Fig. 6
From: Spatially-integrated estimates of net ecosystem exchange and methane fluxes from Canadian peatlands
Regression tree predicting average daily net ecosystem exchange (g CO2 m−2 day−1) from peatlands from climate parameters (r2 = 0.40). Ovals represent intermediate nodes and mean value of number of observations within the node. Boxes are terminal nodes and mean value and number of observations within node. Climate factors and split values are indicated above the nodes. Iso is isothermality, SD of GS is start date of growing season, and MTWQ is mean temperature of warmest quarter of the year