This ugly function is present out of necessity, and will only exist for as long as it is necessary. It is an internal correction within the NEONiso calibration routines that is required as there are some mismatches between the 'true' isotope reference values and those in the NEON HDF5 files. NEON is working on correcting this, and after it has been corrected, this function has no need to exist and will be immediately deprecated. As a result, this function is fairly messy but there is little incentive to improve it.
Usage
correct_carbon_ref_cval(
std_frame,
site,
omit_already_corrected = TRUE,
co2_tol = 5,
d13c_tol = 0.25
)Arguments
- std_frame
Standard data frame to perform swap on.
- site
NEON four letter site code.
- omit_already_corrected
Should we attempt correction, if it's already been corrected in the raw files.
- co2_tol
Tolerance to use to select co2 values that need to be replaced, in ppm. Default = 5 ppm.
- d13c_tol
Tolerance to use to select d13C values that need to be replaced, in ppm. Default = 0.25 per mil.
Value
A data.frame, based on std_frame, where NEON-supplied
reference values have been corrected if a mismatch has previously
been identified.
Author
Rich Fiorella rfiorella@lanl.gov