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    Author(s): Amy E. Hessl; Uyanga Ariya; Peter Brown; Oyunsannaa Byambasuren; Tim Green; Gordon Jacoby; Elaine Kennedy Sutherland; Baatarbileg Nachin; R. Stockton Maxwell; Neil Pederson; Louis De Grandpre; Thomas Saladyga; Jacques C. Tardif
    Date: 2012
    Source: International Journal of Wildland Fire. 21(1): 86-92.
    Publication Series: Scientific Journal (JRNL)
    Station: Rocky Mountain Research Station
    PDF: View PDF  (365.13 KB)

    Description

    Rising temperatures are expected to increase wildfire activity in many regions of the world. Over the last 60 years in Mongolia, mean annual temperatures have increased ~2°C and the recorded frequency and spatial extent of forest and steppe fires have increased. Few long records of fire history exist to place these recent changes in a historical perspective. The purpose of this paper is to report on fire history research from three sites in central Mongolia and to highlight the potential of this region as a test case for understanding the relationships between climate change, fire and land use. We collected partial cross-sections from fire-scarred trees and stumps at each site using a targeted sampling approach. All three sites had long histories of fire ranging from 280 to 450 years. Mean Weibull fire return intervals varied from 7 to 16 years. Fire scars at one protected-area site were nearly absent after 1760, likely owing to changes in land use. There is limited synchrony in fire occurrence across sites, suggesting that fire occurrence, at least at annual time scales, might be influenced by local processes (grazing, human ignitions, other land-use factors) as well as regional processes like climate. Additional data are being collected to further test hypotheses regarding climate change, land use and fire.

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    Citation

    Hessl, Amy E.; Ariya, Uyanga; Brown, Peter; Byambasuren, Oyunsannaa; Green, Tim; Jacoby, Gordon; Sutherland, Elaine Kennedy; Nachin, Baatarbileg; Maxwell, R. Stockton; Pederson, Neil; De Grandpre, Louis; Saladyga, Thomas; Tardif, Jacques C. 2012. Reconstructing fire history in central Mongolia from tree-rings. International Journal of Wildland Fire. 21(1): 86-92.

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    Keywords

    climate change, forest-steppe, land use

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https://www.fs.usda.gov/treesearch/pubs/40386