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(a) CO2 response of net assimilation rate (An) for leaf temperature (T) of 25°C (black) or 28°C (grey). Supply functions are shown to depict stomatal limitation for ambient CO2 partial pressure (Ca) at 28 Pa (preindustrial), 40 Pa (current) and 60 Pa (future predictions). (b) Temperature response of net assimilation rate (An) at ambient CO2 partial pressure of 40 Pa (black) or 60 Pa (grey). Vcmax = 130 µmol m−2 s−1, Jmax = 205 µmol m−2 s−1 [25].
