Fire Return Interval Departure (Frid) - Mean Condition Class

This metric, uses the mean percent FRID to a measure of the extent to which contemporary fires (i.e., since 1908) are burning at frequencies similar to the frequencies that occurred prior to Euro-American settlement, with the mean reference FRI binned into another basis for comparison. Mean PFRID is a metric of fire return interval departure (FRID), and measures the departure of current FRI from reference mean FRI in percent.

Data and Resources

Additional Info

Field Value
Version Version 5.0
Last Updated March 28, 2025, 8:35 AM (UTC+00:00)
Created March 7, 2025, 7:52 AM (UTC+00:00)
categorical_values {"2": 36757772, "3": 104220006, "1": 35245045, "-1": 13152714, "-2": 10583003, "-3": 2484161}
category /Fire Dynamics/Functional Fire/Fire Return Interval Departure (FRID)
collection_name California Landscape Metrics
creation_method This is a condition class categorization of the data in the Mean PFRID field. MeanCC_FRI categorizes the percent differences calculated in Mean PFRID using the following scale: * 1: 0 to 33.3% departure * 2: 33 to 66.7% departure * 3: >66.7% departure Negative condition classes (i.e., where fires are burning more often than under pre-Anglo-American settlement conditions) are categorized on the negative of the same scale: * -1: 0 to -33.3% * -2: -33 to -66.7% * -3: <-66.7% CC1 and CC-1 are mapped in the same class because they are both within 33% of the mean pre-settlement value.
data_units Integer, 3 to 3
data_vintage 2022. Includes disturbances through the end of 2022.
date_updated August 2024
element Functional Fire
encoding utf8
file_name FRID_ConditionClass_2022_202401_T1_v5
format GeoTiff
harvest_object_id b2878fcb-cd2d-427a-b29a-cd003592b506
harvest_source_id a2637971-af12-457f-ae4a-831d2202a539
harvest_source_title WIFIRE Commons
maximum_value 3.0
metric_definition_and_relevance This metric, uses the mean percent FRID to a measure of the extent to which contemporary fires (i.e., since 1908) are burning at frequencies similar to the frequencies that occurred prior to Euro-American settlement, with the mean reference FRI binned into another basis for comparison. Mean PFRID is a metric of fire return interval departure (FRID), and measures the departure of current FRI from reference mean FRI in percent.
minimum_value -3.0
pillar Fire Dynamics
spatial {"type": "Polygon", "coordinates": [[[-124.5090833859125, 32.4242698701859], [-113.49380570277376, 32.4242698701859], [-113.49380570277376, 42.1119747450123], [-124.5090833859125, 42.1119747450123], [-124.5090833859125, 32.4242698701859]]]}
sub_element Fire Return Interval Departure (FRID)
tier 1