Impact of rising temperatures on the biomass of humid old-growth forests of the world

Table 1 Four latitudinal zones, their areas, estimated GPP, MCB, AGB (old-growth above-ground biomass) and net C flux assuming that 47.6% of AGB is C [65] for the studied humid lowland forests

Zone (latitudes)	Total area (million km²)	Current mean GPP (kg m⁻² year⁻¹)	Future mean GPP (kg m⁻² year⁻¹)	Current mean MCB (year⁻¹)	Future mean MCB (year⁻¹)	Current mean AGB (kg m⁻²)	Future mean AGB (kg m⁻²)	Mean AGB change (kg m⁻²)	Total C change (Pg)
Boreal (55° N–90° N)	11.0	0.70	0.92	0.11	0.14	10.06	11.59	1.52	8
North temperate (23.5° N–55° N)	15.9	1.58	1.73	0.18	0.22	22.36	18.33	− 4.03	− 30
Tropics (23.5° S–23.5° N)	21.7	3.21	2.95	0.31	0.35	37.67	22.18	− 15.50	− 160
South (90° S–23.5° S)	3.2	2.33	2.42	0.21	0.24	41.66	35.15	− 6.51	− 10
World	51.7	2.13	2.11	0.22	0.26	27.37	19.55	− 7.82	− 193

Current values were estimated based on the climate of 1970–2000 and future values based on a projected climate for 2081–2100

ISSN: 1750-0680