hirano_flux {neonSoilFlux}

Internal function to compute surface co2 flux at a given timepoint via Hirano et al 2005

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 linear extrapolation of the bottom and top surface fluxes. Modified from Hirano et al (2005).

Usage

hirano_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

Hirano, Takashi, Honghyun Kim, and Yumiko Tanaka. 2003. “Long-Term Half-Hourly Measurement of Soil CO2 Concentration and Soil Respiration in a Temperate Deciduous Forest.” Journal of Geophysical Research: Atmospheres 108 (D20). https://doi.org/10.1029/2003JD003766.

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