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Vegetation mediated the impacts of postglacial climate change on fire regimes in the south-central Brooks Range, Alaska
We examined direct and indirect impacts of millennial-scale climate change on fire regimes in the south-central Brooks Range, Alaska, USA, using four lake sediment records and existing paleoclimateExpand
SPATIAL CONTROLS OF HISTORICAL FIRE REGIMES: A MULTISCALE EXAMPLE FROM THE INTERIOR WEST, USA
Our objective was to infer the controls of spatial variation in historical fire regimes. We reconstructed a multicentury history of fire frequency, size, season, and severity from fire scars andExpand
Holocene thermal maximum in the western Arctic (0-180°W)
The spatio-temporal pattern of peak Holocene warmth (Holocene thermal maximum, HTM) is traced over 140 sites across the Western Hemisphere of the Arctic (0–180°W; north of ∼60°N). PaleoclimateExpand
Climate change and Arctic ecosystems: 2. Modeling, paleodata‐model comparisons, and future projections
Large variations in the composition, structure, and function of Arctic ecosystems are determined by climatic gradients, especially of growing-season warmth, soil moisture, and snow cover. A unifiedExpand
Beringia as a glacial refugium for boreal trees and shrubs: new perspectives from mapped pollen data
TLDR
The rapid post-glacial migration rate reported for Picea in western Canada may be over estimated, and the expansion of trees and shrubs within Beringia should have been nearly contemporaneous with climatic change, suggesting boreal trees or shrubs are capable of surviving long periods in relatively small populations. Expand
Modern pollen data from North America and Greenland for multi-scale paleoenvironmental applications
TLDR
Squared-chord distances computed between samples show that most modern pollen samples find analogues within their own vegetation zone, and temperature and precipitation inferred from best analogues are highly correlated with observed values but temperature exhibits the strongest relation. Expand
Understanding the origin and analysis of sediment-charcoal records with a simulation model
Interpreting sediment-charcoal records is challenging because there is little information linking charcoal production from fires to charcoal accumulation in lakes. We present a numerical modelExpand
Vegetation history of northcentral Alaska: A mapped summary of late-quaternary pollen data
Abstract Fossil pollen data, as illustrated by isopoll and isochrone maps, document the complex late Quaternary history of tundra and boreal forest development in northcentral Alaska. Major plantExpand
Recent burning of boreal forests exceeds fire regime limits of the past 10,000 years
TLDR
It is suggested that boreal forests can sustain high-severity fire regimes for centuries under warm and dry conditions, with vegetation feedbacks modulating climate–fire linkages. Expand
Frequent Fires in Ancient Shrub Tundra: Implications of Paleorecords for Arctic Environmental Change
TLDR
Paleoecological data suggest that greater fire activity will likely accompany temperature-related increases in shrub-dominated tundra predicted for the 21st century and beyond, which will have broad impacts on physical and biological systems as well as on land-atmosphere interactions in the Arctic. Expand
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