Atmospheric CO2 mole fraction data of CONTRAIL-CME

This data set contains CO2 mole fractions observed by Continuous CO2 Measuring Equipment (CME) onboard commercial aircraft under the CONTRAIL (Comprehensive Observation Network for TRace gases by AIrLiner) project. The project started in 2005 with two Boeing 747-400 aircraft and three 777-200ER aircraft operated by Japan Airlines (JAL) between Japan and Europe, Asia, Australia, Hawaii and North America. As of 2017, eight 777-200ER and two 777-300ER aircraft are used for the CME observation. The mole fraction values are obtained from 10-second average values of the CME signals for the ascending and descending portion of the flight and from 1-minute averages for the cruise. This data set contains the most recently obtained data, whose QA/QC is still in progress. Because of this, the citation policy and format are different from those of the regular data (Machida et al., 2018). Please read carefully the citation policy written below. Furthermore, a password is required to download the data, which can be obtained by contacting the CONTRAIL PIs ([e-mail]). Note that these data will be merged into the regular data set at the next major update.