surface.CO2: CO2 Concentration at the Canopy Surface

In bigleaf: Physical and Physiological Ecosystem Properties from Eddy Covariance Data

CO2 Concentration at the Canopy Surface

Description

the CO2 concentration at the canopy surface derived from net ecosystem CO2 exchange and measured atmospheric CO2 concentration.

Usage

surface.CO2(Ca, NEE, Ga_CO2, Tair, pressure)

Arguments

Ca	Atmospheric CO2 concentration (umol mol-1)
NEE	Net ecosystem exchange (umol CO2 m-2 s-1)
Ga_CO2	Aerodynamic conductance for CO2 (m s-1)
Tair	Air temperature (degC)
pressure	Atmospheric pressure (kPa)

Details

CO2 concentration at the canopy surface is calculated as:

Ca_surf = Ca + NEE / Ga_CO2

Note that this equation can be used for any gas measured (with NEE replaced by the net exchange of the respective gas and Ga_CO2 by the Ga of that gas).

Value

Ca_surf -

CO2 concentration at the canopy surface (umol mol-1)

Note

the following sign convention is employed: negative values of NEE denote net CO2 uptake by the ecosystem.

Examples

surface.CO2(Ca=400,NEE=-30,Ga_CO2=0.05,Tair=25,pressure=100)

bigleaf documentation built on Aug. 22, 2022, 9:09 a.m.