articleNature CommunicationsJan 4, 2019GOLD OA

Arctic amplification is caused by sea-ice loss under increasing CO2

ADAiguo DaiDLDehai LuoMSMirong SongJLJiping Liu

University at Albany, State University of New York · Chinese Academy of Sciences · +1 more institution

PubMed
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Abstract

Abstract Warming in the Arctic has been much faster than the rest of the world in both observations and model simulations, a phenomenon known as the Arctic amplification (AA) whose cause is still under debate. By analyzing data and model simulations, here we show that large AA occurs only from October to April and only over areas with significant sea-ice loss. AA largely disappears when Arctic sea ice is fixed or melts away. Periods with larger AA are associated with larger sea-ice loss, and models with bigger sea-ice loss produce larger AA. Increased outgoing longwave radiation and heat fluxes from the newly opened waters cause AA, whereas all other processes can only indirectly contribute to AA by melting…

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Topics & keywords

Topics
Keywords
  • Sea ice
  • Arctic
  • Arctic ice pack
  • Ice-albedo feedback
  • Arctic sea ice decline
  • Arctic geoengineering
  • Climatology
  • Environmental science
UN Sustainable Development Goals
  • Life below water
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