Year RCP2.6 RCP4.5 RCP6.0 RCP8.5
P. americana 2050 + 1.7% + 1.2% + 2.7% + 2.3%
2070 + 1.6% + 1.1% + 2.0% + 0.7%
P. pennsylvanica 2050 + 0.5% 0 + 0.8% + 0.4%
2070 – 0.4% – 0.4% 0 0