EGU23-6744, updated on 25 Feb 2023
EGU General Assembly 2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

The interactions between the summer urban heat islands and heatwaves in Beijing: from past to future 

Fengqi Cui1,2, Rafiq Hamdi2, Piet Termonia2, and Philippe De Maeyer1
Fengqi Cui et al.
  • 1Ghent Univeristy, department of Geography, Gent, Belgium, Belgium (
  • 2Royal Meteorological Institute, Brussels, Belgium

The coexistence of urban heat islands (UHIs) and heatwaves (HWs) enhances the stress on human society. However, how UHIs responds to the HWs and the interaction mechanisms between the UHIs and HWs in historical period and under different global warming levels (GWL) 1.5 ºC and 2 ºC scenarios are still elusive. In this study, the regional climate model ALARO-SURFEX (incorporated with LCZs) will be firstly used to estimate the historical interactions between the UHI and HW and the contribution of urbanization to the HWs in Beijing. The intensifying impact of three HWs (daytime HW, nighttime HWs, compound HW) on the UHI will be analyzed, and its energy mechanism will also be revealed. Secondly, the ensembled EAS-CORDEX data calibrated by adding hourly urban signatures will be used to force the offline SURFEX model to project the future urban climate in Beijing. The HW duration, frequency, and intensity will be estimated, and the UHI intensity and pattern will be investigated before, during, and after three kinds of HWs under different warming levels (GWL1.5 and GWL2). Understanding the interaction mechanisms of HWs and UHIs, as well as projecting for HWs and UHIs under the Paris Agreement, would be beneficial for stakeholders and city planners in developing future local adaptation policies.

How to cite: Cui, F., Hamdi, R., Termonia, P., and De Maeyer, P.: The interactions between the summer urban heat islands and heatwaves in Beijing: from past to future , EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-6744,, 2023.