Sea-ice free Arctic contributes to the projected warming minimum in the North Atlantic

Projected global warming is not spatially uniform and one of the minima in warming occurs in the North Atlantic (NA). Several models from the Coupled Model Intercomparison Project Phase 5 even projected a slight NA cooling in 2081-2100 relative to 1986-2005. Here we show that, by our simulations per...

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Bibliographic Details
Published in:Environmental research letters 2017-07, Vol.12 (7), p.74004
Main Authors: Suo, Lingling, Gao, Yongqi, Guo, Dong, Bethke, Ingo
Format: Article
Language:English
Subjects:
AMOC weakening
atmosphere-ocean interaction
Climate change
Climate models
Global warming
North Atlantic warming minimum
regional climate change
Sea ice
sea-ice free Arctic
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Summary:Projected global warming is not spatially uniform and one of the minima in warming occurs in the North Atlantic (NA). Several models from the Coupled Model Intercomparison Project Phase 5 even projected a slight NA cooling in 2081-2100 relative to 1986-2005. Here we show that, by our simulations performed with the Bergen Climate Model (BCM), an autumn (September to November) sea-ice free Arctic (SIF) contributes to the NA warming minimum by weakening the Atlantic meridional overturning circulation (AMOC). The role of the air-sea interaction in the response to the SIF, which has not been widely discussed in the literature, has been highlighted by the results presented in this study.
ISSN:1748-9326
1748-9326
DOI:10.1088/1748-9326/aa6a5e