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Climate Shift: Heat Waves Now "Virtually Impossible" Without Warming
3 Jul
Summary
- Extreme heat and humidity would have been virtually impossible before fossil fuel use.
- Wet bulb globe temperature readings account for humidity, wind, and sunlight.
- Climate change has fundamentally altered the planet's climate conditions.
Scientists have concluded that the recent severe heat and humidity in the Northeast and eastern Canada are the result of a climate "fundamentally different" from the pre-fossil fuel era. According to a team from World Weather Attribution, such prolonged and far-reaching heat waves would have been "virtually impossible" before human-induced warming began.
Emissions from burning fossil fuels have trapped excess heat, raising global temperatures. While hot spells are not new, global warming intensifies them. Researchers analyzed the wet bulb globe temperature, a metric accounting for humidity, wind, and sunlight, to assess climate change's impact.
The analysis indicated that while the week's heat was rare, it would have been effectively impossible before the Industrial Revolution. This finding aligns with previous research by the same group on heat waves in Western Europe, underscoring the profound impact of climate change on extreme weather events.
