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Long-Term Climate Trends and Extreme Events in Northern Fennoscandia (1914-2013)
Responsible organisation
2017 (English)In: Climate, ISSN 2053-7565, E-ISSN 2225-1154, Vol. 5, no 1Article in journal (Refereed) Published
Abstract [en]

We studied climate trends and the occurrence of rare and extreme temperature and precipitation events in northern Fennoscandia in 1914-2013. Weather data were derived from nine observation stations located in Finland, Norway, Sweden and Russia. The results showed that spring and autumn temperatures and to a lesser extent summer temperatures increased significantly in the study region, the observed changes being the greatest for daily minimum temperatures. The number of frost days declined both in spring and autumn. Rarely cold winter, spring, summer and autumn seasons had a low occurrence and rarely warm spring and autumn seasons a high occurrence during the last 20-year interval (1994-2013), compared to the other 20-year intervals. That period was also characterized by a low number of days with extremely low temperature in all seasons (4%-9% of all extremely cold days) and a high number of April and October days with extremely high temperature (36%-42% of all extremely warm days). A tendency of exceptionally high daily precipitation sums to grow even higher towards the end of the study period was also observed. To summarize, the results indicate a shortening of the cold season in northern Fennoscandia. Furthermore, the results suggest significant declines in extremely cold climate events in all seasons and increases in extremely warm climate events particularly in spring and autumn seasons.

Place, publisher, year, edition, pages
2017. Vol. 5, no 1
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:polar:diva-3932DOI: 10.3390/cli5010016OAI: oai:DiVA.org:polar-3932DiVA, id: diva2:1165980
Available from: 2017-12-14 Created: 2017-12-14 Last updated: 2017-12-14

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