Fig. 6

Temporal changes in CWSIh1 and CWSIh2 during 8:00–18:00 under (a) well-watered conditions and (b) water stressed conditions. The CWSIh1 is the CWSI calculated using the lower limit of the canopy-air temperature difference of the CWSIs and the upper limit of the canopy-air temperature difference of the CWSIt. The CWSIh2 is the CWSI calculated using the upper limit of canopy-air temperature difference of the CWSIs and the lower limit of canopy-air temperature difference of the CWSIt