Estimating the lateral transfer of organic carbon through the European river network using a land surface model

Zhang, Haicheng; Lauerwald, Ronny; Regnier, Pierre; Ciais, Philippe; Van Oost, Kristof; Naipal, Victoria; Guenet, Bertrand; Yuan, Wenping

doi:https://doi.org/10.5194/esd-13-1119-2022

Articles | Volume 13, issue 3

https://doi.org/10.5194/esd-13-1119-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/esd-13-1119-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 13, issue 3

Research article

|

29 Jul 2022

Research article |

| 29 Jul 2022

Estimating the lateral transfer of organic carbon through the European river network using a land surface model

Haicheng Zhang, Ronny Lauerwald, Pierre Regnier, Philippe Ciais, Kristof Van Oost, Victoria Naipal, Bertrand Guenet, and Wenping Yuan

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Final revised paper (published on 29 Jul 2022)
Supplement to the final revised paper
Preprint (discussion started on 01 Feb 2022)
Supplement to the preprint

Interactive discussion

Status: closed

RC1:
'Comment on esd-2022-4', Anonymous Referee #1, 21 Feb 2022

For the review, please refer to the attached pdf.

Citation: https://doi.org/10.5194/esd-2022-4-RC1
- AC1: 'Reply on RC1', Haicheng Zhang, 21 Apr 2022
  
  Thanks a lot for your positive comments, as well as your specific suggestions and corrections below. Your comments are very helpful to improve our manuscript. We have carefully studied them and revised our manuscript accordingly. Please see our detailed responses to your comments in the attached PDF file.
  
  Citation: https://doi.org/10.5194/esd-2022-4-AC1
RC2:
'Comment on esd-2022-4', Thomas Hoffmann, 09 Mar 2022

see attached file

Citation: https://doi.org/10.5194/esd-2022-4-RC2
- AC2: 'Reply on RC2', Haicheng Zhang, 21 Apr 2022
  
  Dear reviewer,
  Thanks a lot for your positive comments, as well as your specific suggestions and corrections below. Your comments are very helpful to improve our manuscript. We have carefully studied them and revised our manuscript accordingly. Please see our detailed responses to your comments in the attached PDF file.
  Best regards!
  Haicheng Zhang, on behalf of all authors
  
  Citation: https://doi.org/10.5194/esd-2022-4-AC2
RC3:
'Comment on esd-2022-4', Fanny Langerwisch, 16 Mar 2022

The comment was uploaded in the form of a supplement: https://esd.copernicus.org/preprints/esd-2022-4/esd-2022-4-RC3-supplement.pdf

Citation: https://doi.org/10.5194/esd-2022-4-RC3
- AC3: 'Reply on RC3', Haicheng Zhang, 21 Apr 2022
  
  Dear reviewer,
  Thanks a lot for your positive comments, as well as your specific suggestions and corrections below. Your comments are very helpful to improve our manuscript. We have carefully studied them and revised our manuscript accordingly. Please see our detailed responses to your comments in the attached PDF file.
  Best regards!
  Haicheng Zhang, on behalf of all authors
  
  Citation: https://doi.org/10.5194/esd-2022-4-AC3

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision | EF: Editorial file upload

ED: Publish subject to technical corrections (02 May 2022) by Christian Reick

ED: Reconsider after major revisions (02 May 2022) by Christian Reick

AR by Haicheng Zhang on behalf of the Authors (05 May 2022) Author's response Author's tracked changes Manuscript

ED: Referee Nomination & Report Request started (09 May 2022) by Christian Reick

RR by Anonymous Referee #1 (25 May 2022)

RR by Thomas Hoffmann (07 Jun 2022)

Suggestions for revision or reasons for rejection

Comment on the revised manuscript: “Estimating the lateral transfer of organic carbon through the European river 1 network using a land surface model”

The manuscript greatly improved through the revision. From my point of view, the manuscript can be published with minor revisions.

Line 161ff: in this line you use the terminology of labile and stable DOC pools. In the following text you talk about free and absorbed DOC. Later (line 222) you use the term “refractory”. Please use same terminology here.
Line 182ff: “The adsorption, desorption, production, consumption and 184 transport of DOC within the soil column, as well as DOC export from soil to river along with surface runoff and drainage in ORCHILEAK is simulated using the same method as ORCHIDEE-SOM”  Does this mean that the processes in soil are the same as in river channel? This is confusing!
Line 352: TC as defined below, is not the maximum load but maximum suspended sediment concentration. Furthermore, rephrase the sentence along the following line: First TC is maximum concentration. Second, if erosion or deposition occurs will depend on the actual concentration with respect to TC.
Line 385: please highlight that TC is expressed as suspended sediment concentration
Line 386ff: What is the difference between daily stream flow rate and daily downstream water discharge?
Line 605ff: Indicate why you use WATEM / SEDEM results to compare sediment delivery rates from your model.
Line 613: ‘sediment discharge rates’  use same terminology as above (e.g. sediment delivery) and highlight that you compared with observed measurements here!
Line 644ff: Please shortly describe why the differences between the DBs occur.
Line 688ff: POC is a function of discharge in many river systems and in the Rhine river (see for instance Hoffmann et al 2020). It would be interesting to see rating plots of POC~discharge for measured and modelled systems. This will highlight importance differences for various flow regimes (e.g. low flow / high flow).
Line 708: Bare rock and ice are not per se indicative of low erosion rates. Typically, bare rock is observed in mountainous regions, which are characterized by high erosion rates. Ice, if associated with glaciers, is also indicative of increased rates. Please rephrase!
Line 720: The Danube suspended sediment yields strongly declines due to the construction of dams, with are considered as the major sediment sinks along the Danube. If you mention the Danube in the context of sediment deposition, you should indicate the importance of dams. Please refer to Habersack et al (2016, Science of the Total Env) in this context.

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RR by Fanny Langerwisch (16 Jun 2022)

ED: Publish subject to minor revisions (review by editor) (20 Jun 2022) by Christian Reick

AR by Haicheng Zhang on behalf of the Authors (30 Jun 2022) Author's response Author's tracked changes Manuscript

ED: Publish as is (11 Jul 2022) by Christian Reick

AR by Haicheng Zhang on behalf of the Authors (12 Jul 2022)

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Short summary

We present a land surface model which can simulate the complete lateral transfer of sediment and carbon from land to ocean through rivers. Our model captures the water, sediment, and organic carbon discharges in European rivers well. Application of our model in Europe indicates that lateral carbon transfer can strongly change regional land carbon budgets by affecting organic carbon distribution and soil moisture.