Aboveground Carbon (average tons per acre)
&lt;p&gt;The TreeMap data was downloaded from&nbsp;&lt;a href="https://www.fs.usda.gov/rds/archive/Catalog/RDS-2021-0074"&gt;https://www.fs.usda.gov/rds/archive/Catalog/RDS-2021-0074&lt;/a&gt;.&nbsp;&nbsp;TreeMap data was chosen since aboveground carbon was able to be aggregated at a fireshed scale.&nbsp;&nbsp;Data provided is a 30X30 meter spatial resolution tree-level model of forests shown as a raster map for the conterminous U.S. circa 2016.&nbsp;&nbsp;A random forests machine-learning algorithm was used to impute forest plot data from Forest Inventory and Analysis (FIA) to a set of target rasters that were provided by&nbsp;&lt;a href="https://landfire.gov/"&gt;Landscape Fire and Resource Management Planning Tools&lt;/a&gt;.&lt;/p&gt;&lt;p&gt;A new aboveground carbon field (CARBON_Total) in tons per acre was calculated by adding attribute fields CARBON_L (Carbon, live above ground), CARBON_D (Carbon, standing dead), and CARBON_DWN (Carbon, dead down &amp;gt;3” diameter and stumps and roots &amp;gt;3” diameter).&nbsp;&nbsp;These were all provided as tons per acre.&nbsp;&nbsp;CARBON_D contained values of -99 for some plots which indicates null values equivalent to no standing dead trees; these were converted to zero values.&nbsp;&nbsp;A Lookup geoprocessing tool was run to isolate the CARBON_Total field from the rest of the attributes for further processing.&nbsp;&nbsp;Zonal Statistics by Table were run to gather basic statistics on CARBON_Total using a western US Forest Service firesheds layer as the feature zone and FIRESHED_ID field as the Zone Field.&nbsp;&nbsp;Ignore No Data in calculations was selected for this process.&nbsp;&nbsp;This allowed for the statistics to be calculated for the CARBON_Total pixel values that fall within each NFS west fireshed.&nbsp;&nbsp;The resulting table was then joined to the original western US Forest Service firesheds layer and displayed as an average of CARBON_Total (tons per acre) symbolized in 4 categories with an emphasis on those firesheds that have average aboveground carbon in tons per acre in the upper quartile.&lt;/p&gt;&lt;p&gt;Aboveground carbon does not include litter, duff, downed woody material &amp;lt;=3” in diameter, soils, or below ground carbon.&lt;/p&gt;
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