light.use.efficiency {bigleaf}

Light-Use Efficiency (LUE)

Description

Amount of carbon fixed (GPP) per incoming light.

Usage

light.use.efficiency(GPP, PPFD)

Arguments

GPP

Gross ecosystem productivity (umol CO2 m-2 s-1)

PPFD

Photosynthetic photon flux density (umol quanta m-2 s-1)

Details

Light use efficiency is calculated as

LUE = sum(GPP)/sum(PPFD)

where both GPP and PPFD are in umol m-2 s-1. A more meaningful (as directly comparable across ecosystems) approach is to take absorbed PPFD rather than incoming PPFD as used here.

Value

LUE -

Light use efficiency (-)

See Also

energy.use.efficiency

Examples

light.use.efficiency(GPP=20,PPFD=1500)