cal_atmosphericPressure {simET}

Calculating atmospheric pressure

Description

The atmospheric pressure, P, is the pressure exerted by the weight of the earth's atmosphere.

Usage

cal_atmosphericPressure(elevation)

Arguments

elevation

elevation above sea level (m)

Details

Assuming 20°C for a standard atmosphere. Evaporation at high altitudes is promoted due to low atmospheric pressure as expressed in thepsychrometric constant. The effect is, however, small and in the calculation procedures, the average value for a location is sufficient.

Value

A vector for atmospheric pressure (Kpa)

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.

Examples

cal_atmosphericPressure(100)