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Service Description: The area of a landscape with a deficient fire frequency was estimated by comparing observed fire frequencies to historical mean fire return intervals (MFRI, LF2014 v1.4.0).  Observed fire frequencies were calculated by determining the frequency of fire for each pixel based on raster data of observed fires from the Monitoring Trends in Burn Severity (MTBS) project from 1984 to 2021 and CBI for 2022. Areas classified as unburned/low severity by MTBS/CBI were removed from this analysis. The ratio of observed to historical fire frequencies was used to determine pixels that are burning less frequently than expected, as determined by LANDFIRE MFRI. These pixels were then used to determine the percent area of the landscape deficient in fire based on fire frequencies.

Map Name: TCA_Alaska_Fire_Deficit

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Description: The area of a landscape with a deficient fire frequency was estimated by comparing observed fire frequencies to historical mean fire return intervals (MFRI, LF2016_BPS_200_CONUS).  Observed fire frequencies were calculated by determining the frequency of fire for each pixel based on raster data of observed fires from the Monitoring Trends in Burn Severity (MTBS) project from 1984 to 2020. Areas classified as unburned/low severity by MTBS were removed from this analysis. The ratio of observed to historical fire frequencies was used to determine pixels that are burning less frequently than natural, as determined by LANDFIRE MFRI. These pixels were then added up to determine the percent area of the landscape deficient in fire based on fire frequencies.

Copyright Text: The USDA Forest Service makes no warranty, expressed or implied, including the warranties of merchantability and fitness for a particular purpose, nor assumes any legal liability or responsibility for the accuracy, reliability, completeness or utility of these geospatial data, or for the improper or incorrect use of these geospatial data. These geospatial data and related maps or graphics are not legal documents and are not intended to be used as such. The data and maps may not be used to determine title, ownership, legal descriptions or boundaries, legal jurisdiction, or restrictions that may be in place on either public or private land. Natural hazards may or may not be depicted on the data and maps, and land users should exercise due caution. The data are dynamic and may change over time. The user is responsible to verify the limitations of the geospatial data and to use the data accordingly.

Spatial Reference: 102006  (3338)


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Spatial Reference: 102006  (3338)

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YMin: 404385
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Spatial Reference: 102006  (3338)

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Title: TCA Alaska Fire Deficit
Author:
Comments: The area of a landscape with a deficient fire frequency was estimated by comparing observed fire frequencies to historical mean fire return intervals (MFRI, LF2016_BPS_200_CONUS).  Observed fire frequencies were calculated by determining the frequency of fire for each pixel based on raster data of observed fires from the Monitoring Trends in Burn Severity (MTBS) project from 1984 to 2020. Areas classified as unburned/low severity by MTBS were removed from this analysis. The ratio of observed to historical fire frequencies was used to determine pixels that are burning less frequently than natural, as determined by LANDFIRE MFRI. These pixels were then added up to determine the percent area of the landscape deficient in fire based on fire frequencies.
Subject: The percent area of a landscape analysis unit identified as having a fire deficit by comparing modern fire occurrence
Category:
Keywords: TCA,Alaska,fire deficit
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