A framework for deriving drought indicators from the Gravity Recovery and Climate Experiment (GRACE)

Gerdener, Helena; Engels, Olga; Kusche, Jürgen

doi:https://doi.org/10.5194/hess-24-227-2020

Articles | Volume 24, issue 1

https://doi.org/10.5194/hess-24-227-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/hess-24-227-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 24, issue 1

Research article

|

16 Jan 2020

Research article |

| 16 Jan 2020

A framework for deriving drought indicators from the Gravity Recovery and Climate Experiment (GRACE)

Helena Gerdener, Olga Engels, and Jürgen Kusche

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Final revised paper (published on 16 Jan 2020)
Preprint (discussion started on 19 Jun 2019)

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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RC1: 'Review of the manuscript “A framework for deriving drought indicators from GRACE” by Gerdener et al.', Anonymous Referee #1, 20 Aug 2019
- AC1: 'Interactive comment on "A framework for deriving drought indicators from GRACE" by Helena Gerdener et al.', Helena Gerdener, 04 Oct 2019
RC2: 'Review of HESS-20190268', Anonymous Referee #2, 13 Sep 2019
- AC2: 'Interactive comment on "A framework for deriving drought indicators from GRACE" by Helena Gerdener et al.', Helena Gerdener, 04 Oct 2019
EC1: 'Editor comment', Bettina Schaefli, 13 Sep 2019
- AC3: 'Interactive comment on "A framework for deriving drought indicators from GRACE" by Helena Gerdener et al.', Helena Gerdener, 04 Oct 2019

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

ED: Reconsider after major revisions (further review by editor and referees) (09 Oct 2019) by Bettina Schaefli

AR by Helena Gerdener on behalf of the Authors (16 Oct 2019) Author's response Manuscript

ED: Referee Nomination & Report Request started (23 Oct 2019) by Bettina Schaefli

RR by Anonymous Referee #1 (26 Nov 2019)

ED: Publish as is (10 Dec 2019) by Bettina Schaefli

AR by Helena Gerdener on behalf of the Authors (11 Dec 2019)

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Short summary

GRACE-derived drought indicators enable us to detect hydrological droughts based on changes observed in all storages. By performing synthetic experiments, we find that droughts identified by existing and modified indicators are biased by trends and GRACE-based spatial noise. A modified version of the Zhao et al. (2017) indicator is found to be particularly robust against spatial noise and is therefore applied to real GRACE data over South Africa.