Climate of the Past
Climate of the Past
CP
Articles | Volume 18, issue 7
Articles | Volume 18, issue 7
https://doi.org/10.5194/cp-18-1601-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/cp-18-1601-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 18, issue 7
Research article
 | 
12 Jul 2022
Research article |  | 12 Jul 2022

Was there a volcanic-induced long-lasting cooling over the Northern Hemisphere in the mid-6th–7th century?

Evelien van Dijk, Johann Jungclaus, Stephan Lorenz, Claudia Timmreck, and Kirstin Krüger

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Short summary
A double volcanic eruption in 536 and 540 CE caused one of the coldest decades during the last 2000 years. We analyzed new climate model simulations from that period and found a cooling of up to 2°C and a sea-ice extent up to 200 km further south. Complex interactions between sea ice and ocean circulation lead to a reduction in the northward ocean heat transport, which makes the sea ice extend further south; this in turn leads to a surface cooling up to 20 years after the eruptions.
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Interdisciplinary studies of volcanic impacts on climate and...