FRA 2000 - Comparison of forest area and forest area change estimates derived from FRA 1990 and FRA 2000
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The working paper compares the 1990 net forest areas and the figures for net annual forest area change derived from FRA 1990 and FRA 2000. The total 1990 forest area registered by FRA 2000 was found to be 521 million ha or 15.1% larger than the corresponding figure from FRA 1990. This difference owes primarily to change of definitions of forest between the assessments (in particular the lowering of the threshold value for crown density in the industrialized countries from 20 to 10%). The change of forest definitions had the largest impact on the reported forest areas for Australia and the Former USSR. Due to the above, a larger forest area was studied in FRA 2000 compared to FRA 1990. Despite that, the net annual forest area change during the 1990's reported for FRA 2000 was - 9.4 million ha, representing a positive development from the FRA 1990 estimate of - 13.1 million ha during the 1980's. The rate of net forest area loss as reported by FRA has thereby decreased by 3.7 million ha f rom the 1980's to the 1990s. If the FRA 1990 definitions are applied to the data for the 1990s, the slowing net deforestation trend at the global level is further enhanced.