Acta Geographica Sinica ›› 2023, Vol. 78 ›› Issue (3): 620-639.doi: 10.11821/dlxb202303008

• Climate Change and Land Use • Previous Articles     Next Articles

Spatio-temporal evolution of urbanization and its relationship with regional climate change in Beijing over the past century

YANG Shiqi1,2(), WANG Ji3(), DOU Yinyin1, LUAN Qingzu3, KUANG Wenhui1   

  1. 1. Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China
    2. College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
    3. Beijing Municipal Climate Center, Beijing 100089, China
  • Received:2022-07-20 Revised:2023-03-04 Online:2023-03-25 Published:2023-03-27
  • Contact: WANG Ji E-mail:yangshiqi5023@igsnrr.ac.cn;wangji_zl@163.com
  • Supported by:
    National Natural Science Foundation of China(41871343);Project of Beijing Meteorological Disaster Risk Census in Geospatial Information Product Development and Technical Services(0701-214130210301)

Abstract:

Understanding the mechanisms of regional climate evolution requires extensive research on long-term urbanization and meteorological elements. The various data sources and an interactive interpretation method were utilized to reproduce the urban expansion in Beijing over the past century. The relationship between urban development and regional climate change was then determined by using the moving average method and the Mann-Kendall trend test. We found that the area of urban land in Beijing increased 64.48 times from 1916 to 2020, expanding in a circle around the central region. The rate of urban expansion peaked at 70.12 km2/a between 2000 and 2010. The average annual temperature and precipitation from 1916 to 2020 in Beijing were 12.25 ℃ and 588.6 mm, respectively. The 5-year moving average temperature fluctuated upward by 0.22 ℃/10a over the past century, with a notable warming trend since 1978. Precipitation trended downward at a rate of 9.37 mm/10a. The accelerated expansion of the impervious surface area in the city might lead to urban warming by altering the surface energy balance. The rate of urbanization and the regional temperature rise were positively correlated, with urbanization accounting for 20.83% of the regional warming in Beijing. Changes in the surface energy balance and an increase in air pollution emissions might result in a decline in precipitation. The results provide scientific resources for advancing knowledge of the processes and mechanisms by which urban development influences the regional climate change.

Key words: urban expansion, climate change, long-term scale, spatiotemporal patterns, land use