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Divergent consensuses on Arctic amplification influence on midlatitude severe winter weather

Review article
Authors J. Cohen
X. Zhang
J. Francis
T. Jung
R. Kwok
J. Overland
T. J. Ballinger
U. S. Bhatt
H. W. Chen
D. Coumou
S. Feldstein
H. Gu
D. Handorf
G. Henderson
M. Ionita
M. Kretschmer
F. Laliberte
S. Lee
Hans W. Linderholm
W. Maslowski
Y. Peings
K. Pfeiffer
I. Rigor
T. Semmler
J. Stroeve
P. C. Taylor
S. Vavrus
T. Vihma
S. Wang
M. Wendisch
Y. Wu
J. Yoon
Published in Nature Climate Change
Volume 10
Pages 20–29
ISSN 1758-678X
Publication year 2020
Published at Department of Earth Sciences
Pages 20–29
Language en
Links https://doi.org/10.1038/s41558-019-...
Subject categories Climate Research

Abstract

© 2019, Springer Nature Limited. The Arctic has warmed more than twice as fast as the global average since the late twentieth century, a phenomenon known as Arctic amplification (AA). Recently, there have been considerable advances in understanding the physical contributions to AA, and progress has been made in understanding the mechanisms that link it to midlatitude weather variability. Observational studies overwhelmingly support that AA is contributing to winter continental cooling. Although some model experiments support the observational evidence, most modelling results show little connection between AA and severe midlatitude weather or suggest the export of excess heating from the Arctic to lower latitudes. Divergent conclusions between model and observational studies, and even intramodel studies, continue to obfuscate a clear understanding of how AA is influencing midlatitude weather.

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