28.1.127 PIWebb

Function

y = P_{m}\left (1-e^{-\frac {\alpha \cdot x}{P_{m}}}\right )

Brief Description

Model of photosynthesis vs. irradiance curve by Webb

Sample Curve

PIWebb FitFunc.png

Parameters

Number: 2

Names: Pm, alpha

Meanings: Pm = photosynthetic capacity, alpha = photosynthetic efficiency

Lower Bounds: Pm > 0, alpha > 0

Upper Bounds: none

Derived Parameters

Refer to the curve in Sample Curve section:

Half-saturation constant: Ik = ln(2)*Pm/alpha

Script Access

nlf_PIWebb(x,Pm,alpha)

Function File

PIWebb.FDF

Category

Exponential