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About ForGATE

Contact: Mark Twery

ForGATE is a downloadable spreadsheet tool designed to communicate information relevant to the evaluation of projected net greenhouse gas (GHG) exchange in the context of Maine’s forests, the forest sector of northeastern North America, and alternative national or regional carbon (C) accounting guidelines. A full version of Microsoft Excel® (2007 or later) is required to run ForGATE. Documentation and instructions are integrated into the tool itself.

ForGATE was created to provide forest managers and policy makers with an easy-to-use tool for examining the relative merit (C-credit revenue vs. project cost) of alternative C-offset projects in the context of life-cycle forest-sector GHG accounting from stump to mill gate. GHG accounts include: 1) storage in above- and below-ground live biomass and dead organic matter components; 2) storage in forest products in use and in landfills; 3) forest-sector emissions by harvest, transport, and mills or avoided emissions (substitution; bioenergy), as well as 4) landfill methane release and avoided emissions from methane energy capture. Individual forest and forest-product pools reported in results worksheets can be excluded from result summaries to reflect different C-accounting guidelines (such as the Climate Action Reserve or Verified Carbon Standard). Results can be compared for baseline and C-offset project scenarios. The user can define alternative forest management strategies based on common silvicultural systems or choose to evaluate the C implications of reserve strategies. Forest C yield curves are based on Maine statewide Forest Inventory and Analysis plots modeled using the carbon submodel of the Forest Vegetation Simulator (Northeast Variant). The user can also modify many of the forest-sector emissions assumptions. Where possible, the marginal differences between baseline and project scenario performance indicators are calculated. All forest-level emission or storage measures are expressed in tonnes of CO2e for comparison purposes. Graphical analytics are provided for quick visual evaluation of baseline versus scenario differences. Finally, economic indicators, such as net present value or benefit-cost ratios for a C-offset project, can be evaluated for alternative assumptions about the value of stumpage, C credits, and offset project costs.

Documentation and Downloads

Description Download
ForGATE tool ForGATE.2012.3.xlsx (5.0 mb Excel 2007 file)


Last Modified: 03/12/2012