H2 mixing ratio and isotope data from CARIBIC project

<div>This zip file contains the final corrected data that were used for the paper: Batenburg, A. M., Schuck, T. J., Baker, A. K., Zahn, A., Brenninkmeijer, C. A. M., and Röckmann, T.: The stable isotopic composition of molecular hydrogen in the tropopause region probed by the CARIBIC aircraft, Atmos. Chem. Phys., 12, 4633-4646, doi:10.5194/acp-12-4633-2012, 2012</div><div>Please cite this paper when using these data.</div><div>The paper also contains more information about how these data were collected and calibrated.</div><div><br></div><div>H2 and deltaD(H2) are calibrated using one, two, or three laboratory reference air cylinders, depending on measurement period.</div><div>The H2 mixing ratio of the reference cylinders was determined by UHEI-IUP or MPI-BGC.</div><div>The deltaD(H2) of the reference cylinders is linked to the VMOW scale by measurements of air mixtures containing H2 standards of known isotopic composition.</div><div>H2 scale: MPI2009, Jordan and Steinberg, AMT, 2011</div><div>deltaD(H2) units: permil deviation from VSMOW, Gonfiantini et al., IAEA-TECDOC-825, IAEA</div><div>An empirical correction was applied to the H2 mixing ratios based on data collected within the EUROHYDROS project.</div><div>H2 mixing ratio errors can be calculated as 2.5% of the mixing ratio divided by the square root of the number of GC-IRMS repeat measurements.</div><div>deltaD(H2) errors can be calculated as 4.5 permil divided by the square root of the number of GC-IRMS repeat measurements.</div><div>More information on the collection of these samples and their measurement can be found in Batenburg et al., ACP, 2012, doi:10.5194/acp-12-4633-2012.</div><div>More detailed information on the GC-IRMS measurement procedure can be found in Batenburg et al., ACP, 2011, doi:10.5194/acp-11-6985-2011.</div><div>The 0 or 1 pollution/outlier flags were assigned by an iterative procedure that is described Batenburg et al., 2012.</div><div><br></div><div>The zip file contains the data in .xls and .csv format, as well as in the NASA AMES text format that is used within the CARIBIC project.</div><div>We thank Armin Rauthe-Schöch for generating the AMES file.</div><div><br></div><div>The corresponding author of the paper can be reached through annekebatenburg you-know-what-symbol gmail.com for questions about the hydrogen measurements.</div><div>For the results of other measurements that were done on these samples (like the GHG measurements), it's better to contact someone involved with the CARIBIC/IAGOS database. Armin Rauthe-Schöch (armin.rauthe-schoech you-know-what-symbol mpic.de) can probably help you out.