Skip to main content

Research Repository

Advanced Search

Investigating links among heatwaves, precipitation, and land use types using the convection-permitting model in the Southwest UK for the 2022 boreal summer

Chun, Kwok; Ezber, Yasemin; Toker, Emir; Reboita, Michelle; Rocha, Rosmeri; Risanto, Bayu; Yetemen, Omer; Octavianti, Thanti; Quinn, Nevil; Sens, Omer; Castro, Christopher

Investigating links among heatwaves, precipitation, and land use types using the convection-permitting model in the Southwest UK for the 2022 boreal summer Thumbnail


Authors

Profile Image

Dr Kwok Chun Kwok.Chun@uwe.ac.uk
Lecturer in Environmental Managment

Yasemin Ezber

Emir Toker

Michelle Reboita

Rosmeri Rocha

Bayu Risanto

Omer Yetemen

Omer Sens

Christopher Castro



Abstract

To improve sub-seasonal forecasts, different global initiatives generate continental convection-permitting simulations for resolution less than 10 kilometres for multiple decades. These simulations, however, are based on land use maps with only single urban type. In this study, we explore how the density and height information of the urban canopy based on Local Climate Zones (LCZs) affect the dynamics among temperatures, precipitation and land use types for the 2022 summer heatwave in the Southwest UK. Four numerical experiments at a 3 km grid are run by switching off the parameterization of deep-convection in the Weather Research and Forecasting (WRF) models. These experiments are based on (i) the no urban scenario, (ii) the default MODIS land use scheme, (iii) the building environment parameterization (BEP), and (iv) the building energy model (BEM).
Results show that the cold advection over the UK led to downward motion according to a Q-vector analysis. The regional downward motion caused the formation of a heat dome. It is against the hypothesis that the 2022 summer heatwave was due to the hot circulation from Spain and equatorial Africa. Even though four land use schemes have similar simulated cold advection across the UK, our findings show that land use types affected water recycling due to local convection differently. These differences were related to the strength of rainstorms at the dissipating heatwave stage. Our results suggest that urban areas were more likely to have more persistent heatwaves since the intensity of rainstorms was affected by the lower local water recycling. This advanced understanding of the UK heatwave mechanism based on regional advection conditions and local convection processes will guide us on how to improve our sub-seasonal forecast in the urban area.

Presentation Conference Type Poster
Start Date Apr 22, 2023
End Date Apr 28, 2023
Deposit Date Apr 29, 2023
Publicly Available Date May 2, 2023
DOI https://doi.org/10.5194/egusphere-egu23-9500
Keywords Convection-Permitting Model (CPM); Sensors; Local Climate Zones; Heat waves; Q-vector; Urban canopy
Public URL https://uwe-repository.worktribe.com/output/10724484
Publisher URL https://meetingorganizer.copernicus.org/EGU23/EGU23-9500.html

Files









You might also like



Downloadable Citations