These are the H2 mixing ratio and deuterium content data used in: 
Batenburg, A. M., Walter, S., Pieterse, G., Levin, I., Schmidt, M., Jordan, A., Hammer, S., Yver, C., and Röckmann, T.: Temporal and spatial variability of the stable isotopic composition of atmospheric molecular hydrogen: observations at six EUROHYDROS stations, Atmos. Chem. Phys., 11, 6985-6999, doi:10.5194/acp-11-6985-2011, 2011,http://www.atmos-chem-phys.net/11/6985/2011/acp-11-6985-2011.html
 
Please cite this ACP article when using these data in a publication, and kindly notify the first author (annekebatenburg@gmail.com).
 
In the CSV files:
- Mixing ratios are reduction gas analyzer results obtained at UHEI-IUP, MPI-BGC and LSCE.
- dD(H2) data are obtained from analysis with the GC-IRMS system at the IMAU-APCG lab of Utrecht University. The estimated standard deviation/error in a single measurement is 4.5 permil, based on measurements of a laboratory working tank.
- Outlier selection was based on visual inspection of the time series.
- The "biased" or "downshifted" flag indicates dD measurements performed in a period where the dD results seemed to have a positive bias of approximately 9.5 permil. These samples were shown in the time series figure with the 9.5 permil subtracted, but excluded from the following quantitative analyses.
- The last column indicates the number of succesfull repeat measurements of dD.
 
More information can be found in the published, open-access article. Please do not hesitate to contact annekebatenburg@gmail.com if you have any questions.