Holocene climate change in Arctic Canada and Greenland

QUATERNARY SCIENCE REVIEWS

卷:147

Article; Proceedings Paper

Briner, Jason P.¹  McKay, Nicholas P.²  Axford, Yarrow³  Bennike, Ole⁴  Bradley, Raymond S.⁵  de Vernal, Anne⁶  Fisher, David⁷  Francus, Pierre^8,9  Frechette, Bianca⁶  Gajewski, Konrad¹⁰  Jennings, Anne¹¹  Kaufman, Darrell S.²  Miller, Gifford^11,12  Rouston, Cody²  Wagner, Bernd¹³ 

[1] Univ Buffalo, Dept Geol, Buffalo, NY USA

[2] No Arizona Univ, Sch Earth Sci & Environm Sustainabil, Flagstaff, AZ 86011 USA

[3] Northwestern Univ, Dept Earth & Planetary Sci, Evanston, IL 60208 USA

[4] Geol Survey Denmark & Greenland, Copenhagen, Denmark

[5] Univ Massachusetts, Dept Geosci, Amherst, MA 01003 USA

[6] Univ Quebec, Ctr Rech Geochim & Geodynam Geotop, Montreal, PQ, Canada

[7] Univ Ottawa, Dept Geol, Ottawa, ON K1N 6N5, Canada

[8] Inst Natl Rech Sci, Ctr Eau Terre Environm, Quebec City, PQ G1K 9A9, Canada

[9] GEOTOP Res Ctr, Montreal, PQ H3C 3P8, Canada

[10] Univ Ottawa, Dept Geog Environm & Geomat, Ottawa, ON K1N 6N5, Canada

[11] Univ Colorado, Inst Arctic & Alpine Res, Boulder, CO 80309 USA

[12] Univ Colorado, Dept Geol Sci, Boulder, CO 80309 USA

[13] Univ Cologne, Inst Geol & Mineral, Cologne, Germany

关键词: Greenland;    Holocene;    Arctic Canada;    Holocene thermal maximum;    Neoglacial;   

DOI  :  10.1016/j.quascirev.2016.02.010

来源: Elsevier

【 摘 要 】

This synthesis paper summarizes published proxy climate evidence showing the spatial and temporal pattern of climate change through the Holocene in Arctic Canada and Greenland. Our synthesis includes 47 records from a recently published database of highly resolved Holocene paleoclimate time series from the Arctic (Sundqvist et al., 2014). We analyze the temperature histories represented by the database and compare them with paleoclimate and environmental information from 54 additional published records, mostly from datasets that did not fit the selection criteria for the Arctic Holocene database. Combined, we review evidence from a variety of proxy archives including glaciers (ice cores and glacial geomorphology), lake sediments, peat sequences, and coastal and deep-marine sediments. The temperature-sensitive records indicate more consistent and earlier Holocene warmth in the north and east, and a more diffuse and later Holocene thermal maximum in the south and west. Principal components analysis reveals two dominant Holocene trends, one with early Holocene warmth followed by cooling in the middle Holocene, the other with a broader period of warmth in the middle Holocene followed by cooling in the late Holocene. The temperature decrease from the warmest to the coolest portions of the Holocene is 3.0 +/- 1.0 degrees C on average (n = 11 sites). The Greenland Ice Sheet retracted to its minimum extent between 5 and 3 ka, consistent with many sites from around Greenland depicting a switch from warm to cool conditions around that time. The spatial pattern of temperature change through the Holocene was likely driven by the decrease in northern latitude summer insolation through the Holocene, the varied influence of waning ice sheets in the early Holocene, and the variable influx of Atlantic Water into the study region. (C) 2016 Elsevier Ltd. All rights reserved.

【 授权许可】

Free