This dataset provides Percent Fire Return Interval Departure (pFRID) estimates derived using Safford et al.'s methodology. The approach calculates fire regime deviations by comparing contemporary fire return intervals to historic presettlement averages. Historic data is sourced from literature reviews and expert-informed fire regime groups, offering foundational insights into fire frequency variability across California ecosystems.

Applied across the same geographic extent as Vibrant Planet's pFRID dataset, this version enables direct comparisons to evaluate improvements in statistical accuracy and planning relevance. This dataset supports land managers in assessing fire regime changes and informing restoration and wildfire management strategies.

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