The influence of volcanic eruptions on weather regimes over the North Atlantic simulated by ECHAM5/MPI-OM ensemble runs from 800 to 2000 CE
The volcanic fingerprint on the winter North Atlantic atmospheric circulation and climate is analyzed in six ensemble runs of ECHAM5/MPI-OM covering 800–2000 CE, both for equatorial and Northern Hemisphere (NH) eruptions. Large volcanic eruptions influence climate on both annual and decadal time sca...
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Online Access: | https://epic.awi.de/id/eprint/47927/ https://doi.org/10.1016/j.atmosres.2018.04.021 https://hdl.handle.net/10013/epic.0b5395ac-5961-4952-9551-54a8c1589078 |
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ftawi:oai:epic.awi.de:47927 2023-05-15T17:28:26+02:00 The influence of volcanic eruptions on weather regimes over the North Atlantic simulated by ECHAM5/MPI-OM ensemble runs from 800 to 2000 CE Guðlaugsdóttir, Hera Steen-Larsen, Hans Christian Sjolte, Jesper Masson-Delmotte, Valerie Werner, Martin Sveinbjörnsdóttir, Árny Erla 2018-06-02 https://epic.awi.de/id/eprint/47927/ https://doi.org/10.1016/j.atmosres.2018.04.021 https://hdl.handle.net/10013/epic.0b5395ac-5961-4952-9551-54a8c1589078 unknown ELSEVIER SCIENCE INC Guðlaugsdóttir, H. , Steen-Larsen, H. C. , Sjolte, J. , Masson-Delmotte, V. , Werner, M. orcid:0000-0002-6473-0243 and Sveinbjörnsdóttir, Á. E. (2018) The influence of volcanic eruptions on weather regimes over the North Atlantic simulated by ECHAM5/MPI-OM ensemble runs from 800 to 2000 CE , Atmospheric Research, 213 , pp. 211-223 . doi:10.1016/j.atmosres.2018.04.021 <https://doi.org/10.1016/j.atmosres.2018.04.021> , hdl:10013/epic.0b5395ac-5961-4952-9551-54a8c1589078 EPIC3Atmospheric Research, ELSEVIER SCIENCE INC, 213, pp. 211-223, ISSN: 0169-8095 Article isiRev 2018 ftawi https://doi.org/10.1016/j.atmosres.2018.04.021 2021-12-24T15:44:06Z The volcanic fingerprint on the winter North Atlantic atmospheric circulation and climate is analyzed in six ensemble runs of ECHAM5/MPI-OM covering 800–2000 CE, both for equatorial and Northern Hemisphere (NH) eruptions. Large volcanic eruptions influence climate on both annual and decadal time scales due to dynamic interactions of different climate components in the Earth's system. It is well known that the North Atlantic Oscillation (NAO) tends to shift towards its positive phase during winter in the first 1–2 years after large tropical volcanic eruptions, causing warming over Europe, but other North Atlantic weather regimes have received less attention. Here we investigate the four dominant weather regimes in the North Atlantic: The negative and positive phase of NAO as well as the Atlantic Ridge, Scandinavian blocking. The volcanic fingerprint is detected as a change in the frequency of occurrence and anomalies in the wind and temperature fields as well as in the sea ice cover. We observe a strong significant increase in the frequency of Atlantic Ridge in the second year after equatorial eruptions that precede the NAO+ detected in year 3–5 as a result of a strong zonal wind anomalies in year 1–2. Evidence for a stronger polar vortex is detected in years 12–14 where NAO+ is detected both as a frequency increase and in the wind and temperature fields. A short-term response is also detected 2–4 years after NH eruptions. The longterm signal after NH eruptions indicate a weak polar vortex around a decade after an eruption. Although the signal after NH eruptions is weaker our results stress the need for further studies. The simulated atmospheric response recorded in ECHAM5 after volcanic eruptions suggest a more dynamic response than previously thought. The methodology used can also be applied to other forcing scenario, for example for future climate projections where the aim is to search for a long-term climate signal. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Sea ice Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Atmospheric Research 213 211 223 |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
