Annex 2 Working Group Reports Evaluation of the Atmospheric-flow Approach

The Tier 1 method disaggregates the production data and import/export data into categories of wood fuels, slash, and short and longer-term roundwood production and products. Two categories of decay are distinguished. Emissions from the short-lived product pool are released in the first year and a single decay rate is applied to all longer-lived products. For this purpose the Guidelines could recommend an agreed default decay rate and countries could apply this or develop their own. Again, FAO data are available to support this method.