BOREAS TE-19 Ecosystem Carbon Balance Model

The BOREAS TE-19 team developed a model called the Spruce and Moss Model (SPAM) designed to simulate the daily carbon balance of a black spruce/moss boreal forest ecosystem. It is driven by daily weather conditions, and consists of four components: (1) soil climate; (2) tree photosynthesis and respiration; (3) moss photosynthesis and respiration; and (4) litter decomposition and associated heterotrophic respiration. The model simulates tree gross and net photosynthesis, wood respiration, live root respiration, moss gross and net photosynthesis, and heterotrophic respiration (decomposition of root litter, young needle and moss litter, and humus). These values can be combined to generate predictions of total site net ecosystem exchange of carbon (NEE), total soil dark respiration (live roots + heterotrophs + live moss), spruce and moss net productivity, and net carbon accumulation in the soil. The files include source code and sample input and output files in ASCII format.

Data and Resources

Additional Info

Field Value
Maintainer Earthdata Forum
Last Updated March 30, 2026, 20:32 (UTC)
Created April 1, 2025, 14:50 (UTC)
accessLevel public
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harvest_source_id b99e41c6-fe79-4c19-bbc3-9b6c8111bfac
harvest_source_title Science Discovery Engine
identifier 10.3334/ORNLDAAC/487
license https://www.usa.gov/government-works
modified 2026-03-23T22:16:00Z
programCode {026:000}
publisher ORNL_DAAC
resource-type Dataset
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source_hash 4da903e45e2faf9ec5ba2510c090e662e2299fb5c986c850f971326be1b5402b
source_schema_version 1.1
spatial [[{"WestBoundingCoordinate":-111.0,"NorthBoundingCoordinate":60.0,"EastBoundingCoordinate":-94.0,"SouthBoundingCoordinate":50.0}],"CARTESIAN"]
temporal 1968-01-01/1995-12-31
theme {"Earth Science"}