Abstract
GEOPHYSICAL RESEARCH LETTERS,
VOL. 36,
L08707,
5 PP., 2009
doi:10.1029/2008GL037079
Influence of low Arctic sea‐ice minima on anomalously cold Eurasian winters
Research Institute for Global Change, Japan Agency for Marine‐Earth Science and Technology, Yokohama, Japan
Research Institute for Global Change, Japan Agency for Marine‐Earth Science and Technology, Yokosuka, Japan
Department of Environmental Systems Science, Doshisha University, Kyotanabe, Japan
Influence of low Arctic sea‐ice minima in early autumn on the wintertime climate over Eurasia is investigated. Observational evidence shows that significant cold anomalies over the Far East in early winter and zonally elongated cold anomalies from Europe to Far East in late winter are associated with the decrease of the Arctic sea‐ice cover in the preceding summer‐to‐autumn seasons. Results from numerical experiments using an atmospheric general circulation model support these notions. The remote response in early winter is regarded as a stationary Rossby wave generated thermally through an anomalous turbulent heat fluxes as a result of anomalous ice‐cover over the Barents‐Kara Seas in late autumn, which tends to induce an amplification of the Siberian high causing colder conditions over the Far East. The late‐winter cold anomalies over Eurasia are also reproduced in our experiment, which is associated with the negative phase of the North Atlantic Oscillation.
Received 18 December 2008; accepted 19 March 2009; published 28 April 2009.
Citation: (2009), Influence of low Arctic sea‐ice minima on anomalously cold Eurasian winters, Geophys. Res. Lett., 36, L08707, doi:10.1029/2008GL037079.
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