Articles | Volume 10, issue 3
https://doi.org/10.5194/esd-10-569-2019
https://doi.org/10.5194/esd-10-569-2019
Research article
 | 
23 Sep 2019
Research article |  | 23 Sep 2019

Arctic amplification under global warming of 1.5 and 2 °C in NorESM1-Happi

Lise S. Graff, Trond Iversen, Ingo Bethke, Jens B. Debernard, Øyvind Seland, Mats Bentsen, Alf Kirkevåg, Camille Li, and Dirk J. L. Olivié

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Short summary
Differences between a 1.5 and a 2.0 °C warmer global climate than 1850 conditions are discussed based on a suite of global atmosphere-only, fully coupled, and slab-ocean runs with the Norwegian Earth System Model. Responses, such as the Arctic amplification of global warming, are stronger with the fully coupled and slab-ocean configurations. While ice-free Arctic summers are rare under 1.5 °C warming in the slab-ocean runs, they are estimated to occur 18 % of the time under 2.0 °C warming.
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