Figure 4.

Diurnal median comparisons of the estimated latent heat (LH) from the photosynthesis approaches used by JULES [Clark et al., 2011], Song et al. [2009], and photosynthesis-based PX LSM (PX PSN) to compute three potential assimilation rates (A_c, A_j, and A_e), with LH from the PX LSM Jarvis approach [Pleim and Xiu, 1995] and observations at the FLUXNET Harvard Forest US-Ha1 site [Urbanski et al., 2007]. The broadleaf C₃ plant simulations use July 2006 US-Ha1 standardized L2 data, with canopy height = 25 m, x = 1 (spherical leaf), α_leaf = 0.8 for PAR (leaf absorptivity), α_leaf = 0.2 for NIR, forest floor reflectance = 0.10, V_{CMAX25_0} = 30×10⁻⁶ mol m⁻² s⁻¹, k_n = 0.17, T_low = 0.0 °C, T_up = 36 °C, leaf scattering coefficient 0.15, quantum yield ε = 0.08 (mol CO₂ mol⁻¹ photon), and Jarvis R_stmin = 200 s m⁻¹.