How extreme river discharge events shape coastal biogeochemical dynamics: the 2024 northern Adriatic case

Di Biagio, Valeria; Querin, Stefano; Amadio, Carolina; Bolzon, Giorgio; Feudale, Laura; Piani, Stefano; Spada, Simone; Cossarini, Gianpiero

doi:10.5194/sp-7-osr10-18-2026

Articles | Volume 7-osr10

https://doi.org/10.5194/sp-7-osr10-18-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Report:

10th edition of the Copernicus Ocean State Report (OSR10)

https://doi.org/10.5194/sp-7-osr10-18-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 7-osr10

30 Sep 2026

| OSR10 | Chapter 4.4

| 30 Sep 2026 | OSR10 | Chapter 4.4

How extreme river discharge events shape coastal biogeochemical dynamics: the 2024 northern Adriatic case

Valeria Di Biagio, Stefano Querin, Carolina Amadio, Giorgio Bolzon, Laura Feudale, Stefano Piani, Simone Spada, and Gianpiero Cossarini

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Final revised paper (published on 30 Sep 2026)
Preprint (discussion started on 15 Sep 2025)

Interactive discussion

Status: closed

RC1:
'Comment on sp-2025-9', Anonymous Referee #1, 30 Oct 2025

The paper is interesting and well presented. It effectively communicates the research findings.
I have only minor suggestions:
Line 145: The authors could consider providing a definition of 'climatology' in the context of the study, such as 'climatology (long-term average)', to help clarify the terminology for non-specialists in the field.
Lines: 180-185 “increasing temperature (i.e., 11°C - 16°C, i.e., 2 °C - 3°C above the climatology)” is unclear. Do you mean “increasing temperature (temperature in the range 11°C - 16°C, i.e. 2 °C - 3°C above the climatology)”? Please clarify in the text.
Line 230 “HR” missing in the legend.
Comment for the editor: The study is not completely in my field of expertise

Citation: https://doi.org/10.5194/sp-2025-9-RC1
- AC1: 'Reply on RC1', Valeria Di Biagio, 08 Dec 2025
  
  We sincerely thank the Reviewer for the positive feedback and thoughtful perspective on the manuscript.
  
  We address the minor comments in detail below:
  
  Line 145: We thank the reviewer for the suggestion. We will incorporate the recommended expression “(long-term average)” in the first definition of “climatology” (line 136 of the submitted manuscript) to improve clarity.
  
  Lines 180-185: Yes, we meant exactly “(temperature in the range 11°C - 16°C, i.e. 2 °C - 3°C above the climatology)”. We will clarify the text as suggested.
  
  Line 230: Thank you for pointing out this typo. We will add “HR” in the caption of the table.
  
  Citation: https://doi.org/10.5194/sp-2025-9-AC1
RC2:
'Comment on sp-2025-9', Anonymous Referee #2, 24 Nov 2025

Please see review report

Citation: https://doi.org/10.5194/sp-2025-9-RC2
- AC2: 'Reply on RC2', Valeria Di Biagio, 08 Dec 2025
  
  We are grateful to the Reviewer for the careful consideration and evaluation of our manuscript.
  
  We believe that the manuscript will be significantly improved in clarity and effectiveness after incorporating the suggested revisions.
  
  We provide an attached file containing our point-by-point responses, highlighted in blue.
  
  Citation: https://doi.org/10.5194/sp-2025-9-AC2

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) (19 Dec 2025) by Marilaure Grégoire

AR by Valeria Di Biagio on behalf of the Authors (20 Feb 2026) Author's response Author's tracked changes Manuscript

ED: Referee Nomination & Report Request started (08 Mar 2026) by Marilaure Grégoire

RR by Anonymous Referee #2 (27 Mar 2026)

ED: Publish subject to technical corrections (27 Mar 2026) by Marilaure Grégoire

ED: Publish subject to technical corrections (27 Mar 2026) by Marilaure Grégoire (Chief editor)

AR by Valeria Di Biagio on behalf of the Authors (04 Apr 2026) Author's response Manuscript

Short summary

Anomalous eutrophication levels characterised the northern Adriatic Sea in 2024 spring and fall. We analysed the anomaly in marine chlorophyll and primary production by using satellite and models, in connection with multiple events of very intense river discharges, high temperatures and circulation structures. Our study proves the importance of coastal forecasting models to monitor ocean-land dynamics.