tang_2003_flux {neonSoilFlux} | R Documentation |
Internal function to compute surface co2 flux at a given timepoint via Tang et al 2003
Description
Given zOffsets, diffusivity, and co2 (umol mol-1) and their associated errors, compute the surface flux. This is done by computing the gradient of co2 (slope from linear regression) and linear extrapolation of surface diffusivity. Modified from Tang et al (2003).
Usage
tang_2003_flux(zOffset, co2, co2_err, diffusive, diffusive_err)
Arguments
zOffset |
Required. depths below surface - assumed to be positive in value. Important for directionality! |
co2 |
Required. co2 at depth (umol m–1) |
co2_err |
Required. Associated errors with that value of co2 |
diffusive |
Required. diffusivity at each depth |
diffusive_err |
Required Associated errors with diffusivity |
Value
Data frame of fluxes associated error
Author(s)
John Zobitz zobitz@augsburg.edu
References
Tang, Jianwu, Dennis D Baldocchi, Ye Qi, and Liukang Xu. 2003. “Assessing Soil CO2 Efflux Using Continuous Measurements of CO2 Profiles in Soils with Small Solid-State Sensors.” Agricultural and Forest Meteorology 118 (3): 207–20. https://doi.org/10.1016/S0168-1923(03)00112-6.
Maier, M., and H. Schack-Kirchner. 2014. “Using the Gradient Method to Determine Soil Gas Flux: A Review.” Agricultural and Forest Meteorology 192–193 (July):78–95. https://doi.org/10.1016/j.agrformet.2014.03.006.
See Also
[dejong_shappert_flux()], [hirano_flux()], [tang_2005_flux()] for other ways to compute surface fluxes.