🌱 Superherbs against heat stress:

https://friendica.world/display/84b6ef2b-106a-1582-2518-812667386397

Trees Can Halve The Heat Trapped in Cities, But There's a Catch

https://www.sciencealert.com/trees-can-halve-the-heat-trapped-in-cities-but-theres-a-catch

#science #urbanheat #trees

☀️ Albedo vs. Surface Temperature: Why a "Bright" City Isn't Always Cooler

❗ Key findings from the current stage of research:
🔹 Vegetation (NDVI): Based on modeling results, biomass health accounted for approximately 40% of the variance in Calgary’s temperature regime in 2025.
🔹 Albedo (Reflectance): While it is commonly assumed that high surface reflectance reduces heat absorption, satellite data (broadband shortwave albedo) reveals a far more nuanced picture.

🔥 The Seton Anomaly
The scatter plot clearly shows a wide distribution of values. The community of Seton is a particularly striking example: despite its high average albedo (likely due to light-colored soils at construction sites and new roofing materials), the area remains in a "heat zone" (classified as Warm Background in my model).

❗ Albedo plays a role, but it is not the dominant factor in Calgary’s environment.

#Calgary #UrbanHeat #DataScience #ClimateResilience #YYC #Geoscience #CityPlanning #RemoteSensing #RStats #APEGA #GreennesOfCalgary

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