This data archive contains three files of gridded monthly-mean data for GEOS-Chem/MERRA2 simulations of D36 values along with CH4, CO, and O3 mixing ratios and relevant diagnostics and meteorology, two MATLAB software scripts for computing D36 values, and and one table of measured data:

GEOSChem.monmean.SOLVE.nc4	GEOS-Chem/MERRA2 simulations from 01-Jun-1998 through 31-May-2000 
GEOSChem.monmean.PD.2015.nc4	GEOS-Chem/MERRA2 simulations from 01-Jan-2015 through 31-Dec-2015 using preindustrial boundary conditions
GEOSChem.monmean.PI.2015.nc4	GEOS-Chem/MERRA2 simulations 01-Jan-2015 through 31-Dec-2015 
D36eq.m				MATLAB script for computing D36 values at isotopic equilibrium ("O2-only" scheme) based on a 6th-order polynomial fit to the results of Wang et al. (2004) and Yeung et al (2012).
D36Peq.m			MATLAB script for computing D36P values corresponding to a pressure-dependent photochemical steady state
Supplemental Data Table.xlsx	Isotopic, meteorological, and trace-gas data from the SEAC4RS campaign used in the study

Citation: Yeung, L. Y., L. T. Murray, A. Banerjee, ‡Y. Yan, X. Tie, E. L. Atlas, S. M. Schauffler, and K. A. Boering, “Online calculation of O2 clumped-isotope variations in an atmospheric chemistry model reveals an important contribution from ozone isotopologue chemistry,” submitted to JGR Atmospheres. Preprint doi: 10.1002/essoar.10506248.2