SUHI analysis using Local Climate Zones—A comparison of 50 cities

Bechtel, Benjamin; Demuzere, M.; Mills , G.; Zhan, W.; Sismanidis, P.; Small, C.; Voogt, J.

doi:10.1016/j.uclim.2019.01.005

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SUHI analysis using Local Climate Zones—A comparison of 50 cities

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引用

Bechtel, B., Demuzere, M., Mills, G., Zhan, W., Sismanidis, P., Small, C., & Voogt, J. (2019). SUHI analysis using Local Climate Zones—A comparison of 50 cities. Urban Climate, 28:. doi:10.1016/j.uclim.2019.01.005.

引用: https://hdl.handle.net/21.11116/0000-0003-EB06-E

要旨

Assessment of surface urban heat islands (SUHI)has been hampered by the lack of a consistent framework to permit consistent interpretation between cities. Local Climate Zones (LCZ)are a universal description of local scale landscape types based on expected variation at neighbourhood scale (≥1km 2 )in and around cities. In this study, we investigate the suitability of the LCZ scheme for SUHI studies based on 50 cities from across the globe. For comparability we use an annual temperature cycle model for MODIS land surface temperature (LST)at different overpass times and multi-year mean Landsat 8 LST. The SUHI analysis shows significant differences in the intra-urban estimate of SUHI for different built LCZ types. Substantial variability of SUHI within LCZ classes and between cities exists and SUHI patterns vary by time of day. Landsat derived estimates have very high correlations to those from MODIS at a similar time. The use of an LCZ approach combined with annual SUHI estimates provides a promising approach for a consistent and comprehensive SUHI analysis framework subject to further work to assess the spatial scale of matching LST and LCZ data, filter for topographic effects, and include the phenological status. © 2019