Journal
NATURE COMMUNICATIONS
Volume 9, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-018-05256-8
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Funding
- German Federal Ministry of Education and Research (BMBF) [01LP1611A]
- Netherlands Organisation for Scientific Research (NWO) [016.Vidi.171011]
- U.S. Department of Energy Office of Science, Biological and Environmental Research program (BER) [DESC0016605]
- Utah Agricultural Experiment Station, Utah State University
- Central Weather Bureau of Taiwan
- U.S. National Science Foundation [PLR-1304398, AGS-1640452]
- NASA [80NSSC17K0267]
- NSF [AGS-1552385]
- Harvard Global Institute
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Accelerated warming in the Arctic, as compared to the rest of the globe, might have profound impacts on mid-latitude weather. Most studies analyzing Arctic links to mid-latitude weather focused on winter, yet recent summers have seen strong reductions in sea-ice extent and snow cover, a weakened equator-to-pole thermal gradient and associated weakening of the mid-latitude circulation. We review the scientific evidence behind three leading hypotheses on the influence of Arctic changes on mid-latitude summer weather: Weakened storm tracks, shifted jet streams, and amplified quasi-stationary waves. We show that interactions between Arctic teleconnections and other remote and regional feedback processes could lead to more persistent hot-dry extremes in the mid-latitudes. The exact nature of these non-linear interactions is not well quantified but they provide potential high-impact risks for society.
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