Articles | Volume 27, issue 1
Research article
 | Highlight paper
13 Jan 2023
Research article | Highlight paper |  | 13 Jan 2023

Droughts can reduce the nitrogen retention capacity of catchments

Carolin Winter, Tam V. Nguyen, Andreas Musolff, Stefanie R. Lutz, Michael Rode, Rohini Kumar, and Jan H. Fleckenstein


Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2022-431', Anonymous Referee #1, 13 Jul 2022
    • AC1: 'Response to Reviewer 1', Carolin Winter, 17 Aug 2022
  • RC2: 'Comment on egusphere-2022-431', Anonymous Referee #2, 21 Jul 2022
    • AC2: 'Resonse to Reviewer 2', Carolin Winter, 17 Aug 2022

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision | EF: Editorial file upload
ED: Publish subject to revisions (further review by editor and referees) (20 Oct 2022) by Matthew Hipsey
AR by Carolin Winter on behalf of the Authors (31 Oct 2022)  Author's response   Author's tracked changes   Manuscript 
ED: Referee Nomination & Report Request started (04 Nov 2022) by Matthew Hipsey
RR by Jens Lange (06 Dec 2022)
ED: Publish as is (19 Dec 2022) by Matthew Hipsey
AR by Carolin Winter on behalf of the Authors (02 Jan 2023)  Manuscript 
Executive editor
Understanding how catchments respond to change is a central theme of the work of many hydrologists around the world, however, it is fair to say that the vast majority of these studies have focused on water quantity. This study is unique in that it represents a very detailed treatment of how water quality changes due to drought, which is a topic that is becoming ever so important with the rapid changes happening in warming climate for many regions of the world. The authors very cleverly combine both complex models and data-driven analyses to elucidate the effects of extreme drought on river water quality.
Short summary
The increasing frequency of severe and prolonged droughts threatens our freshwater resources. While we understand drought impacts on water quantity, its effects on water quality remain largely unknown. Here, we studied the impact of the unprecedented 2018–2019 drought in Central Europe on nitrate export in a heterogeneous mesoscale catchment in Germany. We show that severe drought can reduce a catchment's capacity to retain nitrogen, intensifying the internal pollution and export of nitrate.