| cal_TemMean {simET} | R Documentation |
calculating the mean daily air temperature
Description
calculating the mean daily air temperature
Usage
cal_TemMean(Tmax, Tmin)
Arguments
Tmax |
the daily maximum.The temperature is given in degree Celsius or Fahrenhei. |
Tmin |
the daily minimum.The temperature is given in degree Celsius,or Fahrenhei. |
Details
It is only employed in the FAO Penman-Monteith equation to calculate the slope of the saturation vapor pressure curves and the impact of mean air density as the effect of temperature variations on the value of the climatic parameter is small in these cases. For standardization, Tmean for 24-hour periods is defined as the mean of mean of the daily maximum and minimum temperatures rather than as the average of hourly temperature measurements.
Value
A vector for the mean daily air temperature
References
Allen, R. G., Pereira, L. S., Raes, D., & Smith, M. FAO Irrigation and drainage paper No. 56. Rome: Food and Agriculture Organization of the United Nations, 1998.