Articles | Volume 18, issue 18
Biogeosciences, 18, 5247–5264, 2021
https://doi.org/10.5194/bg-18-5247-2021
Biogeosciences, 18, 5247–5264, 2021
https://doi.org/10.5194/bg-18-5247-2021

Research article 28 Sep 2021

Research article | 28 Sep 2021

Long-term spatiotemporal variations in and expansion of low-oxygen conditions in the Pearl River estuary: a study synthesizing observations during 1976–2017

Jiatang Hu et al.

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Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on bg-2020-480', Anonymous Referee #1, 16 Mar 2021
  • RC2: 'Review Comment on bg-2020-480', Anonymous Referee #2, 21 Apr 2021

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision
ED: Reconsider after major revisions (15 Jun 2021) by Peter Landschützer
AR by Jiatang Hu on behalf of the Authors (19 Jun 2021)  Author's response    Author's tracked changes    Manuscript
ED: Referee Nomination & Report Request started (06 Jul 2021) by Peter Landschützer
RR by Anonymous Referee #1 (28 Jul 2021)
RR by Anonymous Referee #2 (28 Jul 2021)
ED: Reconsider after major revisions (10 Aug 2021) by Peter Landschützer
AR by Jiatang Hu on behalf of the Authors (14 Aug 2021)  Author's response    Author's tracked changes    Manuscript
ED: Referee Nomination & Report Request started (26 Aug 2021) by Peter Landschützer
RR by Anonymous Referee #2 (01 Sep 2021)
ED: Publish as is (07 Sep 2021) by Peter Landschützer
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Short summary
In situ observations over 42 years were used to explore the long-term changes to low-oxygen conditions in the Pearl River estuary. Apparent expansion of the low-oxygen conditions in summer was identified, primarily due to the combined effects of increased anthropogenic inputs and decreased sediment load. Large areas of severe low-oxygen events were also observed in early autumn and were formed by distinct mechanisms. The estuary seems to be growing into a seasonal, estuary-wide hypoxic zone.
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