Atmospheric and surface climate associated with 1986–2013 wildfires in North America

Journal of Geophysical Research: Biogeosciences
By: , and 

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Abstract

We analyze climate simulations conducted with the RegCM3 regional climate model on 50‐ and 15‐km model grids to diagnose the dependence of wildfire incidence and area burned variations on monthly climate long‐term means and anomalies over North America for the period 1986–2013. We created a new wildfire database by merging the Fire Program Analysis Fire‐Occurrence Database, the National Interagency Fire Center Fire History Data, and the Canadian National Fire Database. The database includes 2,083,865 daily fire starts that burned a total of 1.25 × 108 ha in North America. We derive long‐term climatologies, standardized gamma indices, and composite climate anomalies of atmospheric circulation (500‐hPa height and wind) and various surface fields (e.g., solar radiation, soil moisture, vapor pressure deficit, and latent and sensible heat fluxes) to illustrate the climatology of burned area. The immediate and lagged monthly atmospheric circulation and surface climate anomalies differentiate high‐ and low‐fire years and the role of El Niño–Southern Oscillation in wildfire occurrence. Our approach demonstrates the association of the seasonal cycles of wildfire and climate and the strong role of climatic variability in modulating the seasonal cycle as a control of wildfire on monthly time scales.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Atmospheric and surface climate associated with 1986–2013 wildfires in North America
Series title Journal of Geophysical Research: Biogeosciences
DOI 10.1029/2017JG004195
Volume 123
Issue 5
Year Published 2018
Language English
Publisher AGU
Contributing office(s) Northern Rocky Mountain Science Center
Description 22 p.
First page 1588
Last page 1609