Articles | Volume 19, issue 6
Hydrol. Earth Syst. Sci., 19, 2775–2789, 2015
https://doi.org/10.5194/hess-19-2775-2015
Hydrol. Earth Syst. Sci., 19, 2775–2789, 2015
https://doi.org/10.5194/hess-19-2775-2015

Research article 17 Jun 2015

Research article | 17 Jun 2015

Assessment of Halon-1301 as a groundwater age tracer

M. Beyer et al.

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ED: Publish subject to minor revisions (Editor review) (18 May 2015) by Markus Hrachowitz
AR by Anna Wenzel on behalf of the Authors (21 May 2015)  Author's response    Manuscript
ED: Publish as is (21 May 2015) by Markus Hrachowitz
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Short summary
We assess the potential of Halon-1301 as a new groundwater age tracer, which had not been assessed in detail. We determine Halon-1301 and infer age in 17 New Zealand groundwater samples and various modern waters. Halon-1301 reliably inferred age in 71% of the sites within 1 SD of the ages inferred from tritium and SF6. The remaining (anoxic) waters show reduced concentrations of Halon-1301 along with even further reduced concentrations of CFCs. The reason(s) for this need to be further assessed.