This past summer's heat was an extreme outlier in past 2,000 years
Briefly

Global temperatures have hit record highs every month since June, marking 11 consecutive months of extreme heat. This trend reflects unprecedented warming driven by human activities, making 2023 the hottest year on record and hinting at similar conditions in 2024.
Research by European scientists reveals that the current temperature surge has no parallel in the last 2,000 years in the Northern Hemisphere. Proxy data from various sources confirm that recent warming significantly surpasses any post-ice age trends.
Temperature records depend heavily on modern data collection networks, which lessen in coverage when tracing back in time. Proxies like tree rings and oxygen isotopes provide estimates of pre-instrument era temperatures, showcasing recent exceptional warmth.
Read at Ars Technica
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