Roughly 500,000 deaths yearly are attributed to excessive warmth, a disaster intensified by the city warmth island impact, which causes metropolitan areas to heat at double the worldwide common. Earlier this month, record-breaking warmth waves throughout Western Europe pushed temperatures previous 40°C (104°F). The prevalence of heat-trapping supplies, like darkish pavements and roofs, mixed with a scarcity of vegetation, largely drives this localized warming. Warmth mitigation measures are essential to lowering this toll, and funky roofs supply a extremely cost-effective answer. By rising rooftop reflectivity (albedo), we will considerably scale back the quantity of photo voltaic vitality absorbed by buildings, finally decreasing native floor temperatures and defending susceptible communities.
To deal with this, Google Analysis is constructing AI-driven instruments to assist decrease metropolis temperatures and hold communities protected. By making use of AI to high-resolution satellite tv for pc and aerial imagery, our Warmth Resilience instruments assist cities quantify the affect of focused cooling interventions. In 2024, we piloted this strategy with 14 cities, offering them with rooftop reflectivity knowledge to determine extremely susceptible neighborhoods and decide the place cool roofs would yield the best temperature reductions. This knowledge guided essential choices throughout a number of cities, leading to initiatives corresponding to cool roof ordinances and adaptation plans.
Now, we’re scaling this affect. In “Estimating high-resolution albedo for city functions”, printed in Nature Communications, we element our methodology for mapping building-level reflectivity throughout various city environments. This analysis bridges the hole between common local weather observations and actionable, building-level knowledge. We’re additionally releasing an expanded albedo dataset masking over 50 international cities to empower city planners worldwide to prioritize cool-roof interventions. This dataset is open and accessible by way of our new, high-resolution Warmth Resilience Earth Engine App.
