我国城市夜间光环境多尺度时空演变特征分析

本文以全国省、市级区域1992—2020年夜间灯光为研究对象,基于DMSP和VIRS遥感影像以及城市行政区域矢量数据,采用一元线性回归分析方法构建灯光演变趋势,从时间和空间两个维度,并结合全国、分区和城市尺度对中国夜间灯光时序变化特征进行分析。结果表明:(1)研究年份内灯光增加多集中在东部沿海区域以及中部省会中心城市,灯光减少区域多集中在山西、陕西等中西部城市;(2)在中、东、西部时空变化中,东部区域增长区和高亮度区域面积占比最高,西部最低;(3)在19个典型沿海城市中,上海等东南部城市灯光增长最快且亮度最高,灯光增速和亮度值由高到低排列顺序为由南到北。

Analysis of Multi-scale Spatio-temporal Evolution Characteristics of Urban Night Light Environment in China

This paper takes the night lighting in the provinces and municipalities across the country from 1992 to 2020 as the research object.Based on DMSP and VIRS remote sensing images and urban administrative area vector data,the unary linear regression analysis method is used to construct the evolution trend of lighting.From the two dimensions of time and space,and combined with the national,regional and city scales,the characteristics are analyzed of the time series of night lighting changes in China.The results show that:(1)There are obvious regional differences in the trend of night lighting in China within 30 years.The increase in lighting is mostly concentrated in the eastern coastal areas and central cities in central provincial capitals,and the areas of reduced lighting are mostly concentrated in central and western cities such as Shanxi and Shaanxi.(2)In the comparison of temporal and spatial changes in the central,eastern,and western regions,the growth area and high-brightness regions in the eastern region accounted for the highest proportions,and the western region the lowest.(3)Among the 19 typical coastal cities,Shanghai and other southeastern cities have the fastest lighting growth and the highest brightness.The lighting growth rate and brightness value are arranged from high to low in order from south to north.