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Table 3 Correlation coefficients determined for canopy temperature and dT with climate conditions measured at the same time, as daily averages and as cumulated values for precipitation

From: Remote, aerial phenotyping of maize traits with a mobile multi-sensor approach

Climate parameters   Canopy temperature dT
   °C °C
Canopy temperature (TC) °C 1 *** 0.72
Air temperature (TA) °C 0.96 ** 0.51
Daily maximum temperature (TM) °C 0.93 * 0.7
Gust speed m s−1 −0.58 −0.14
Vapour pressure deficit (VPD) kPa 0.23 −0.06
Actual radiation μmol s−1 m−2 0.68 0.89 *
Precipitation (7 days cumulated) mm 0.26 0.44
Evapotranspiration (ETo) mm day−1 0.45 0.88 *
Sun hours h day−1 0.74 0.97 **
  1. Thermal data from das 1275°Cd, was excluded because plants showed already advanced senescence.
  2. Significance codes are: ‘***’ p-value < 0.001, ‘**’ p-value < 0.01 and ‘*’p-value < 0.05.