PROSPECT-5B radiative transfer model (Asteraceae)

Knowledge graph centered on PROSPECT-5B radiative transfer model (Asteraceae) with 66 nodes and 129 connections. Top connected: Barbey's Larkspur, Potentilla gracilis, Artemisia tridentata, Erigeron speciosus, Artemisia.

Method synopsis

Inversion of the PROSPECT-5B radiative transfer model to estimate leaf transmittance from reflectance measurements for calculation of leaf absorptance across the 400-2,500 nm spectral range.

Synthesized from method descriptions across 1 paper using this protocol.

Procedure from a recent peer-reviewed implementation

Steps below were extracted from the most recent peer-reviewed implementation of this protocol in the corpus — Low predictability of energy balance traits and leaf temperature metrics in desert, montane and alpine plant communities (2020), Functional Ecology. Implementations in other papers (listed below) may differ.

1. Measure leaf spectral properties
   Measure leaf absorptance (dimensionless) using a field spectroradiometer (ASD, FieldSpec HandHeld 2) calibrated against white and black references before usage. Measure spectral reflectance (R) from 325 to 1,075 nm over three replicates per leaf. Estimate transmittance (T) at each wavelength from R = 2,500 nm via inversion of the PROSPECT-5B radiative transfer model after optimization to correspond with reflectance data from 400 to 1,075 nm. Calculate absorptance as the mean value of 1 - T - R across the spectral band 400-2,500 nm.
   Quantities: Spectral measurements 325-1,075 nm, 3 replicates per leaf, 715/757 spectra retained after quality controlDuration: Field measurements with immediate calibrationConditions: Field conditions with white and black reference calibration
   Equipment: field spectroradiometer (ASD, FieldSpec HandHeld 2), white and black references

Typical Equipment

• field spectroradiometer (ASD, FieldSpec HandHeld 2)

Output Measurements

• leaf transmittance
• leaf absorptance

Papers Using This Protocol (1)

Species Studied With This Protocol

Places Where Used