Fire Regimes in the "Two Californias": Research Brief

According to a recent statewide FRID (fire return interval departure) analysis for USFS and some NPS lands, there are two distinct California fire regimes. 
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Safford, H. D., and K. M. Van de Water. 2014. Using fire return interval departure (FRID) analysis to map spatial and temporal changes in fire frequency on national forest lands in California. Res. Pap. PSW-RP-266. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. 59pp.