Journal
NATURE COMMUNICATIONS
Volume 5, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms5646
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Funding
- Korea Polar Research Institute [PE14010, PN14020, CATER 2012-3061]
- Korea Polar Research Institute Polar Academic Program
- US National Science Foundation Grant [ARC 1107509]
- US Department of Energy Office of Science as part of the Earth System Modeling program
- Department of Energy by the Battelle Memorial Institute [DEAC05-76RLO1830]
- National Science Foundation
- US Department of Energy Office of Science
- Directorate For Geosciences
- Office of Polar Programs (OPP) [1107509] Funding Source: National Science Foundation
- Office of Polar Programs (OPP)
- Directorate For Geosciences [1023592] Funding Source: National Science Foundation
- Korea Evaluation Institute of Industrial Technology (KEIT) [10040097] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- Korea Institute of Marine Science & Technology Promotion (KIMST) [PE14010] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- Korea Meteorological Administration [CATER-2012-3061] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [22A20130012068, 22A20130012323] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Successive cold winters of severely low temperatures in recent years have had critical social and economic impacts on the mid-latitude continents in the Northern Hemisphere. Although these cold winters are thought to be partly driven by dramatic losses of Arctic sea-ice, the mechanism that links sea-ice loss to cold winters remains a subject of debate. Here, by conducting observational analyses and model experiments, we show how Arctic sea-ice loss and cold winters in extra-polar regions are dynamically connected through the polar stratosphere. We find that decreased sea-ice cover during early winter months (November-December), especially over the Barents-Kara seas, enhances the upward propagation of planetary-scale waves with wavenumbers of 1 and 2, subsequently weakening the stratospheric polar vortex in mid-winter (January-February). The weakened polar vortex preferentially induces a negative phase of Arctic Oscillation at the surface, resulting in low temperatures in mid-latitudes.
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