Acta Geographica Sinica ›› 2021, Vol. 76 ›› Issue (3): 566-583.doi: 10.11821/dlxb202103006

• Climate Change and Land Surface Processes • Previous Articles     Next Articles

Spatial relationship of urban development to land surface temperature in three cities of southern Fujian

SHEN Zhongjian(), ZENG Jian   

  1. School of Architecture, Tianjin University, Tianjin 300072, China
  • Received:2020-03-03 Revised:2020-10-18 Online:2021-03-25 Published:2021-05-25
  • Supported by:
    National Key R&D Program of China(2016YFC0502903);Major Projects of Philosophy and Social Sciences of the Ministry of Education(15JZD025);National Natural Science Foundation of China(51708387);Human and Social Science Foundation of Ministry of Education of China(17YJCZH013)

Abstract:

Exploring the influence mechanism of expansion for urban areas on thermal environment is significant for improving urban ecological environment. In this study, nighttime light (NTL) can be regarded as an evidence of urban development. Based on Landsat remote sensing data, DMSP/OLS nighttime light data and NPP/VIIRS nighttime light data of Xiamen, Zhangzhou and Quanzhou in southern Fujian during 1996-2017, this study applied the overall coupling model and coordination model to discuss the spatio-temporal coupling and coordination relationship between urban development and land surface temperature (LST) distribution. Additionally, the spatial response law was analyzed by standard deviation ellipse, bivariate spatial autocorrelation and landscape index. The results show that during 1996-2017, the spatial distribution patterns of LST and NTL show that urban development is closely related with factors such as geographical location and terrain. In the western inland areas with high elevations, forests are obviously concentrated with relatively low LST, while in the eastern plain areas, more urban areas are distributed with relatively high LST. In the three cities, the overall coupling situation of NTL and LST is constantly strengthening, and the proportion of coordination for NTL and LST is gradually increasing. In the early stage of urban development, the influence of NTL on LST is hysteretic. In the late stage, the influence of NTL on LST is in advance. There is a positive correlation between NTL and LST, and a spatial spillover effect is obvious. The correlation coefficient and bivariate spatial autocorrelation Moran's I value gradually increase, indicating that NTL has an increasing influence on the change of LST. The HH (High-High)-type and LL (Low-Low)-type agglomeration areas continue to expand. Influenced by the trend of integrated development of the three study cities, HH-type agglomeration area is gradually concentrated in regions connecting the cities, such as Xiamen, Jinjiang, Shishi and central urban area of Zhangzhou. The influence of urban development on LST is related to the development condition of itself. Compared with Zhangzhou and Quanzhou, NTL has a more significant influence on the LST in Xiamen. The study results provide a scientific guidance for the optimization of thermal environment in the three cities of southern Fujian.

Key words: land surface temperature, thermal environment, urban development, nighttime light, spatial autocorrelation, the three cities of southern Fujian