On cold spells in North America and storminess in western Europe
Number of Authors: 3
2016 (English)In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 43, no 12, 6620-6628 p.Article in journal (Refereed) Published
We discuss the dynamical and statistical links between cold extremes over eastern North America and storminess over western Europe, with a focus on the midlatitude jet stream, the North Atlantic Oscillation (NAO) and the Pacific-North American Pattern (PNA). The analysis is performed on the European Centre for Medium-Range Weather Forecasts 20th Century Reanalysis. The large-scale circulation associated with the cold spells corresponds to advection of cold air from the Arctic region into North America and to a very zonal and intense North Atlantic jet, shifted persistently south of its climatological location. These features of the Atlantic jet are conducive to destructive windstorms and intense precipitation over a large part of southern and continental Europe and the British Isles. The cold spells are preceded by a negative NAO and followed by a positive PNA; however, we interpret the associated circulation anomalies as being distinct from these standard modes of climate variability.
Place, publisher, year, edition, pages
2016. Vol. 43, no 12, 6620-6628 p.
Earth and Related Environmental Sciences
IdentifiersURN: urn:nbn:se:su:diva-134175DOI: 10.1002/2016GL069392ISI: 000380910100085OAI: oai:DiVA.org:su-134175DiVA: diva2:1040735