Cavity ring-down laser spectrometer (L2120-i, Picarro, Inc., Santa Clara, CA, USA).Measurements with standard deviations >2 per mill and >0.5 per mill for 2H and 18O were set to NA.Sample ID: name of the sample(atm = atmosphere, STD = standard) which was initially measured according to the sampling protocol (detailed overview in dataset "Timefile used for the calculation of the isotopic compositions for the different samples" in this collection)