2013年东北地区43个城市为研究对象,在使用变异系数和泰尔指数对其经济差异进行测度的基础上,运用标准差椭圆和空间马尔可夫链分析东北地区城市经济差异的时空特征。研究表明:一是研究期间内东北地区区域协调发展取得一定成果,城市经济差异总体表现出在波动中缩小的态势,但区域内部差距依旧突出。二是东北地区城市经济总体呈现出较稳定的西南-东北方向的空间分布格局,经济重心缓慢向北迁移,而且城市经济在长轴和短轴方向上都呈持续扩张的趋势。三是由空间马尔可夫链可知,东北地区城市经济发展存在趋同现象与空间溢出效应,但不同邻域环境对各城市经济类型的转移存在异质性。

Based on DMSP/OLS night-time light data,taking 43 cities in Northeast China from 2003 to 2013 as the research objects,the paper analyzes spatial-temporal characteristics of urban economic inequality in Northeast China with standard deviation ellipse and spatial Markov chain on the basis of measuring their economic inequality with coefficient of variation and Theil index.The results were showed as follows.Firstly,the coordinated and sustainable regional development of Northeast China achieved certain results,and the overall urban economic differences showed a trend of narrowing in the fluctuation,but the gap within the region was still prominent during the study period.Secondly,the urban economy in Northeast China generally presents a relatively stable spatial distribution pattern from southwest to northeast,the economic center of gravity slowly moves northward,and the urban economy shows a trend of continuous expansion in both the long axis and the short axis.Finally,it can be known from spatial Markov chain that urban economic development of Northeast China has the convergence phenomenon and spatial spillover effect,but there is heterogeneity in the transfer of economic types in different neighborhood environments.