Volcanic impact on the Atlantic Ocean over the last millennium
The oceanic response to volcanic eruptions over the last 1000 years is investigated with a focus on the North Atlantic Ocean, using a fully coupled AOGCM forced by a realistic time series of volcanic eruptions, total solar irradiance (TSI) and atmospheric greenhouse gases concentration. The model si...
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ftdoajarticles:oai:doaj.org/article:81d7c9aa83ce437ba6ba1ffe46b2bcfe 2023-05-15T17:34:06+02:00 Volcanic impact on the Atlantic Ocean over the last millennium J. Mignot M. Khodri C. Frankignoul J. Servonnat 2011-12-01T00:00:00Z https://doi.org/10.5194/cp-7-1439-2011 https://doaj.org/article/81d7c9aa83ce437ba6ba1ffe46b2bcfe EN eng Copernicus Publications http://www.clim-past.net/7/1439/2011/cp-7-1439-2011.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-7-1439-2011 1814-9324 1814-9332 https://doaj.org/article/81d7c9aa83ce437ba6ba1ffe46b2bcfe Climate of the Past, Vol 7, Iss 4, Pp 1439-1455 (2011) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2011 ftdoajarticles https://doi.org/10.5194/cp-7-1439-2011 2022-12-31T12:15:57Z The oceanic response to volcanic eruptions over the last 1000 years is investigated with a focus on the North Atlantic Ocean, using a fully coupled AOGCM forced by a realistic time series of volcanic eruptions, total solar irradiance (TSI) and atmospheric greenhouse gases concentration. The model simulates little response to TSI variations but a strong and long-lasting thermal and dynamical oceanic adjustment to volcanic forcing, which is shown to be a function of the time period of the volcanic eruptions. The thermal response consists of a fast tropical cooling due to the radiative forcing by the volcanic eruptions, followed by a penetration of this cooling in the subtropical ocean interior one to five years after the eruption, and propagation of the anomalies toward the high latitudes. The oceanic circulation first adjusts rapidly to low latitude anomalous wind stress induced by the strong cooling. The Atlantic Meridional Overturning Circulation (AMOC) shows a significant intensification 5 to 10 years after the eruptions of the period post-1400 A.D., in response to anomalous atmospheric momentum forcing, and a slight weakening in the following decade. In response to the stronger eruptions occurring between 1100 and 1300, the AMOC shows no intensification and a stronger reduction after 10 years. This study thus stresses the diversity of AMOC response to volcanic eruptions in climate models and discusses possible explanations. Article in Journal/Newspaper North Atlantic Directory of Open Access Journals: DOAJ Articles Climate of the Past 7 4 1439 1455 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 J. Mignot M. Khodri C. Frankignoul J. Servonnat Volcanic impact on the Atlantic Ocean over the last millennium |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
The oceanic response to volcanic eruptions over the last 1000 years is investigated with a focus on the North Atlantic Ocean, using a fully coupled AOGCM forced by a realistic time series of volcanic eruptions, total solar irradiance (TSI) and atmospheric greenhouse gases concentration. The model simulates little response to TSI variations but a strong and long-lasting thermal and dynamical oceanic adjustment to volcanic forcing, which is shown to be a function of the time period of the volcanic eruptions. The thermal response consists of a fast tropical cooling due to the radiative forcing by the volcanic eruptions, followed by a penetration of this cooling in the subtropical ocean interior one to five years after the eruption, and propagation of the anomalies toward the high latitudes. The oceanic circulation first adjusts rapidly to low latitude anomalous wind stress induced by the strong cooling. The Atlantic Meridional Overturning Circulation (AMOC) shows a significant intensification 5 to 10 years after the eruptions of the period post-1400 A.D., in response to anomalous atmospheric momentum forcing, and a slight weakening in the following decade. In response to the stronger eruptions occurring between 1100 and 1300, the AMOC shows no intensification and a stronger reduction after 10 years. This study thus stresses the diversity of AMOC response to volcanic eruptions in climate models and discusses possible explanations. |
format |
Article in Journal/Newspaper |
author |
J. Mignot M. Khodri C. Frankignoul J. Servonnat |
author_facet |
J. Mignot M. Khodri C. Frankignoul J. Servonnat |
author_sort |
J. Mignot |
title |
Volcanic impact on the Atlantic Ocean over the last millennium |
title_short |
Volcanic impact on the Atlantic Ocean over the last millennium |
title_full |
Volcanic impact on the Atlantic Ocean over the last millennium |
title_fullStr |
Volcanic impact on the Atlantic Ocean over the last millennium |
title_full_unstemmed |
Volcanic impact on the Atlantic Ocean over the last millennium |
title_sort |
volcanic impact on the atlantic ocean over the last millennium |
publisher |
Copernicus Publications |
publishDate |
2011 |
url |
https://doi.org/10.5194/cp-7-1439-2011 https://doaj.org/article/81d7c9aa83ce437ba6ba1ffe46b2bcfe |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Climate of the Past, Vol 7, Iss 4, Pp 1439-1455 (2011) |
op_relation |
http://www.clim-past.net/7/1439/2011/cp-7-1439-2011.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-7-1439-2011 1814-9324 1814-9332 https://doaj.org/article/81d7c9aa83ce437ba6ba1ffe46b2bcfe |
op_doi |
https://doi.org/10.5194/cp-7-1439-2011 |
container_title |
Climate of the Past |
container_volume |
7 |
container_issue |
4 |
container_start_page |
1439 |
op_container_end_page |
1455 |
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1766132820401455104 |