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dc.contributor.authorNordli, Øyvindeng
dc.contributor.authorLundstad, E.eng
dc.contributor.authorOgilvie, A. E. J.eng
dc.date.accessioned2009-09-18T11:23:01Z
dc.date.available2009-09-18T11:23:01Z
dc.date.issued2007-10eng
dc.identifier.issn0260-3055eng
dc.identifier.urihttp://hdl.handle.net/1956/3475
dc.description.abstractSystematic temperature observations were not undertaken in Norway until the early 19th century, and even then only sporadically. Climate-proxy data may be used to reconstruct temperatures before this period, but until now there have not been any climate proxies available for late winter. This situation has recently changed, as a diary containing historical ice break-up data from a farm near lake Randsfjord in southeastern Norway has been discovered. These data, together with observations from lake Mjøsa in the same region, make it possible to reconstruct temperature back to 1758. The reconstructed series, combined with instrumental series from the area near the lake, were merged into one composite time series covering the period 1758–2006. The lowest temperatures are seen during the Dalton sunspot minimum in the early 19th century. The 20th century was 1.3°C warmer than the 19th century, whereas the 19th century was 0.4°C warmer than the last 43 years of the 18th century. During the period 1758–1850, the mean temperature was 1.4°C lower than the mean value of the 20th century. The warmth observed in the 1990s and at the start of the 21st century is unprecedented during the whole series.en
dc.language.isoengeng
dc.publisherInternational Glaciological Societyeng
dc.titleA late-winter to early-spring temperature reconstruction for southeastern Norway from 1758 to 2006eng
dc.typeJournal articleeng
dc.subject.nsiVDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Meteorologi: 453nob
dc.rights.holderCopyright International Glaciological Society
dc.type.versionpublishedVersioneng
bora.peerreviewedPeer reviewedeng
bora.journalTitleAnnals of Glaciologyeng
bibo.volume46eng
bibo.issue1eng
bibo.pageStart404eng
bibo.pageEnd408eng
bibo.doihttp://dx.doi.org/10.3189/172756407782871657eng
dc.identifier.doi10.3189/172756407782871657


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