Hi Alex, Many thanks. I have only spotted one mistake from my side. In the readme file description I named 2 variables wrong. "spco2_raw" should be "spco2" and "fgco2_raw" should be "fgco2" to be consistent with the netcdf files. I have attached the updated readme file. Can you please update this on the website? Otherwise, all looks great! cheers Peter ----------------------------------------------- Peter Landschützer, PhD Max Planck Institute for Meteorology Bundesstr. 53 20146 Hamburg, Germany phone: +49 (0) 40 4117 3145 mpimet.mpg.de/~landschuetzer.peter Attachments: 740H20180228.exc.csv