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Isotope fractionation factors

Calculate isotope fractionation factors for given temperatures.

a18_c_H2O()
18O/16O fractionation factor between carbonate and water
a18_CO2acid_c()
18O/16O acid fractionation factor
a18_CO2g_H2O()
18O/16O fractionation factor between CO2(g) and H2O(l)
a18_CO2aq_H2O()
18O/16O fractionation factor between CO2(aq) and H2O(l)
a18_CO3_H2O()
18O/16O fractionation factor between CO3(2-) and H2O
a18_HCO3_H2O()
18O/16O fractionation factor between HCO3(-) and H2O
a18_H2O_OH()
18O/16O fractionation factor between water and hydroxide ion
a13_CO2g_CO2aq()
13C/12C fractionation factor between CO2(g) and CO2(aq)

Oxygen isotopes

d18O_c()
Equilibrium carbonate d18O value
d17O_c()
Triple oxygen isotope values of carbonates
d17O_qz()
Triple oxygen isotope values of quartz
d18O_H2O()
Water d18O value
temp_d18O()
Oxygen isotope thermometry
mix_d17O()
Mixing curves in triple oxygen isotope space

Scale conversion

to_VSMOW()
Converting isotope delta from VPDB to VSMOW
to_VPDB()
Converting isotope delta from VSMOW to VPDB

Clumped isotopes

D47()
Equilibrium carbonate D47 value
D48()
Equilibrium carbonate D47 value
temp_D47()
Clumped isotope thermometry
temp_D48()
Dual clumped isotope thermometry

Modeling the DIC system

X_absorption()
Relative rates of CO2 absorption reactions
X_DIC()
Dissolved inorganic carbon species

Datasets

Quick access to important datasets.

devilshole
Devils Hole carbonate d18O time series
LR04
A Pliocene-Pleistocene benthic foraminifera d18O stack
GTS2020
Oxygen isotope stratigraphy from the Geologic Time Scale 2020: macrofossils
meteoric_water
Oxygen isotope values for meteoric waters

Helpers

a_A_B()
Isotope fractionation factor between A and B
A_from_a()
Isotope delta from fractionation factor
B_from_a()
Isotope delta from fractionation factor
D17O()
Triple oxygen isotope value
epsilon()
Isotope fractionation value
prime()
Converting delta to delta prime
unprime()
Converting delta prime to delta
york_fit()
Error-considering linear regression
york_plot()
Regression confidence intervals