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Fire climate interactions on the American Pacific Coast

Fire climate interactions on the American Pacific Coast. ACRE workshop Meteoswiss, June 24 2008. Valérie Trouet A.H. Taylor, A.M. Carleton, C.N. Skinner. Fire. Fire Environment Varies in Time and Space. Weather Wind Humidity Drought. Fuels - Vegetation Canopy

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Fire climate interactions on the American Pacific Coast

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  1. Fire climate interactions on the American Pacific Coast ACRE workshop Meteoswiss, June 24 2008 Valérie Trouet A.H. Taylor, A.M. Carleton, C.N. Skinner

  2. Fire

  3. Fire Environment Varies in Time and Space Weather Wind Humidity Drought Fuels - Vegetation Canopy Surface Ground Fire Environment Landform – Terrain Slope Aspect, Elevation, Hill - Slope - Drainage FireEffects

  4. Fire weather indices Fire growth potential, fire risk

  5. Fire weather indices Fire growth potential, fire risk • ERC • Fuel moisture • NFDRS • 19 (CA) + 14 (OR) RAWS • 1973-2005 • fire season (July-Sep)

  6. Haines Index • range 2 – 6 • NCEP/NCAR (2.5°) • daily (0000 UTC) • 1961-2000 Winkler et al. IJWF 2007

  7. Haines Index climatology Winkler et al. IJWF 2007

  8. Mediterranean Climate Area Oregon and northern California Trouet et al. GRL 2006

  9. Interannual variability HI

  10. HI, ERC vs. annual area burned ERC OR 0.4* CA 0.38*

  11. HI, ERC vs. annual area burned Trouet et al. TAC 2008

  12. Precipitation HI ERC Temperature

  13. High Low HI ERC

  14. Pacific North American (PNA) pattern

  15. Pacific North American (PNA) pattern Winter PNA – summer fire weather

  16. Conclusions • Severe fire weather years • strong regional signal • ~ widespread forest fires • ~ synoptic scale circulation patterns • particularly PNA

  17. Fire Regimes and Climatic Variability in the Mediterranean-Climate Areas of California, Southwestern Oregon, and Western Nevada Fire Scar Network

  18. Fire regime reconstruction 1889 LW 1879ME 1854 LE 1840 D 1828 D 1821 LE 1809 D 1799 D 1793 D 1787 LW 1781 ME 1775 D 1771 D 1765 LW

  19. Fire regime reconstruction

  20. Airborne Research & Survey Facility

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