It is a common belief that higher elevations are naturally cooler. In pristine landscapes, this rule holds firm. But what about urban environments? Humanity moves vast amounts of matter and energy, sometimes fundamentally altering the thermodynamic parameters of our habitat.

🛰️ I correlated summer Land Surface Temperature (LST) data across Calgary’s neighborhoods with the Canadian Medium-Resolution Digital Elevation Model (MRDEM). The chart below illustrates the relationship between "Average Elevation" and "Average Surface Temperature" specifically for established residential communities. As observed, this relationship is notably weak, even though a slight cooling trend persists. Based on my data analysis, elevation above sea level is not a key factor in cooling the city.

#Calgary #OpenData #UrbanHeat #DataScience #ClimateAction #YYC #GreennesOfCalgary #ClimateEquity #EnvironmentalEquity #CityPlanning #RemoteSensing #RStats #Landsat #fossgis #DigitalElevationModel

💻 I took several completely independent datasets and "pitted" them against each other. One of the results is shown in this chart: the more "concrete" (roads, buildings, parking lots) my machine learning model identified in a community, the higher the surface temperature recorded by the thermal sensor.

🔥 The result: Data from different sources confirm one another. The difference in surface temperature between "green" and "concrete" residential areas averages 8–10°C throughout the summer. On certain days, this gap is likely even wider.

📉 This chart shows only established residential communities. If industrial zones were included, the trend would be even more dramatic. While modeling errors certainly exist, the overall physical pattern is undeniable.

#Calgary #OpenData #UrbanHeat #LULC #DataScience #ClimateAction #YYC #GreennesOfCalgary #ClimateEquity #EnvironmentalEquity #CityPlanning #MachineLearning #RemoteSensing #RStats #Sentinel1 #Sentinel2 #Landsat #fossgis

How the house and car nexus is destroying biodiversity

"Australian houses are among the largest in the world, averaging 236 square metres of living space"

"Local urban greening outcomes are subjugated to state government housing priorities."

"Driveway area has increased on average by 57% from 29m2 to 46m2."

"Front garden area has reduced on average by 46% from 102m2 to 55m2."

"Redevelopment has reduced canopy cover by 62% at the lot scale."

"Middle-ring suburban Sydney is experiencing a quiet yet profound transformation. As redevelopment accelerates, larger houses with expansive footprints and additional driveways are steadily replacing traditional front yards and gardens. This study examines 370 properties across Northern and Greater Western Sydney to quantify these changes. In areas where older, low-density homes have been replaced by newer, larger detached dwellings, the average front garden area has declined by 46%, while driveways and other impervious surfaces have increased by 57%. Most notably, front yard canopy cover has fallen by 62%. These patterns are not due to a lack of policy, but to a planning system in which local controls have become discretionary under ongoing state-level legislative reforms. Broader social trends toward larger homes and greater car ownership further reinforce this shift. The cumulative effect is leading to a substantial loss of private green space, contributing to higher urban heat, reduced biodiversity, and diminished connections with nature. Urban planning reform is urgently needed to embed minimum standards..."

Death of the front yards: How the house and car is replacing residential gardens >>
https://www.sciencedirect.com/science/article/pii/S0264275126001617

#cars #roads #housing #driveways #sprawl #expansion #MumAndDadDeveloper #UHI #UrbanHeat #gardens #backyard #GreenSpace #UrbanGreening #wildlife #biodiversity #trees #children #SmallLandclearing #UrbanPlanning #FossilFuel #dependency #failure #regulation #suburbia #Australia #culture

Image: Housing cars

Turning gardens into roads - Supersized driveways are shrinking suburban front yards

"...In 30 years time we’ll suddenly wake up and go ‘Where have all our front gardens gone?’..You end up with this hard infrastructure – houses and driveways – that have this incremental dominance of the landscape."

"Tree canopy coverage was reduced by 62% as older houses were demolished and rebuilt."

"In contrast, the footprint of driveways and other artificial surfaces increased by 57% to 46 square metres."

"...Greater car ownership and households increasingly having multiple vehicles had also contributed to the loss of private green space.The loss of private green space contributes to higher urban heat, reduced biodiversity, and fewer connections with nature..." >>
https://www.theguardian.com/australia-news/2026/mar/18/where-have-all-our-front-gardens-gone-sydneys-super-sized-driveways-eat-into-yards

Driveway 'accidents' >>
https://www.abc.net.au/news/search?query=driveway%20accidents

15-minute city
https://en.wikipedia.org/wiki/15-minute_city

#cars #roads #housing #driveways #UHI #UrbanHeat #gardens #backyard #GreenSpace #wildlife #biodiversity #trees #children #SmallLandclearing #UrbanPlanning #FossilFuel #dependency #failure #suburbia #Australia #culture

Image: NSW 'garden' and private toddler playground in suburbia

🌡️ HEAL project featured on Climate Adaptation Stories!

Urban heat islands challenge pedestrian mobility, especially for vulnerable groups. Our HEAL project uses participatory research & data-driven solutions to address heat stress.
The app calculates heat-avoidant routes using real-time sensors, shadow modeling & community input. Now expanding across Europe!

Learn more: https://climate-adapt.eea.europa.eu/en/mission/solutions/mission-stories/enabling-heat-stress-resilient-mobility-with-the-heal-navigation-app-in-germany-story88
Contact us if your city could benefit from heat-resilient routing.
#UrbanHeat #ClimateAdaptation