Tropical forest cover change assessment 1990-2010 (TREES-3 project)

The TREES-3 project of the Joint Research Centre of the European Commission aimed at assessing change of the world’s tropical forest cover, for the periods 1990–2000 and 2000–2010. Based on a systematic sampling approach, multi-temporal satellite imagery were analysed for a large number of sample sites in the tropics (4016 sample units of 10x10 km2 size).

Processing: Imagery of Landsat satellites (TM and ETM+ sensors) at spatial resolution of 30m was pre-processed as input to automated procedures of image segmentation (eCognition software), digital classification and change detection. Visual assessments and quality control/validation were performed using dedicated image analysis tools and involving forestry experts from tropical countries. Changes in forest area were mapped and change statistics and matrices established. The results also served as input to the Remote Sensing Survey of the FAO Global Forest Resources Assessment programme (FRA).

Estimates for global and continental carbon emissions due to forest cover changes in the tropics derived from TREES-3 assessment.
Continental charts showing (from left to right): (a) area of forest cover (green) and other wooded land (orange) for year 2010 in million ha, (b) annual gross loss of forest cover for 1990s (pink) and 2000s (red) in million ha yr-1 and (c) annual gross loss of carbon losses from changes in forest cover and other wooded land for 1990s (light blue) and 2000s (dark blue) with removals from forest regrowth (yellow) in million tC yr-1. Ranges represent statistical standard error for (a) and (b) and maximum–minimum estimates for(c).

References for Tropical dataset

Achard F., Beuchle R., Mayaux P., Stibig H.-J., Bodart C., Brink A., Carboni S., Desclée B., Donnay F., Eva H.D., Lupi A., Raši R., Seliger R., Simonetti D.
Determination of tropical deforestation rates and related carbon losses from 1990 to 2010
Global Change Biology (2014) 20, 2540–2554

References for Continental or Regional datasets

Beuchle R, Grecchi RC, Shimabukuro YE, Seliger R, Eva HD, Sano E, Achard F
Land cover changes in the Brazilian Cerrado and Caatinga biomes from 1990 to 2010 based on a systematic remote sensing sampling approach
Applied Geography 58 (2015) 116-127
Stibig, H.-J., Achard, F., Carboni, S., Raši, R., Miettinen J., 2014
Changes in tropical forest cover of Southeast Asia from 1990 to 2010
Biogeosciences. 11, 247-258 (2014)
Mayaux P., Pekel J.-F., Desclée B., Donnay F., Lupi A., Achard F., Clerici M., Bodart C., Nasi R., Belward A.
State and evolution of the African rainforests between 1990 and 2010
Phil. Trans. R. Soc. B 368: 20120300
Bodart C, Brink A, Donnay F, Lupi A, Mayaux P, Achard F
Continental estimates of forest cover and forest cover changes in the dry ecosystems of Africa for the period 1990 - 2000
Journal of Biogeography (J. Biogeogr.) (2013) 40, 1036–1047
Eva H.D., Achard F., Beuchle R., De Miranda E., Carboni S., Seliger R., Vollmar M., Holler W., Oshiro O., Barrena V., Gallego J.
Forest cover changes in tropical South and Central America from 1990 to 2005 and related carbon emissions and removals
Remote Sens. 2012, 4, 1369-1391