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simET (version 1.0.3)

cal_TemMean: calculating the mean daily air temperature

Description

calculating the mean daily air temperature

Usage

cal_TemMean(Tmax, Tmin)

Value

A vector for the mean daily air temperature

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.

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.