With the rapid development of population and urbanization and the progress of lighting technology, the influence of artificial light sources has increased.In this context, the problem of light pollution has attracted ...With the rapid development of population and urbanization and the progress of lighting technology, the influence of artificial light sources has increased.In this context, the problem of light pollution has attracted wide attention.Previous studies have revealed that light pollution can affect biological living environments, human physical and mental health, astronomical observations and many other aspects.Therefore, organizations internationally have begun to advocate for measures to prevent light pollution, many of which are recognized by the International Dark-Sky Association(IDA).In addition to improving public awareness, legal protections, technical treatments and other means, the construction of Dark Sky Reserves(DSR) has proven to be an effective preventive measure.So far, as a pioneer practice in this field, the IDA has identified 11 DSRs worldwide.Based on the DA requirements for DSRs, this paper utilizes NPP-VIIRS nighttime light data and other multi-source spatial data to analyze possible DSR sites in China.The land of China was divided into more than ten thousand 30 km × 30 km fishnets, and constraint and suitable conditions were designated, respectively, as light and cloud conditions, and scale, traffic and attractiveness conditions.Using a multiple criteria evaluation, 1443 fishnets were finally selected as most suitable sites for the construction of DSRs.Results found that less than 25% of China is not subject to light pollution, and less than 13% is suitable for DSR construction, primarily in western and northern areas, including Tibet, Xinjiang, Qinghai, Gansu and Inner Mongolia.展开更多
评估城市发展水平与制定城市规划和城市发展政策息息相关。已有研究表明人口、国内生产总值(GDP)等统计数据和夜间灯光遥感数据能够用来衡量城市发展水平,但大多研究只关注城市发展总量,忽视了发展速度对城市发展的影响。因此,本文基于2...评估城市发展水平与制定城市规划和城市发展政策息息相关。已有研究表明人口、国内生产总值(GDP)等统计数据和夜间灯光遥感数据能够用来衡量城市发展水平,但大多研究只关注城市发展总量,忽视了发展速度对城市发展的影响。因此,本文基于2012年—2019年Suomi NPP-VIIRS(Suomi National Polar-OrbitingPartnership-Visible Infrared Imaging Radiometer Suite)夜间灯光遥感数据,提出了兼顾城市发展水平和增速的夜间灯光类动能指数用于测度城市发展类动能;利用动态时间规整DTW(Dynamic Time Warping)算法构建了城市发展类动能相似性检测分析框架,并基于相似性检测结果对全国328个城市进行了等级划分。相较于2019年第一财经公布的一至五线城市,本文城市等级划分结果表明,在同一等级中的城市发展更为相似和合理,也证明了城市发展类动能更有利于城市发展水平的评估;以长江三角洲城市群为例,进一步验证了城市发展类动能和基于DTW相似性检测方法用于评估城市群发展情况与合理性的潜力。综上所述,基于夜间灯光遥感的城市发展类动能估算与相似性分析方法能够较好地评估城市发展水平,为城市分级与城市群发展评估提供科学依据。展开更多
基金Under the auspices of the National Natural Science Foundation of China(No.41871162)
文摘With the rapid development of population and urbanization and the progress of lighting technology, the influence of artificial light sources has increased.In this context, the problem of light pollution has attracted wide attention.Previous studies have revealed that light pollution can affect biological living environments, human physical and mental health, astronomical observations and many other aspects.Therefore, organizations internationally have begun to advocate for measures to prevent light pollution, many of which are recognized by the International Dark-Sky Association(IDA).In addition to improving public awareness, legal protections, technical treatments and other means, the construction of Dark Sky Reserves(DSR) has proven to be an effective preventive measure.So far, as a pioneer practice in this field, the IDA has identified 11 DSRs worldwide.Based on the DA requirements for DSRs, this paper utilizes NPP-VIIRS nighttime light data and other multi-source spatial data to analyze possible DSR sites in China.The land of China was divided into more than ten thousand 30 km × 30 km fishnets, and constraint and suitable conditions were designated, respectively, as light and cloud conditions, and scale, traffic and attractiveness conditions.Using a multiple criteria evaluation, 1443 fishnets were finally selected as most suitable sites for the construction of DSRs.Results found that less than 25% of China is not subject to light pollution, and less than 13% is suitable for DSR construction, primarily in western and northern areas, including Tibet, Xinjiang, Qinghai, Gansu and Inner Mongolia.
文摘评估城市发展水平与制定城市规划和城市发展政策息息相关。已有研究表明人口、国内生产总值(GDP)等统计数据和夜间灯光遥感数据能够用来衡量城市发展水平,但大多研究只关注城市发展总量,忽视了发展速度对城市发展的影响。因此,本文基于2012年—2019年Suomi NPP-VIIRS(Suomi National Polar-OrbitingPartnership-Visible Infrared Imaging Radiometer Suite)夜间灯光遥感数据,提出了兼顾城市发展水平和增速的夜间灯光类动能指数用于测度城市发展类动能;利用动态时间规整DTW(Dynamic Time Warping)算法构建了城市发展类动能相似性检测分析框架,并基于相似性检测结果对全国328个城市进行了等级划分。相较于2019年第一财经公布的一至五线城市,本文城市等级划分结果表明,在同一等级中的城市发展更为相似和合理,也证明了城市发展类动能更有利于城市发展水平的评估;以长江三角洲城市群为例,进一步验证了城市发展类动能和基于DTW相似性检测方法用于评估城市群发展情况与合理性的潜力。综上所述,基于夜间灯光遥感的城市发展类动能估算与相似性分析方法能够较好地评估城市发展水平,为城市分级与城市群发展评估提供科学依据。
