Decadal averages of ecosystem carbon balance, snow cover and soil moisture by Landscape Conservation Cooperative Regions for Alaska and Northwestern Canada

Decadal averages of the soil and vegetation carbon pools (TgC) and the main carbon fluxes (TgC/year), snow depth (m), organic layer thickness (m) and moisture ( m3/m3) for [1901-1910], [2001-2010] and [2091-2100]. Carbon fluxes are vegetation Net Primary Productivity (NPP), Gross Primary Productivity (GPP), soil Heterotrophic respiration (HR) and fire emission from organic layer and vegetation burning. Soil carbon stocks encompass carbon in the organic layers, in 1m deep mineral layers and dead woody debris. Vegetation carbon stocks concern only living biomass. Annual vegetation and soil carbon stocks are estimates for the month of December. Annual values of carbon fluxes, organic layer thickness and moisture are averages of monthly estimates. Annual values of snow thickness correspond to the maximum monthly estimates per year.

Averages are provided for the 5 main Landscape Conservation Cooperative (LCC) regions: Arctic LCC, North Pacific LCC, Western Alaska LCC, Northwestern boreal LCC, north and south sub-regions. Historical records start in 1901 and end in 2009, projections start in 2010 and end in 2100. Projections have been conducted for two climate models for the A1B emission scenario of the Intergovernmental Panel on Climate Change Special Report on Emissions Scenarios Assessment Report 4 (IPCC-AR4). The two global circulation models used for these projections are (1) the 5th generation of the ECHAM general circulation model from the Max Planck Institute for Meteorology (MPI-ECHAM5/MPI-OM ), and (2) the fourth generation global circulation model from the Canadian Centre for Climate Modeling and Analysis (CCCMA-CGCM3.1(T47) ).