There are a few suspected instances where the water isotope ratios for oxygen and hydrogen have been flipped in the reference data. This function corrects them until they are corrected in the NEON database using a d-excess filter.
swap_standard_isotoperatios(std_frame, dxs_thres = 500)
Standard data frame to perform swap on.
d-excess threshold to indicate when to swap.
A data.frame based on
std_frame, where d18O and
d2H values have been swapped from NEON input files if
determined to have a reference value mismatch. Mismatch
is determined based on the d-excess of the standard (=
d2H - 8*d18O), using a value of 500 by default.
Rich Fiorella email@example.com
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