Table 2. Estimate of tropical dry forest biome area (km2), globally and in different regions, based on four bioclimatic definitions (Murphy and Lugo, Food and Agriculture Organization of the United Nations [FAO], DryFlor, Aridity Index) using two projections.
| Regions | Murphy & Lugo | FAO | DryFlor | Aridity Index |
|---|---|---|---|---|
| Global | 15,300,143 | 15,514,946 | 10,370,038 | 15,777,797 |
| 16,123,939 | 15,177,193 | 10,820,627 | 14,376,146 | |
| Africa | 6,825,248 | 7,480,815 | 5,005,193 | 8,000,948 |
| 7,237,338 | 7,700,711 | 5,243,736 | 7,420,821 | |
| North and Central America | 590,609 | 689,325 | 284,154 | 1,166,918 |
| 652,516 | 811,289 | 326,525 | 1,028,800 | |
| South America | 5,736,592 | 3,134,372 | 3,958,243 | 2,605,596 |
| 6,042,593 | 3,774,250 | 4,023,236 | 1,866,315 | |
| South Asia | 437,803 | 1,261,394 | 112,170 | 1,983,914 |
| 481,186 | 1,230,178 | 153,111 | 1,417,872 | |
| South East Asia/Pacific | 1,709,888 | 1,687,644 | 1,010,275 | 2,020,421 |
| 1,710,303 | 1,660,763 | 1,074,017 | 2,642,338 |
WorldClim data presented above CHELSA. Highest extents in bold.