vaporPressure: (Saturation) vapor pressure

In environmentalinformatics-marburg/reset: Remote Sensing-Based Evapotranspiration

Description

Calculate actual (Peng et al. 2006) and saturation vapor pressure (Allen and Robinson 2007) from air temperature and, in the case of the former, relative air humidity.

Usage

vaporPressure(ta, rh)

vaporPressureSat(ta, slope = FALSE)

Arguments

ta	Air temperature (deg C).
rh	Relative humidity (%).
slope	logical. If TRUE, the slope of the saturation vapor pressure curve is returned rather than the actual saturation vapor pressure.

Value

The actual (or saturation) vapor pressure (kPa) or, if slope = TRUE, the slope of the saturation vapor pressure curve (kPa / deg C).

Functions

• vaporPressureSat: Saturation vapor pressure in kPa.

References

Allen RG, Robinson CW (2007) Evapotranspiration and Consumptive Irrigation Water Requirements for Idaho. University of Idaho Research and Extension Center: Kimberly, Idaho, USA.

Dingman LS (2008) Physical Hydrology. Waveland Press Inc.: Long Grove, Illinois, USA.

Jensen ME, Burman RD, Allen RG (1990) Evapotranspiration and Irrigation Water Requirements. ASCE Manuals and Reports on Engineering Practices No. 70. American Society of Civil Engineers: New York, New York, USA.

Murray FW (1967) On the Computation of Saturation Vapor Pressure. Journal of Applied Meteorology 6: 203–204, doi:10.1175/1520-0450(1967)006<0203:OTCOSV>2.0.CO;2.

Peng G, Li J, Chen Y, Norizan AP, Tay L (2006) High-resolution Surface Relative Humidity Computation Using MODIS Image in Peninsular Malaysia. Chinese Geographical Science 16(3): 260–264, doi:10.1007/s11769-006-0260-6.

Tetens O (1930) Ueber einige meteorologische Begriffe. Zeitschrift fuer Geophysik 6: 297–309.

environmentalinformatics-marburg/reset documentation built on May 16, 2019, 7:54 a.m.