Major Differences in Regional Climate Impact Between High- and Low-Latitude Volcanic Eruptions
Abstract 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...
| Published in: | Geophysical Research Letters |
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| Main Authors: | , , , |
| Format: | Article in Journal/Newspaper |
| Language: | unknown |
| Published: |
John Wiley & Sons, Ltd
2021
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| Subjects: | |
| Online Access: | https://epic.awi.de/id/eprint/55801/ https://epic.awi.de/id/eprint/55801/1/Sjolte_2021.pdf https://doi.org/10.1029/2020GL092017 https://hdl.handle.net/10013/epic.60f17e0d-6256-4cc7-b3cb-26646fce00e5 |
| Summary: | Abstract 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. |
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