A synthesis of historical fire regimes in the southwestern United - - PowerPoint PPT Presentation

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A synthesis of historical fire regimes in the southwestern United - - PowerPoint PPT Presentation

Jan 15, 2024 10 likes •263 views

A synthesis of historical fire regimes in the southwestern United States Christopher Guiterman 1* , S. Brewster Malevich 1 , Ellis Margolis 2 , Christopher Baisan 1 , Erica Bigio 3 , Peter Brown 4 , Donald Falk 1,5 , Peter Ful 6 , and Thomas

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A synthesis of historical fire regimes in the southwestern United States

Christopher Guiterman1*, S. Brewster Malevich1, Ellis Margolis2, Christopher Baisan1, Erica Bigio3, Peter Brown4, Donald Falk1,5, Peter Fulé6, and Thomas Swetnam1

1Laboratory of Tree-Ring Research, University of Arizona; 2US Geological Survey Fort Collins Science Center,

New Mexico Landscapes Field Station; 3Department of Natural Resources and Environmental Sciences, University of Nevada Reno; 4Rocky Mountain Tree-Ring Research; 5School of Natural Resources and the Environment, University of Arizona; 6School of Forestry, Northern Arizona University

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63 sites

Swetnam and Betancourt 1998, Journal of Climate

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  • 414 sites • 5,039 trees • 37,220 fire scars

Data sources:

  • International

multiproxy paleofire database (IMPD)

  • Fire and Climate

Synthesis Project (FACS)

  • New contributions
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Objectives

  • Quantify the spatiotemporal variability of regional fire-scar records:

Pyrodiversity

  • Seasonality
  • Fire frequency and change
  • Interannual fire-climate relationships
  • Elucidate the strength of climate in driving fire regime metrics
  • Identify and understand human-fire interactions
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Photo credit: T.W. Swetnam, http://www.ltrr.arizona.edu/~sheppard/swland/scar.jpg

Dormant Late earlywood

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Image courtesy: Mike Crimmins

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Swetnam and Betancourt 1998, Journal of Climate

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Multi-decadal fire frequency

  • Individual sites > 300 years
  • Sorted based on clustering of
  • verall pattern
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Swetnam and Betancourt 1998, Journal of Climate

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Swetnam and Betancourt 1998, Journal of Climate

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PDSI: Cook et al. 2010, Journal of Quaternary Science: Living-blended drought atlas

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There’s great value in historical pyrodiversity

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THANK YOU

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