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
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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
Late quaternary vegetational history of southeastern Labrador.
TL;DR: Pollen percentage and influx diagrams for three lake-sediment cores from southeastern Labrador are subdivided into three regional pollen assemblage zones: (I) Betula-SalixCyperaceae zone, 10,500 to 9000 14C yr BP; (II) Alnus-Abies-Picea zone, 9000 to 5000 BP, and (III) Picea Zone, 5000 BP to present.
Journal ArticleDOI
Reversion of forest to tundra in the central yukon
Les C. Cwynar,Ray W. Spear +1 more
TL;DR: The results support the conclusion from other recent studies that Alaska and northwest Canada experienced warmer summers than today from as early as 10 000 BP to 6000 BP in response to increased summer insolation arising from changes in the earth's orbital parameters as predicted by the Astronomic Theory of climate change.
Postglacial development of the subalpine-boreal transition forest
Glen M. MacDonald,Ontario Mic Ia +1 more
Journal ArticleDOI
Postglacial development of the subalpine-boreal transition forest of western Canada.
TL;DR: In this paper, the authors used fossil pollen and charcoal from the sediments of small lakes in the northern subalpine-boreal transition region to reconstruct the postglacial history of regional vegetation change, peatland development and fire.
Journal ArticleDOI
Climatic impacts on the vegetation of eastern North America during the past 2000 years
TL;DR: In this paper, the authors analyzed 7 lakes with annually laminated sediments sampled at 40-year intervals to isolate the climatic effects from other effects on the long-term dynamics of vegetation during the past 1000-2000 years along a transect from Maine to Minnesota.
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