• ISSN 1004-0323     CN 62-1099/TP
• 联合主办：中国科学院遥感联合中心
• 中国科学院兰州文献情报中心
• 中国科学院国家空间科学中心
 遥感技术与应用  2020, Vol. 35 Issue (5): 1218-1225    DOI: 10.11873/j.issn.1004-0323.2020.5.1218
 遥感应用

1.中国科学院地理科学与资源研究所 陆地水循环及地表过程重点实验室，北京 100101
2.中国科学院大学，北京 100049
3.首都师范大学 资源环境与旅游学院，北京 100048
Temporal and Spatial Evolvement of Heat Flux in Beijing Under Land Use Change
Menghui Guo1,2(),Ya'nan Ji3,Yinghai Ke3,Shaohui Chen1()
1.Key laboratory of Water Cycle and Related Land Surface Processes，Institute of Geographic Sciences and Natural Resources Research，Chinese Academy of Sciences，Beijing 100101，China
2.University of Chinese Academy of Sciences，Beijing 100049，China
3.College of Resource Environment and Tourism，Capital Normal University，Beijing 100048，China
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Abstract:

Exploring the impact of land use change on urban heat flux has important significance for urban land use planning and urban heat island mitigation. Using the pixel component arranging comparing algorithm， four Beijing surface instantaneous heat fluxes in Septembers of 2004， 2009， 2014 and 2017 are estimated by the surface parameters retrieved from Landsat series data and meteorological reanalysis data， and the spatiotemporal variation of heat fluxes in Beijing is analyzed with the change of land uses during the same period. Results show： （1） the distribution of surface temperature and heat flux in Beijing has obvious spatial heterogeneity， and the difference between mountainous areas and plains and among different land use types in plains is obvious； （2） the order of surface temperatures or heat fluxes between different land use types has consistency at these four moments. For latent heat flux， the highest is 347.85~546.95 W/m2 for forest land， followed by cultivated land and grassland， and the minimum is 225.23~349.03 W/m2 for construction land. For sensible heat flux and surface temperature， the order is reversed， the highest for construction land is 94.06~189.28 W/m2 and 25.18~32.25 ℃， followed by cultivated land and grassland， the lowest is 28.15~102.55 W/m2 and 19.25~28.38 ℃ for water body； （3） in terms of change in urban heat fluxes caused by land use transformation， when natural surface is converted to construction land， latent heat flux is reduced and sensible heat flux increases. The latent heat flux of the arable land around the city is increased by the influence of urban heat radiation， and the urban green space can effectively alleviate urban heat island effect.

Key words: Urban heat flux    Latent heat flux    Sensible heat flux    Land use and change    Remote sensing ET model

 ZTFLH: TP79