2025 Natural and Working Lands Carbon Inventory Update

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Proposed 2025 Inventory Update Methods

Building upon estimates of statewide ecosystem carbon inventories made in the 2018 report, the California Air Resources Board (CARB) will be updating the methods used to calculate the inventories in each of the following landscape types and associated soils as well as in the harvested wood products that California keeps within its borders.

California’s NWL will experience change through the coming years, whether through climate change, wildfires, or increased climate action and management. Further, an ever-increasing number of local and regional jurisdictions are interested in including NWL into their climate action or general planning. To increase the sensitivity of the NWL inventory to change, and enhance accuracy at scales lower than statewide, CARB staff have developed proposed methods to use to develop the inventory for a 2025 update. See the technical writeups that outline these methods below:

These methods were presented at a public workshop on February 7, 2025. You can see the recording and public feedback from that meeting on the Nature Based Strategies Meetings and Workshops page.