(Article of periodic en Anglais - 2011)

Document title

Paleoclimatological evidence for unprecedented recent temperature rise at the extratropical part of the northern hemisphere

Authors(s) and Affiliation(s)

OGURTSOV M.G. (1 2) ; JUNGNER H. (3) ; HELAMA S. (4) ; LINDHOLM M. (5) ; OINONEN M. (3) ;
(1) A.F. Ioffe Physical-Technical Inst., St. Petersburg, RUSSIE, FEDERATION DE
(2) Central Astronomical Observatory at Pulkovo, St Petersburg, RUSSIE, FEDERATION DE
(3) Dating Lab., Univ., Helsinki, FINLANDE
(4) Arcic Centre, Univ. of Lapland, Rovaniemi, FINLANDE
(5) Metla, Rovaniemi, FINLANDE


Eight, millennial-scale proxy reconstructions of temperature of the Northern Hemisphere were compared to instrumentally measured temperatures. The effect of anomalous reduction in sensitivity (ARS) over the last decades (divergence) in the tree-ring based records was taken into account. Statistical analyses showed that in the extratropical part of the Northern Hemisphere the time period 1988–2008 was the warmest two decades within the last 1000 years and had a probability of more than 0.70. The established exceptional level of current temperature changes over those areas that were the least disturbed by local anthropogenic impact indicates that over the last two decades the climatic system was perturbed by an additional global-scale forcing factor, which had not operated in the past


Article of periodic

published at : Geografiska annaler. Series A. Physical geography / ISSN 0435-3676 / CODEN GAPGAP

Editor : Svenska sällskapet för antropologi och geografi, Stockholm - SUEDE (1965)

Millesime : 2011, vol. 93, no1 [pp. 17-26]

Bibliographic references : 30 ref.

Collation : 6 fig., 1 tabl.




Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1111/j.1468-0459.2011.00002.x

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2011
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