Articles | Volume 16, issue 24
Biogeosciences, 16, 4747–4763, 2019
https://doi.org/10.5194/bg-16-4747-2019
Biogeosciences, 16, 4747–4763, 2019
https://doi.org/10.5194/bg-16-4747-2019

Research article 16 Dec 2019

Research article | 16 Dec 2019

Long-term trends in pH in Japanese coastal seawater

Miho Ishizu et al.

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Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
ED: Reconsider after major revisions (15 Jul 2019) by Jean-Pierre Gattuso
AR by Svenja Lange on behalf of the Authors (29 Aug 2019)  Author's response
ED: Referee Nomination & Report Request started (29 Aug 2019) by Jean-Pierre Gattuso
RR by Anonymous Referee #2 (10 Sep 2019)
RR by Abed El Rahman Hassoun (21 Sep 2019)
ED: Reconsider after major revisions (01 Oct 2019) by Jean-Pierre Gattuso
AR by miho ishizu on behalf of the Authors (23 Oct 2019)  Author's response    Manuscript
ED: Referee Nomination & Report Request started (23 Oct 2019) by Jean-Pierre Gattuso
RR by Anonymous Referee #2 (05 Nov 2019)
ED: Publish subject to technical corrections (05 Nov 2019) by Jean-Pierre Gattuso
AR by miho ishizu on behalf of the Authors (12 Nov 2019)  Author's response    Manuscript
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Short summary
Using water quality data collected at 289 monitoring sites as part of the Water Pollution Control Program, we evaluated the long-term trends of pH in Japanese coastal seawater at ambient temperature from 1978 to 2009. We found that the annual maximum pH, which generally represents the pH of surface waters in winter, had decreased at 75 % of the sites, but had increased at the remaining sites. The annual maximum pH decreased at an average rate of −0.0024 yr−1, with relatively large deviations.
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