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Identifying a human signal in the North Atlantic warming hole

Earth Sciences

Identifying a human signal in the North Atlantic warming hole

R. Chemke, L. Zanna, et al.

Discover how North Atlantic sea surface temperatures are playing a pivotal role in Northern Hemisphere weather dynamics. This groundbreaking research by Rei Chemke, Laure Zanna, and Lorenzo M. Polvani reveals that the North Atlantic warming hole is anthropogenic, emerging from internal variability and driven by greenhouse gas emissions. Dive into the details of this important climate phenomenon!

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Playback language: English
Abstract
North Atlantic sea surface temperatures significantly impact Northern Hemisphere weather. While the North Atlantic is warming due to greenhouse gases, climate projections show a surprising cooling region at mid-latitudes—the North Atlantic warming hole. This study analyzes climate models and observations to determine if this cooling is anthropogenic or due to internal climate variability. The results indicate the warming hole is anthropogenic, recently emerging from internal variability and attributable to greenhouse gas emissions. A declining northward oceanic heat flux, linked to this pattern, is also found to be anthropogenic.
Publisher
Nature Communications
Published On
Mar 24, 2020
Authors
Rei Chemke, Laure Zanna, Lorenzo M. Polvani
Tags
North Atlantic
sea surface temperatures
warming hole
climate models
greenhouse gas emissions
oceanic heat flux
climate variability
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