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Atmospheric circulation and its impact on ice phenology in Scandinavia
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL. (Miljöanalys)
Dep. of Ecology and Systematic, University of Helsinki.
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
2004 (English)In: Boreal environment research, ISSN 1239-6095, Vol. 9, no 5, 371-380 p.Article in journal (Refereed) Published
Abstract [en]

Atmospheric circulation is important in affecting surface climate and ecosystems. In this study, we compared the impact of north-atlantic and regional atmospheric circulation, as represented by the North Atlantic Oscillation (NAO) index and a set of regional circulation indices, on ice phenology of 50 Scandinavian lakes. Both ice freeze and ice break-up dates were coherent over the whole region and were significantly correlated with both types of circulation indices. Correlations were especially strong for regional circulation indices. The application of regional indices, here for the first time related with ice data over a large area, allowed the determination of the type (i.e. meridional/ zonal wind and cyclonic/anticyclonic conditions) of atmospheric circulation influencing the ice phenology. The results suggest that regional circulation indices are very useful tools, in addition to global circulation, to improve the understanding of the interaction between ecosystem processes and climate.

Place, publisher, year, edition, pages
2004. Vol. 9, no 5, 371-380 p.
Keyword [en]
atmospheric circulation, ice, NAO, lakes
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:uu:diva-72451OAI: oai:DiVA.org:uu-72451DiVA: diva2:100362
Available from: 2005-05-23 Created: 2005-05-23 Last updated: 2012-04-13Bibliographically approved

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Blenckner, ThorstenWeyhenmeyer, Gesa A.

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