Mind the gap: reconciling tropical forest carbon flux estimates from earth observation and national reporting requires transparency

Table 5 Old-growth Forest removal factors used by different flux datasets and disaggregated by biomes in Brazil

Biome	NGHGI and SEEG (Mg C ha⁻¹ yr⁻¹)	Global EO (Mg C ha⁻¹ yr⁻¹)	Percentage difference (global EO/NGHGI) (%)
Amazonia	0.48	0.59 (0.24)	+ 23
Atlantic Forest	0.44	0.59 (0.24)	+ 34
Cerrado	0.2	0.24 (0.59)	+ 20
Pantanal	0.2	0.24	+ 20
Pampa	0.44	NA (0.59 = Old SF)	+ 34
Caatinga	0.1	0.95	+ 850

For all datasets, values include above and below ground carbon. The National Greenhouse Gas Inventory (NGHGI) and SEEG) [38] applied a single, biome-specific, removal factor for each biome. The calculated modal removal factor in each biome for the Global Earth Observation (EO) dataset [17] (see “Methodology”) is shown. Values in brackets indicate old-growth removal factors also used but where the associated ecozone did not account for a large area within the biome. In the Pampa biome the Global EO did not detect any old-growth (primary forest) areas and only old secondary forest (Old SF) regions were identified

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