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New insights on Arctic Quaternary climate variability from palaeo-records and numerical modelling
Stockholm Univ, Dept Geol Sci, S-10691 Stockholm, Sweden..ORCID-id: 0000-0002-9033-3559
Univ Durham, Dept Geog, Durham DH1 3LE, England..
Univ Iceland, Fac Earth Sci, IS-101 Reykjavik, Iceland..
Univ Copenhagen, Nat Hist Museum, Ctr GeoGenet, DK-1350 Copenhagen, Denmark..ORCID-id: 0000-0002-8871-5179
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2010 (engelsk)Inngår i: Quaternary Science Reviews, ISSN 0277-3791, E-ISSN 1873-457X, Vol. 29, nr 25-26, s. 3349-3358Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Terrestrial and marine geological archives in the Arctic contain information on environmental change through Quaternary interglacial-glacial cycles. The Arctic Palaeoclimate and its Extremes (APEX) scientific network aims to better understand the magnitude and frequency of past Arctic climate variability, with focus on the "extreme" versus the "normal" conditions of the climate system. One important motivation for studying the amplitude of past natural environmental changes in the Arctic is to better understand the role of this region in a global perspective and provide base-line conditions against which to explore potential future changes in Arctic climate under scenarios of global warming. In this review we identify several areas that are distinct to the present programme and highlight some recent advances presented in this special issue concerning Arctic palaeo-records and natural variability, including spatial and temporal variability of the Greenland Ice Sheet, Arctic Ocean sediment stratigraphy, past ice shelves and marginal marine ice sheets, and the Cenozoic history of Arctic Ocean sea ice in general and Holocene oscillations in sea ice concentrations in particular. The combined sea ice data suggest that the seasonal Arctic sea ice cover was strongly reduced during most of the early Holocene and there appear to have been periods of ice free summers in the central Arctic Ocean. This has important consequences for our understanding of the recent trend of declining sea ice, and calls for further research on causal links between Arctic climate and sea ice. (C) 2010 Elsevier Ltd. All rights reserved.

sted, utgiver, år, opplag, sider
2010. Vol. 29, nr 25-26, s. 3349-3358
HSV kategori
Forskningsprogram
SWEDARCTIC 2007, LOMROG
Identifikatorer
URN: urn:nbn:se:polar:diva-2395DOI: 10.1016/j.quascirev.2010.08.016ISI: 000284724400001OAI: oai:DiVA.org:polar-2395DiVA, id: diva2:859122
Tilgjengelig fra: 2015-10-06 Laget: 2015-10-06 Sist oppdatert: 2017-12-01

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