Reconstructing Millennial-Scale, Regional Paleoclimates of Boreal Canada during the Holocene
A. E. Viau,Konrad Gajewski +1 more
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TLDR
In this paper, regional paleoclimate reconstructions for northern Canada quantify Holocene climate variability on orbital and millennial time scales and provide a context to better understand the current global warming.Abstract:
Regional paleoclimate reconstructions for northern Canada quantify Holocene climate variability on orbital and millennial time scales and provide a context to better understand the current global warming. The reconstructions are based on available pollen diagrams from the boreal and low Arctic zones of Canada and use the modern analog technique (MAT). Four regional reconstructions document the space–time evolution of the climate during the Holocene. Highest summer and winter temperatures anomalies are found in central Canada during the early Holocene. Eastern Canada was relatively cool in the early Holocene, whereas central Canada was warmest at that time. Labrador was relatively dry in the early to mid-Holocene during which time western Canada was relatively moist. Millennial-scale temperature variations, especially the Medieval Warm Period and Little Ice Age are seen across the continent, with some suggestion of time-transgressive changes from west to east. At the millennial scale, precipitatio...read more
Citations
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Journal ArticleDOI
Pollen-based continental climate reconstructions at 6 and 21 ka: A global synthesis
Patrick J. Bartlein,Sandy P. Harrison,Sandy P. Harrison,Simon Brewer,Simon Connor,Basil A. S. Davis,Konrad Gajewski,Joel Guiot,T I Harrison-Prentice,A S Henderson,Odile Peyron,Iain Colin Prentice,Iain Colin Prentice,Marko Scholze,Heikki Seppä,Bryan N. Shuman,Shinya Sugita,Robert S. Thompson,A. E. Viau,John W. Williams,Haibin Wu +20 more
TL;DR: In this article, the mid-Holocene (MH, around 6 ka) and the Last Glacial Maximum (LGM, around 21 ka) were compared with palaeoclimate simulations currently being carried out as part of the fifth Assessment Report (AR5) of the Intergovernmental Panel on Climate Change.
Journal ArticleDOI
Anticipating the consequences of climate change for Canada’s boreal forest ecosystems1
TL;DR: The boreal woodlands and forests cover approximately 3.09 × 106 km2 in Canada and are characterized by cool summers and long cold winters as discussed by the authors, and have been warm since the 1850s.
Journal ArticleDOI
Global biomass burning: a synthesis and review of Holocene paleofire records and their controls
Jennifer R. Marlon,Patrick J. Bartlein,Anne-Laure Daniau,Sandy P. Harrison,Shira Y. Maezumi,Mitchell J. Power,Willy Tinner,Boris Vannière +7 more
TL;DR: In this paper, the authors synthesize existing sedimentary charcoal records to reconstruct Holocene fire history at regional, continental and global scales, and compare the two potential controls of burning at these broad scales to assess their relative importance on trends in biomass burning.
Journal ArticleDOI
Global characterization of the Holocene Thermal Maximum
TL;DR: In this article, the authors analyzed the global variations in the timing and magnitude of the Holocene Thermal Maximum (HTM) and their dependence on various forcings in transient simulations covering the last 9000 years (9 ka), performed with a global atmosphere-ocean-vegetation model.
Journal ArticleDOI
The PMIP4 contribution to CMIP6 – Part 2: Two interglacials, scientific objective and experimental design for Holocene and Last Interglacial simulations
Bette L. Otto-Bliesner,Pascale Braconnot,Sandy P. Harrison,Daniel J. Lunt,Ayako Abe-Ouchi,Ayako Abe-Ouchi,Samuel Albani,Patrick J. Bartlein,Emilie Capron,Anders E. Carlson,Andrea Dutton,Hubertus Fischer,Heilko Goelzer,Heilko Goelzer,Aline Govin,Alan M. Haywood,Fortunat Joos,Allegra N. LeGrande,William H. Lipscomb,Gerrit Lohmann,Natalie M. Mahowald,Christoph Nehrbass-Ahles,Francesco S. R. Pausata,Jean-Yves Peterschmitt,Steven J. Phipps,Hans Renssen,Qiong Zhang +26 more
TL;DR: In this article, two interglacial epochs are included in the suite of PMIP4 simulations in the Coupled Model Intercomparison Project (CMIP6) simulations.
References
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Journal ArticleDOI
The climate of North America and adjacent ocean waters ca. 6 ka
Konrad Gajewski,R. E. Vance,Michael Sawada,Inez Fung,L. Dennis Gignac,Linda A. Halsey,Jasmin John,Philippe Maisongrande,P. Mandell,Peta J. Mudie,Pierre J. H. Richard,A.G. Sherin,Jason Aurele Soroko,Dale H. Vitt +13 more
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Journal ArticleDOI
Multivariate Statistical Estimates of Holocene Vegetation and Climate Change, Forest-Tundra Transition Zone, NWT, Canada
TL;DR: In this paper, a transect from the boreal forest limit into tundra in the eastern Northwest Territories was used to obtain fossil pollen data and a multivariate statistical analysis was employed to interpret the pollen assemblages.
Journal ArticleDOI
Absolute pollen frequencies and carbon-14 age of a section of Holocene Lake sediment from the Riding Mountain area of Manitoba
TL;DR: A section of Holocene lake sediment in the Southern Boreal Forest of Manitoba was re-sampled, and the sedimentation rate was calculated from eight carbon-14 age determinations, suggesting modifications of an earlier reconstruction of vegetation, based on relative pollen frequencies.
Journal ArticleDOI
Paleoecology of postglacial tree line fluctuations on the Queen Charlotte Islands, Canada
TL;DR: In this article, plant macrofossil and pollen analyses of sediments from a high elevation lake on the Queen Charlotte Islands, British Columbia, reveal changes in vegetation and inferred climate during the Holocene.
Journal ArticleDOI
Potential glacial evidence for the younger dryas event in the Cordillera of North and South America
Gerald Osborn,Chalmers M. Clapperton,P. Thompson Davis,Mel A. Reasoner,Donald T. Rodbell,Geoffrey O. Seltzer,Greg Zielinski +6 more
TL;DR: In the Cordilleran ranges of North and South America there are several candidate moraines, many bracketed between radiocarbon ages of ca. 12 and 10 ka, which may be YD in age as mentioned in this paper.
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