Measurements of the abundance of acetylene and ethane in surface air flasks from Cape Grim, Australia (CGO) and South Pole, Antarctica (SPO) were made in the Saltzman/Aydin Research Group at the University of California, Irvine. The surface flasks are from the the NOAA Halocarbons and other Atmospheric Trace Species (HATS) monitoring network shared with UC Irvine by Dr. Stephen Montzka to compliment on-going ice core research at UC Irvine involving the same trace species. 

Surface air samples in glass flasks were collected at South Pole, Antarctica and Cape Grim, Australia following the protcol set by the NOAA HATS monitoring group: https://www.esrl.noaa.gov/gmd/hats/. The bi-monthly flask air samples were shipped to UC Irvine for analysis with gas chromatography (Agilent 6890 with DB-1 column) and high-resolution mass spectrometry (Waters AutoSpec Ultima in EI+ mode) for the abundance of ethane and acetylene. Details on the UC Irvine analysis system are found in Aydin et al., 2007 JGR. Two air flasks are collected from each sampling date and one of the flasks is analyzed twice, resulting in three measuremetns for each sampling date. 

Missing or excluded data are denoted with -999. Mixing ratios are repoted in units of pmol mol-1. Errors are also in units of pmol mol-1 and represent a one-sigma uncertainity.