Research

Urban heat islands monitoring at Espace Saint-Luc in Magog

Monitoring dashboard

Please select a date between 2021-06-01 and 2026-01-08
75 %
Loading layer
Temperature of each area for the selected layer (number of sensors)
0 - 100 m (5) 100 - 200 m (2) 200 - 300 m (2) 300 - 400 m (1)
Max N/D N/D N/D N/D
Avg N/D N/D N/D N/D

  • Select a date and a time in the bar above the map. The default value is the latest temperature sent by the sensors.
  • If the time you want isn't available, it might be due to a sensor failure. Look at the LoRa section for more info.
  • The colour and the opacity is only for the visual effect, it doesn't change the values or the analysis.
  • You can toggle the layers on and off with the icon in the top right corner of the map.
  • You can zoom in and out of the map with the wheel of your mouse or the icon in the top left corner of the map.

    • This monitoring project, financed by Climat Municipalité 2, is part of the greening of the 520 rue Saint-Luc in Magog. The first phase that unfolds in 2021 consists to decontaminate the site, carry out public consultations and work with various stakeholders to create the development plans.

    If everything goes well, works should start in 2022 and end by 2023. A significant tree plantation covering 20 000 m2 will provide a cooling island directly on site and in the nearing neighborhood.

    In order to measure with precision this cooling effect, 10 sensors using the LoRa technology have been installed in various places to provide real-time data that you can look at in the dashboard above. This project will continue beyond the end of the works, because as trees will mature, the cooling effect should increase. Researchers from Université de Sherbrooke, will make an in-depth analysis of that data. Pictures of the site evolution are below.

    Spring 2021

    Summer 2021 summary results

    In order to evaluate the urban heat island phenomenon in the neighborhood, the temperature from the sensors have been compared to the Environment Canada (EC) meteorological station located near Lac Memphrémagog.

    The highest temperature registered by a sensor was 39.7 °C and the biggest difference between a sensor and the EC station was 11.7 °C. In average, the mean temperature difference between the highest value of a sensor and the EC station during the day (7 to 19h) was 4.9 °C and the lowest one was 1.3 °C. For the afternoon (12 to 17h), those numbers were respectively of 5.5 °C and 2.1 °C. The table below summarize the result for each study zone.

    Study zones for urban heat island
    Mean temperature difference between the EC station and the sensors
    Day (7 to 19h) Afternoon (12 to 17h)
    Zone between 0 and 100 metres 2.7 °C 3.5 °C
    Zone between 100 and 200 metres 2.6 °C 3.2 °C
    Zone between 200 and 300 metres 3.2 °C 3.7 °C
    Zone between 300 and 400 metres 3.5 °C 3.8 °C
    All sensors 2.9 °C 3.5 °C
    Maps below have been produced by interpolating the difference between the sensor’s temperature and the EC station’s temperature by using the cubic spline method. The exercise has been done for different base temperatures registered at the EC station (20 °C, 25 °C, 30 °C and the worst case of the summer with a temperature difference of 11.7 °C). It’s possible to notice a trend that shows the higher the temperature, the more significant the difference. Hence in a climate change future where temperatures will be higher, it is crucial to mitigate the urban heat island effect, which is the goal of this greening project.
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    Partner organizations for this project

    A big thanks to Magog City and everyone who works there. This project would not have been possible without their tremendous support.

    This project has received a grant from Climat municipalités - Phase 2 from the Quebec government and meet the objectives for the 2030 Plan for a Green Economy.

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