2012-2017年呼包鄂城市群夜间灯光动态变化特征及其驱动因素分析

针对当前处于大发展变革阶段的新兴城市群时空变化及驱动因素不明的问题,文章基于2012—2017年夜间灯光影像数据,利用数值统计、标准差椭圆和线性回归等分析方法,结合高分遥感数据和其他辅助数据,研究了呼包鄂城市群夜间灯光在地理空间上的规模分布和变化,分析了夜间灯光的灯光变化与经济发展的关系,并进一步探究了城市群夜间灯光发展的扩张强度、方向以及主要驱动因素。研究结果表明:过去6年间,呼包鄂城市群夜间灯光强度呈现“V”型曲线,与其GDP的发展趋势是一致的;通过椭圆重心分析,显示整个城市群的夜间灯光重心向位于西南方向的鄂尔多斯市移动,鄂尔多斯市对整个城市群的经济发展有较强的拉动作用;利用夜间灯光驱动因子分析,并结合高分遥感光学影像以及灯光变化的区域,发现呼包鄂城市群的发展受能源因素的影响最大,是目前主导城市群发展的关键因素。

Analysis of Dynamic Characteristics and Driving Factors of Night-time Lighting Changes in Hohhot-Baotou-Ordos Urban Agglomeration from 2012 to 2017

In view of the current problems of unclear spatial and temporal changes and driving factors of emerging urban agglomerations in the stage of major development and transformation,in this paper,the scale distribution and change of night-time lights in the geographical space in Hohhot-Baotou-Ordos urban agglomeration are studied,the relationship between the changes of night-light lights and economic development is analyzed,and the expansion intensity,direction and main drivers of night-light development in urban agglomerations are also discussed.The study is based on night light image data from 2012 to 2017,which is conducted with numerical statistics,standard deviation ellipse and linear regression analysis methods,in combination with high-resolution remote sensing data and other auxiliary data.The results of the study show that in the past six years,the night light intensity of Hohhot-Baotou-Ordos regions showed a“V”curve,which is consistent with its GDP development trend.Through the analysis of the ellipse center of gravity,it can be seen that the center of nightlight of the entire urban agglomeration is moving towards Ordos which is located in the southwest.Ordos has a strong pulling effect on the economic development of the entire urban agglomeration.With night light driving factor analysis in combination with high-resolution remote sensing optical images and areas with light changes,it is found that the biggest influence of the development in Hohhot-Baotou-Ordos urban agglomeration is the energy factor,which is the key factor that currently dominates the development of urban agglomerations.