The volcanic fingerprint on the winter North Atlantic atmospheric circulation and climate is analyzed in six ensemble runs of ECHAM5/MPI-OM covering 800–2000 CE, both for equatorial and Northern Hemisphere (NH) eruptions. Large volcanic eruptions influence climate on both annual and decadal time scales due to dynamic interactions of different climate components in the Earth's system. It is well known that the North Atlantic Oscillation (NAO) tends to shift towards its positive phase during winter in the first 1–2 years after large tropical volcanic eruptions, causing warming over Europe, but other North Atlantic weather regimes have received less attention. Here we investigate the four dominant weather regimes in the North Atlantic: The negative and positive phase of NAO as well as the Atlantic Ridge, Scandinavian blocking. The volcanic fingerprint is detected as a change in the frequency of occurrence and anomalies in the wind and temperature fields as well as in the sea ice cover. We observe a strong significant increase in the frequency of Atlantic Ridge in the second year after equatorial eruptions that precede the NAO+ detected in year 3–5 as a result of a strong zonal wind anomalies in year 1–2. Evidence for a stronger polar vortex is detected in years 12–14 where NAO+ is detected both as a frequency increase and in the wind and temperature fields. A short-term response is also detected 2–4 years after NH eruptions. The longterm signal after NH eruptions indicate a weak polar vortex around a decade after an eruption. Although the signal after NH eruptions is weaker our results stress the need for further studies. The simulated atmospheric response recorded in ECHAM5 after volcanic eruptions suggest a more dynamic response than previously thought. The methodology used can also be applied to other forcing scenario, for example for future climate projections where the aim is to search for a long-term climate signal. |
format |
Article in Journal/Newspaper |
author |
Guðlaugsdóttir, Hera Steen-Larsen, Hans Christian Sjolte, Jesper Masson-Delmotte, Valerie Werner, Martin Sveinbjörnsdóttir, Árny Erla |
spellingShingle |
Guðlaugsdóttir, Hera Steen-Larsen, Hans Christian Sjolte, Jesper Masson-Delmotte, Valerie Werner, Martin Sveinbjörnsdóttir, Árny Erla The influence of volcanic eruptions on weather regimes over the North Atlantic simulated by ECHAM5/MPI-OM ensemble runs from 800 to 2000 CE |
author_facet |
Guðlaugsdóttir, Hera Steen-Larsen, Hans Christian Sjolte, Jesper Masson-Delmotte, Valerie Werner, Martin Sveinbjörnsdóttir, Árny Erla |
author_sort |
Guðlaugsdóttir, Hera |
title |
The influence of volcanic eruptions on weather regimes over the North Atlantic simulated by ECHAM5/MPI-OM ensemble runs from 800 to 2000 CE |
title_short |
The influence of volcanic eruptions on weather regimes over the North Atlantic simulated by ECHAM5/MPI-OM ensemble runs from 800 to 2000 CE |
title_full |
The influence of volcanic eruptions on weather regimes over the North Atlantic simulated by ECHAM5/MPI-OM ensemble runs from 800 to 2000 CE |
title_fullStr |
The influence of volcanic eruptions on weather regimes over the North Atlantic simulated by ECHAM5/MPI-OM ensemble runs from 800 to 2000 CE |
title_full_unstemmed |
The influence of volcanic eruptions on weather regimes over the North Atlantic simulated by ECHAM5/MPI-OM ensemble runs from 800 to 2000 CE |
title_sort |
influence of volcanic eruptions on weather regimes over the north atlantic simulated by echam5/mpi-om ensemble runs from 800 to 2000 ce |
publisher |
ELSEVIER SCIENCE INC |
publishDate |
2018 |
url |
https://epic.awi.de/id/eprint/47927/ https://doi.org/10.1016/j.atmosres.2018.04.021 https://hdl.handle.net/10013/epic.0b5395ac-5961-4952-9551-54a8c1589078 |
genre |
North Atlantic North Atlantic oscillation Sea ice |
genre_facet |
North Atlantic North Atlantic oscillation Sea ice |
op_source |
EPIC3Atmospheric Research, ELSEVIER SCIENCE INC, 213, pp. 211-223, ISSN: 0169-8095 |
op_relation |
Guðlaugsdóttir, H. , Steen-Larsen, H. C. , Sjolte, J. , Masson-Delmotte, V. , Werner, M. orcid:0000-0002-6473-0243 and Sveinbjörnsdóttir, Á. E. (2018) The influence of volcanic eruptions on weather regimes over the North Atlantic simulated by ECHAM5/MPI-OM ensemble runs from 800 to 2000 CE , Atmospheric Research, 213 , pp. 211-223 . doi:10.1016/j.atmosres.2018.04.021 <https://doi.org/10.1016/j.atmosres.2018.04.021> , hdl:10013/epic.0b5395ac-5961-4952-9551-54a8c1589078 |
op_doi |
https://doi.org/10.1016/j.atmosres.2018.04.021 |
container_title |
Atmospheric Research |
container_volume |
213 |
container_start_page |
211 |
op_container_end_page |
223 |
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1766121088396296192 |