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Jesper Sjolte

Jesper Sjolte

Forskare

Jesper Sjolte

Major Differences in Regional Climate Impact Between High- and Low-Latitude Volcanic Eruptions

Författare

  • Jesper Sjolte
  • Florian Adolphi
  • Hera Guðlaugsdòttir
  • Raimund Muscheler

Summary, in English

Major low-latitude volcanic eruptions cool Earth’s climate, and can lead to a positive phase of the North Atlantic Oscillation (NAO) during winter. However, the question of the climate and circulation impact of Northern Hemisphere high-latitude eruptions has received less attention. Here we show that, contrary to low-latitude eruptions, the response to high-latitude eruptions can be associated with negative NAO both winter and summer. We furthermore demonstrate that also the response to low-latitude eruptions prevails during summer months, and corroborates previous findings of an extended impact on winter circulation lasting up to 5 years. Our analysis of novel climate field reconstructions supports this extended response, with the addition of showing a positive NAO during summer after low-latitude eruptions. The differences in the effect of high- and low-latitude eruptions on atmospheric circulation and regional temperature provide important insights for the understanding of past and future climate changes in response to volcanic forcing.

Avdelning/ar

  • Kvartärgeologi
  • MERGE: ModElling the Regional and Global Earth system
  • BECC: Biodiversity and Ecosystem services in a Changing Climate

Publiceringsår

2021

Språk

Engelska

Publikation/Tidskrift/Serie

Geophysical Research Letters

Volym

48

Issue

8

Dokumenttyp

Artikel i tidskrift

Förlag

American Geophysical Union (AGU)

Ämne

  • Earth and Related Environmental Sciences

Nyckelord

  • North Atlantic Oscillation
  • regional climate
  • seasonal climate reconstructions
  • volcanic eruptions

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0094-8276