Articles | Volume 25, issue 10
Research article
11 Oct 2021
Research article |  | 11 Oct 2021

Depth to water table correction for initial carbon-14 activities in groundwater mean residence time estimation

Dylan J. Irvine, Cameron Wood, Ian Cartwright, and Tanya Oliver


Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on hess-2021-276', Marina GILLON, 24 Jun 2021
    • AC1: 'Reply on RC1', Dylan Irvine, 09 Aug 2021
  • RC2: 'Comment on hess-2021-276', Anonymous Referee #2, 23 Jul 2021
    • AC2: 'Reply on RC2', Dylan Irvine, 09 Aug 2021

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision
ED: Publish subject to minor revisions (further review by editor) (30 Aug 2021) by Markus Hrachowitz
AR by Dylan Irvine on behalf of the Authors (09 Sep 2021)  Author's response    Author's tracked changes    Manuscript
ED: Publish as is (10 Sep 2021) by Markus Hrachowitz
Short summary
It is widely assumed that 14C is in contact with the atmosphere until recharging water reaches the water table. Unsaturated zone (UZ) studies have shown that 14C decreases with depth below the land surface. We produce a relationship between UZ 14C and depth to the water table to estimate input 14C activities for groundwater age estimation. Application of the new relationship shows that it is important for UZ processes to be considered in groundwater mean residence time estimation.