Aarhus University Seal / Aarhus Universitets segl

B. H. Jacobsen

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

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

DOI

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 similar to 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 similar to 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.

Original languageEnglish
Article number3323
JournalNature Communications
Volume5
Number of pages8
ISSN2041-1723
DOIs
Publication statusPublished - Feb 2014
Externally publishedYes

    Research areas

  • MEDIEVAL WARM PERIOD, NORTH-ATLANTIC, ATMOSPHERIC CIRCULATION, CLIMATE VARIABILITY, SEA, TEMPERATURE, HOLOCENE, RAINFALL, OCEAN, IRRADIANCE

See relations at Aarhus University Citationformats

ID: 141716947