NonrectangularLRCFitter predictGPP

Nonrectangular hyperbolic Light Response function for GPP

NonrectangularLRCFitter_predictGPP(Rg, Amax, 
    alpha, conv)

Arguments

Rg

ppfd [numeric] -> photosynthetic flux density [mumol / m2 / s] or Global Radiation

Amax

numeric scalar or vector of length(Rg): beta parameter adjusted for VPD effect

alpha

numeric scalar or vector of length(Rg): alpha parameter: initial slope

conv

numeric scalar or vector of length(Rg): convexity parameter (see details)

Details

This function generalizes the RectangularLRCFitter_predictGPP by adding the convexity parameter conv. For conv -> 0 (logitconv -> -Inf): approaches the rectangular hyperbolic. For conv -> 1 (logitconv -> + Inf): approaches a step function. Expected values of conv are about 0.7-0.9 (Moffat 2012).

Value

numeric vector of length(Rg) of GPP

Author

Department for Biogeochemical Integration at MPI-BGC, Jena, Germany <REddyProc-help@bgc-jena.mpg.de> [cph], Thomas Wutzler <twutz@bgc-jena.mpg.de> [aut, cre], Markus Reichstein <mreichstein@bgc-jena.mpg.de> [aut], Antje Maria Moffat <antje.moffat@bgc.mpg.de> [aut, trl], Olaf Menzer <omenzer@bgc-jena.mpg.de> [ctb], Mirco Migliavacca <mmiglia@bgc-jena.mpg.de> [aut], Kerstin Sickel <ksickel@bgc-jena.mpg.de> [ctb, trl], Ladislav <U+0160>igut <sigut.l@czechglobe.cz> [ctb]