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Amplified warming of North American cold extremes linked to human-induced changes in temperature variability

Earth Sciences

Amplified warming of North American cold extremes linked to human-induced changes in temperature variability

R. Blackport and J. C. Fyfe

This study by Russell Blackport and John C. Fyfe reveals that North America's winter cold extremes are warming at an alarming rate, outpacing the winter mean temperatures since 1980. The findings challenge earlier beliefs about cold extremes diminishing, highlighting a critical change in our climate dynamics.

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Playback language: English
Abstract
This study investigates the impact of global warming on North American winter cold extremes. Contrary to previous findings suggesting a reduction in cold extremes due to decreasing temperature variability, the research shows that cold extremes have warmed significantly faster than the winter mean temperature since 1980. This amplified warming is attributed to both decreasing variance and changes in higher moments of the temperature distributions. Climate model simulations support the observed trends, and a detection and attribution analysis confirms the human influence on these changes in variability.
Publisher
Nature Communications
Published On
Jul 12, 2024
Authors
Russell Blackport, John C. Fyfe
Tags
global warming
North America
winter cold extremes
temperature variability
climate models
human influence

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