Supplementary material to "Heterogeneity and chemical reactivity of the remote troposphere defined by aircraft measurements"

The ATom mission was designed to collect a multi-species, detailed chemical climatology that documents the patterns of physical and chemical heterogeneity throughout the remote troposphere. The calculation of reactivities requires a complete set of key species in each air parcel to initialize chemistry models and then calculate the CH4 and O3 reactivities over a 24 h cycle. The ATom Modeling Data Stream (MDS) provides a semi-continuous set of 10 s air parcels with a full set of values for the key chemical reactants and conditions. This supplementary methods section documents the methods used to create MDS version 2 (MDS-2).