Description Usage Arguments Value References
View source: R/d18O_evap_functions.R
Calculates the d18O isotope composition of the atmosphere based on Equation 18 and the definition for espilon+ in the explanation for Equation 3 in Gibson et al. (2016). Alternatively, can instead calcuate this value based on Equation 1.10 and the definition for epsilon in the explanation for Equation 1.4 in Mook (2000).
1 | d18O_evap_d18O_atm(d18O_pcpn, alpha, method = "Mook_corrected", k = 1)
|
d18O_pcpn |
isotopic composition of precipitation |
alpha |
equilibrium isotope fractionation factor (-) at the temperature of the air-water interface in LV form (i.e., alpha > 1). |
method |
defaults to "Gibson" to use those equations, can also be "Mook". |
k |
weighted factor which reflects seasonality, ranging from 0.5 for highly seasonal climates to 1 for non-seasonal climates. Defaults to 0.8 |
d18O_atm - the d18O isotope composition of the atmosphere
Gibson, J.J., S.J. Birks, and Y. Yi. 2016. Stable isotope mass balance of lakes: a contemporary perspective. Quaternary Science Reviews, 131:316-328. https://doi.org/10.1016/j.quascirev.2015.04.013
Mook, W.G. (ed.) 2000. Environmental Isotopes in the Hydrologic Cycle: Volume III: Surface Water. UNESCO. Paris, France.
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