Gradient of LRC_NonRect_predictLRC()

Gradient of LRC_NonRect_predictLRC()

LRC_NonRect_computeLRCGradient(
  theta,
  Rg,
  VPD,
  Temp,
  VPD0 = 10,
  fixVPD = (k == 0),
  TRef = 15
)

Arguments

theta

-> parameter vector ( theta1 = kVPD (k), theta2 = beta0 (beta), theta3 = alpha, theta4 = RRef (rb), # theta4 = E0, theta5 = logitconv)

Rg

photosynthetic flux density mumol / m2 / s or Global Radiation.

VPD

Vapor Pressure Deficit hPa

Temp

Temperature degC

VPD0

hPa, Parameters VPD0 fixed to 10 hPa according to Lasslop et al 2010

fixVPD

if TRUE the VPD effect is not considered and VPD is not part of the computation

TRef

numeric scalar of Temperature (degree Celsius) for reference respiration RRef

Details

This function computes the gradient of the Nonrectangular Light Response Curve function with respect to the parameters.

Differs from base by extracting conv parameter from theta and adding gradient to logitconv (3rd parameter from computeGPPGradient).