FIGURE 7.

Univariate functional ecosystem relationships between gross CO₂ fluxes retrieved by NN_C‐part (black lines) and FLUXNET standard methods (green and red lines for nighttime method and daytime method, respectively): gross primary production (GPP; µmol CO₂ m⁻² s⁻¹) and SW_IN (W/m²; a–d), GPP (µmol CO₂ m⁻² s⁻¹) and VPD (kPa; e–h), ecosystem respiration (µmol CO₂ m⁻² s⁻¹) and TA (°C; i–l). These patterns are derived from study sites located at the northern hemisphere (latitude > +15°N)