This map shows the rate at which forests could capture carbon from the atmosphere and store it in aboveground live biomass over the first 30 years of natural forest regrowth. It was created by combining ground-based measurements at thousands of locations around the world with 66 co-located environmental covariate layers in a machine learning model to produce a wall-to-wall map. Forest plot data used to train the model are sourced from published literature, which can be found in the Forest Carbon database (ForC, maintained by the Smithsonian Institute (https://github.com/forc-db)), as well as georeferenced data from publicly available national forest inventories. Although rates were estimated over all forest and savanna biomes globally, they are filtered here by “reforestable” area, as defined in Griscom et al. 2017 (PNAS). Reforestable areas exclude areas of native grasslands and croplands to safeguard the production of food and fiber and habitat for biological diversity.Extent: Global, within reforestation extent of Griscom et al. 2017 (which excludes the boreal, grassy biomes, and croplands) Resolution: 1 km x 1 kmCitation: Cook-Patton, S.C., Leavitt, S.M., Gibbs, D. et al. Mapping carbon accumulation potential from global natural forest regrowth. Nature 585, 545–550 (2020).Credits: Cook-Patton, S.C., S.M. Leavitt, D. Gibbs, N.L. Harris, K. Lister, K.J. Anderson-Teixeira, R.D. Briggs, R.L. Chazdon, T.W. Crowther, P.W. Ellis, H.P. Griscom, V. Herrmann, K.D. Holl, R.A. Houghton, C. Larrosa, G. Lomax, R. Lucas, P. Madsen, Y. Malhi, A. Paquette, J.D. Parker, K. Paul, D. Routh, S. Roxburgh, S. Saatchi, J.van den Hoogen, W.S. Walker, C.E. Wheeler, S.A. Wood, L. Xu, B.W. Griscom. 2020. Mapping carbon accumulation potential from natural forest regrowth. Nature, in press. https://www.nature.com/articles/s41586-020-2686-x. This work resulted from a collaboration between The Nature Conservancy, World Resources Institute, and 18 other institutions.Date: Applicable to the first 30 years of natural forest regrowth. Related layers: Carbon accumulation potential from natural forest regrowth in forest and savanna biomes, Uncertainty in carbon accumulation potential from natural forest regrowth

Estimates the uncertainty in carbon accumulation potential from natural forest regrowth. Specifically, the uncertainty metric is calculated as the modeled sequestration rate (mean of 100 random forest models) divided by the standard error of the 100 random forest models. Uncertainty is presented as a ratio because areas with higher sequestration rates tend to have high standard errors for their sequestration rates; presenting error as a ratio standardizes the model error by the sequestration rate. Higher numbers represent greater uncertainty in the model. For reference, an error ratio of 0.5 means that the standard error of the random forest models is half as large as the mean output of the models for that pixel. The rate uncertainties were estimated over all forest and savanna biomes.Extent: Global, within forest and savanna biomesCitation: Cook-Patton, S.C., Leavitt, S.M., Gibbs, D. et al. Mapping carbon accumulation potential from global natural forest regrowth. Nature 585, 545–550 (2020).Credits: Cook-Patton, S.C., S.M. Leavitt, D. Gibbs, N.L. Harris, K. Lister, K.J. Anderson-Teixeira, R.D. Briggs, R.L. Chazdon, T.W. Crowther, P.W. Ellis, H.P. Griscom, V. Herrmann, K.D. Holl, R.A. Houghton, C. Larrosa, G. Lomax, R. Lucas, P. Madsen, Y. Malhi, A. Paquette, J.D. Parker, K. Paul, D. Routh, S. Roxburgh, S. Saatchi, J.van den Hoogen, W.S. Walker, C.E. Wheeler, S.A. Wood, L. Xu, B.W. Griscom. 2020. Mapping carbon accumulation potential from natural forest regrowth. Nature, in press. https://www.nature.com/articles/s41586-020-2686-x. This work resulted from a collaboration between The Nature Conservancy, World Resources Institute, and 18 other institutions.Resolution: 1 x 1 kmDate: Applicable to the first 30 years of natural forest regrowth. Related layers: Carbon accumulation potential from natural forest regrowth in reforestable areas, Carbon accumulation potential from natural forest regrowth in forest and savanna biomes