tens.to.sapflow: Convert tension into sap flow density

In TDPanalysis: Granier's Sap Flow Sensors (TDP) Analysis

Description

Use the Granier formula to convert tension into sap flow density using daily or mean Tmax

Usage

tens.to.sapflow(tension, Tmax)

Arguments

tension	Vector with tension.
Tmax	Vector with corresponding maximums of tension.

Value

Return a numerical vector containing the sap flow density

References

Granier A. 1985. A new method of sap flow measurement in tree stems. Annales Des Sciences Forestieres 42(2): 193-200.

Granier A. 1987. Evaluation of transpiration in a douglas-fir stand by means of sap flow measurements. Tree Physiology 3(4): 309-319.

Examples

Tmax = c(rep(2.5, times=5), rep(2.7, times=5), rep(3.2, times=5), rep(3.4, times=5))
tension = c(5:25)
tens.to.sapflow(tension=tension, Tmax=Tmax)

Example output

 [1] NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN
[20] NaN NaN
Warning message:
In Tmax - tension :
  longer object length is not a multiple of shorter object length

TDPanalysis documentation built on Feb. 28, 2020, 9:09 a.m.