Folks, this April 2023 paper is full of interesting data. For example, this shows that some USFS regions are net CO2 emitters (positive numbers), while others are sinks (negative numbers). (Full title: “Greenhouse Gas Emissions and Removals From Forest Land, Woodlands, Urban Trees, and Harvested Wood Products in the United States, 1990–2021.)
2021 carbon stock changes (net flux) from forest land remaining forest land within the National Forest System (NFS) by NFS region and year (MMT CO2 Eq.):
|Net emissions and removals||-43.5|
2021 Estimates at a Glance
Summary statistics for 2021 from the compilation of the forest land, woodlands, HWP, and urban trees in settlements in the U.S. EPA (2023) report:
• Economy-wide GHG emissions increased from 2020 to 2021 by more than 6.8 percent.
• Forest land, HWP, woodlands, and urban trees in settlements collectively offset more than 12.4 percent (785.0 MMT CO2 Eq.) of total GHG emissions or 15.6 percent of CO2 emissions in 2021.
• Private forest land accounts for nearly 84 percent (-493.9 MMT CO2 Eq.) of the estimated net sink strength in the conterminous 48 States and coastal Alaska in 2021.
• Land conversions to and from forest land continue to result in net emissions and/or transfers of carbon to other land uses (33.1 MMT CO2 Eq.).
• Soils store more than 55 percent of all the carbon in forest ecosystems, with small stock changes annually.
• Forest land area burned was nearly 1.7 million ha, and GHG emissions were among the highest reported over the time series from 1990 to 2021.
• Forest uptake averages 0.6 metric tons of carbon per hectare per year (MT C ha-1 yr-1), with live vegetation accounting for more than 83 percent (0.5 MT C ha-1 yr-1) of the uptake.