d18O_evap_d18O_atm: Atmosphere d18O

In cvoter/isoH2Obudget: Lake Water Budget Using Stable Isotopes

Description

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).

Usage

d18O_evap_d18O_atm(d18O_pcpn, alpha, method = "Mook_corrected", k = 1)

Arguments

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

Value

d18O_atm - the d18O isotope composition of the atmosphere

References

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.

cvoter/isoH2Obudget documentation built on March 29, 2020, 11:07 a.m.