Evidence for external forcing of the Atlantic Multidecadal Oscillation since termination of the Little Ice Age

The Atlantic Multidecadal Oscillation (AMO) represents a significant driver of Northern Hemisphere climate, but the forcing mechanisms pacing the AMO remain poorly understood. Here we use the available proxy records to investigate the influence of solar and volcanic forcing on the AMO over the last...

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Main Authors:	Knudsen, Mads Faurschou, Jacobsen, Bo Holm, Seidenkrantz, Marit-Solveig, Olsen, Jesper
Format:	Online
Language:	English
Published:	Nature Pub. Group 2014
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3948066/

id	pubmed-3948066
recordtype	oai_dc
spelling	pubmed-39480662014-03-10 Evidence for external forcing of the Atlantic Multidecadal Oscillation since termination of the Little Ice Age Knudsen, Mads Faurschou Jacobsen, Bo Holm Seidenkrantz, Marit-Solveig Olsen, Jesper Article The Atlantic Multidecadal Oscillation (AMO) represents a significant driver of Northern Hemisphere climate, but the forcing mechanisms pacing the AMO remain poorly understood. Here we use the available proxy records to investigate the influence of solar and volcanic forcing on the AMO over the last ~450 years. The evidence suggests that external forcing played a dominant role in pacing the AMO after termination of the Little Ice Age (LIA; ca. 1400–1800), with an instantaneous impact on mid-latitude sea-surface temperatures that spread across the North Atlantic over the ensuing ~5 years. In contrast, the role of external forcing was more ambiguous during the LIA. Our study further suggests that the Atlantic Meridional Overturning Circulation is important for linking external forcing with North Atlantic sea-surface temperatures, a conjecture that reconciles two opposing theories concerning the origin of the AMO. Nature Pub. Group 2014-02-25 /pmc/articles/PMC3948066/ /pubmed/24567051 http://dx.doi.org/10.1038/ncomms4323 Text en Copyright © 2014, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by/3.0/ This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. To view a copy of this licence visit http://creativecommons.org/licenses/by/3.0/.
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	Knudsen, Mads Faurschou Jacobsen, Bo Holm Seidenkrantz, Marit-Solveig Olsen, Jesper
spellingShingle	Knudsen, Mads Faurschou Jacobsen, Bo Holm Seidenkrantz, Marit-Solveig Olsen, Jesper Evidence for external forcing of the Atlantic Multidecadal Oscillation since termination of the Little Ice Age
author_facet	Knudsen, Mads Faurschou Jacobsen, Bo Holm Seidenkrantz, Marit-Solveig Olsen, Jesper
author_sort	Knudsen, Mads Faurschou
title	Evidence for external forcing of the Atlantic Multidecadal Oscillation since termination of the Little Ice Age
title_short	Evidence for external forcing of the Atlantic Multidecadal Oscillation since termination of the Little Ice Age
title_full	Evidence for external forcing of the Atlantic Multidecadal Oscillation since termination of the Little Ice Age
title_fullStr	Evidence for external forcing of the Atlantic Multidecadal Oscillation since termination of the Little Ice Age
title_full_unstemmed	Evidence for external forcing of the Atlantic Multidecadal Oscillation since termination of the Little Ice Age
title_sort	evidence for external forcing of the atlantic multidecadal oscillation since termination of the little ice age
description	The Atlantic Multidecadal Oscillation (AMO) represents a significant driver of Northern Hemisphere climate, but the forcing mechanisms pacing the AMO remain poorly understood. Here we use the available proxy records to investigate the influence of solar and volcanic forcing on the AMO over the last ~450 years. The evidence suggests that external forcing played a dominant role in pacing the AMO after termination of the Little Ice Age (LIA; ca. 1400–1800), with an instantaneous impact on mid-latitude sea-surface temperatures that spread across the North Atlantic over the ensuing ~5 years. In contrast, the role of external forcing was more ambiguous during the LIA. Our study further suggests that the Atlantic Meridional Overturning Circulation is important for linking external forcing with North Atlantic sea-surface temperatures, a conjecture that reconciles two opposing theories concerning the origin of the AMO.
publisher	Nature Pub. Group
publishDate	2014
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3948066/
_version_	1612065964579356672

Evidence for external forcing of the Atlantic Multidecadal Oscillation since termination of the Little Ice Age

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