NACP: Forest Carbon Stocks, Fluxes and Productivity Estimates, Western USA, 1979-2099

This dataset contains annual estimates of carbon stocks, fluxes, and productivity over forested land in 11 states of the western USA (Arizona, California, Colorado, Idaho, Montana, Nevada, New Mexico, Oregon, Utah, Washington, and Wyoming). The estimates were produced from multiple simulations using the Community Land Model (v4.5) with different climate forcing data and prescribed harvest rates. Business as usual (BAU) scenarios were run to ensure that the simulations represented present-day stand ages. The estimates span two modeled time periods, 1979-2014 and 2015-2099, at 1/24-degree (4 km x 4 km) resolution. Variables included are gross primary production (GPP), net ecosystem exchange (NEE), net ecosystem productivity (NEP), net primary production (NPP), autotrophic respiration (RA), heterotrophic respiration (RH), transpiration factor, aboveground live tree carbon, carbon loss from fire, allocation to stem carbon, and burned area fraction over forested areas of the western USA.

Data and Resources

Additional Info

Field Value
Maintainer Earthdata Forum
Last Updated September 1, 2026, 05:56 (UTC)
Created April 1, 2025, 17:55 (UTC)
accessLevel public
bureauCode {026:00}
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
harvest_object_id 83994080-0a5d-4c10-8c77-578e5dde072c
harvest_source_id b99e41c6-fe79-4c19-bbc3-9b6c8111bfac
harvest_source_title Science Discovery Engine
identifier 10.3334/ORNLDAAC/1662
license https://www.usa.gov/government-works
modified 2026-08-24T22:15:59Z
programCode {026:000}
publisher ORNL_DAAC
resource-type Dataset
source_datajson_identifier true
source_hash 0f4f8448ac48d05b9e6d1301ae45422b547de7eae1b071ea4bb6a9f691023e12
source_schema_version 1.1
spatial ["CARTESIAN", [{"WestBoundingCoordinate": -124.812, "NorthBoundingCoordinate": 49.0351, "EastBoundingCoordinate": -101.961, "SouthBoundingCoordinate": 31.1875}]]
temporal 1979-01-01/2099-12-31
theme {"Earth Science"}