dejong_shappert_flux: Internal function to compute surface co2 flux at a given...

In jmzobitz/NEONSoils: Compute Soil Carbon Fluxes for the National Ecological Observatory Network Sites

Internal function to compute surface co2 flux at a given timepoint via De Jong and Schappert (1972)

Description

Given zOffsets, diffusivity, and co2 (umol mol-1) and their associated errors, compute the surface flux. This is done by estimating the surface concentration (through linear regression) and doing a gradient calculation. Modified from De Jong and Schappert (1972).

Usage

dejong_shappert_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 [e-mail]

References

Jong, E. De, and H. J. V. Schappert. 1972. “Calculation of Soil Respiration and Activity from CO2 Profiles in the Soil.” Soil Science 113 (5): 328.

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

[hirano_flux()], [tang_2003_flux()], [tang_2005_flux()] for other ways to compute surface fluxes.

jmzobitz/NEONSoils documentation built on May 31, 2024, 12:20 p.m.