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Categories based on percent of area in each fireshed that meets the definition of 'fire-deficient,' based on ratios of observed to historical fire frequencies |
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Categories based on percent of area in each fireshed that meets the definition of 'fire-deficient,' based on ratios of observed to historical fire frequencies |
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USDA Forest Service Terrestrial Condition Assessment (TCA) and Mature and Old Growth Inventory Technical Team: Scott Barndt, Andrew Gray, Greg Hayward, Christopher Hiemstra, Aaron Kamoske, Shanna Kleinsmith, Joseph Krueger, Marin Palmer, Kristen Pelz, Wade Salverson |
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<DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>This data layer displays the percent of forested area in each fireshed that is experiencing a fire deficit over the last 100 years: Very Low (less than 45% of forested area); Low (45 to 58% of forested area); Moderate (58 to 70% of forested area); High (70 to 83% of forested area); and Very High (greater than 83% of forested area). Fire deficit was determined for each 30-m pixel by comparing observed fire frequencies from 1923 to 2023 to historical mean fire return intervals (MFRI from LANDFIRE). The ratio of observed to historical fire frequencies was used to determine pixels that are burning less frequently than expected and therefore have deficit in fire. The area represented by these pixels compared to the area forested within the fireshed was used to determine the percent of forested area in the fireshed experiencing a fire deficit. This percentage was the input value into the Mature and Old Growth Condition Assessment (MOG-CA, an Ecosystem Management Decision Support-based logic model) to produce the fire deficit scores. The MOG-CA leveraged thresholds to convert these values into scores ranging from +1 (Very Good Condition, Very Low Risk) to -1 (Very Poor Condition, Very High Risk).</SPAN></SPAN></P><P /><DIV STYLE="font-size:12pt"><P><SPAN>Spatial Extent: CONUS</SPAN></P><P><SPAN>Units: "Categories of % of area:</SPAN></P><P><SPAN>Very Low (<45% of area)</SPAN></P><P><SPAN>Low (45-58% of area)</SPAN></P><P><SPAN>Moderate (58-70% of area)</SPAN></P><P><SPAN>High (70-83% of area)</SPAN></P><P><SPAN>Very High (>83% of area)"</SPAN></P></DIV></DIV></DIV></DIV> |
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<DIV STYLE="text-align:Left;"><DIV><DIV><DIV STYLE="font-size:12pt"><P><SPAN>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.</SPAN></P></DIV></DIV></DIV></DIV> |
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MOGCA Fire Deficit Scores at the Project Area Scale for the Conterminous United States |
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["Climate Risk Viewer","US Forest Service","USFS","Office of Sustainability and Climate","OSC","CRV","Climate Change","Forest"] |
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en-US |
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150000000 |
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