Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China.
College of Resource and Environment, University of Chinese Academy of Sciences, Beijing, China.
PLoS One. 2021 May 4;16(5):e0246011. doi: 10.1371/journal.pone.0246011. eCollection 2021.
In recent years, with rapid urbanization, the underlying urban surface has changed dramatically. Various urban eco-environmental problems have emerged globally, among which the urban heat island effect has become one of the most obvious urban eco-environmental problems. In this study, Nanjing, China, was chosen as the study area. Based on Landsat 8 remote sensing image data collected in Nanjing from 2014 to 2018, land surface temperatures were retrieved, the spatiotemporal variation track and characteristics of the thermal environment pattern were systematically depicted, and the driving factors of these variations were revealed. The results show that over the past five years, the spatial pattern of the heat field in Nanjing changed from a scattered distribution in the periphery of the city to a centralized distribution in the centre of the city, and the heat island intensity increased annually. Changes in administrative divisions, changes in the layout of the transportation trunk lines, transfer of industrial centres, and ecological construction projects are important driving factors for the evolution of the land surface thermal environment patterns of these regions. These research results will provide scientific and technological support for similar cities with typical heat island effects elsewhere in the world to formulate urban development plan, and to improve the urban ecological environment.
近年来，随着城市化的快速发展，城市下垫面发生了剧烈变化。全球范围内出现了各种城市生态环境问题，其中城市热岛效应成为最为显著的城市生态环境问题之一。本研究选取中国南京市为研究区，基于南京市 2014-2018 年的 Landsat 8 遥感影像数据，反演得到地表温度，系统刻画了南京市热环境格局的时空演变轨迹和特征，并揭示了这些变化的驱动因素。结果表明：过去 5 年，南京市热场空间格局由城市边缘的分散分布逐渐向城市中心的集中分布转变，热岛强度逐年增加。行政区划的调整、交通干线布局的改变、产业中心的转移以及生态建设工程等是导致这些区域地表热力环境格局演变的重要驱动因素。这些研究结果将为世界其他具有典型热岛效应的类似城市制定城市发展规划和改善城市生态环境提供科技支撑。
