A practical approach to lake water density from electrical conductivity and
temperature

Moreira, Santiago; Schultze, Martin; Rahn, Karsten; Boehrer, Bertram

doi:https://doi.org/10.5194/hess-20-2975-2016

Articles | Volume 20, issue 7

https://doi.org/10.5194/hess-20-2975-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/hess-20-2975-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 20, issue 7

Research article

|

22 Jul 2016

Research article |

| 22 Jul 2016

A practical approach to lake water density from electrical conductivity and temperature

Santiago Moreira, Martin Schultze, Karsten Rahn, and Bertram Boehrer

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Final revised paper (published on 22 Jul 2016)
Preprint (discussion started on 17 Feb 2016)

Interactive discussion

Status: closed

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

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- Supplement

SC1: 'Revision of paper', Marco Pilotti, 15 Mar 2016
- RC1: 'Revision of paper', Anonymous Referee #1, 16 Mar 2016
- AC1: 'Response to Reviewer1's comments (RC1 and SC1) about the paper: "A practical approach to lake water density from electrical conductivity and temperature"', Santiago Moreira Martinez, 15 Apr 2016
RC2: 'Referees Comments', Anonymous Referee #2, 18 Mar 2016
- AC2: 'Response to Reviewer2's comments (RC2) about the paper: “A practical approach to lake water density from electrical conductivity and temperature”', Santiago Moreira Martinez, 15 Apr 2016
RC3: 'review', Anonymous Referee #3, 22 Mar 2016
- AC3: 'Response to Reviewer3's comments (RC3) about the paper: "A practical approach to lake water density from electrical conductivity and temperature"', Santiago Moreira Martinez, 15 Apr 2016

Peer-review completion

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

ED: Publish subject to minor revisions (Editor review) (26 May 2016) by Matthew Hipsey

AR by Santiago Moreira Martinez on behalf of the Authors (03 Jun 2016) Author's response Manuscript

ED: Publish subject to technical corrections (20 Jun 2016) by Matthew Hipsey

Dear Authors, thank you for your revisions, I am satisfied the reviewer comments have been addressed and your paper is suitable for publication. I have done one read through and found the following technical/grammatical corrections for you to consider prior to uploading your final version for publication. I look forward to seeing your improved approach used into the future.
Best wishes
Matt

Last sentence of abstract: I recommend changing to “A web link … is provided”.

Page 2 Line 7 : I don’t think that Global Climate Change needs to have capital letters

Page 3 – Para 4 : Can this para be combined with the previous (they are both about RHOMV?)

Page 3: Line ”In conclusion, we see the necessity of including the chemical composition to provide a reasonably accurate density formula."
Re word as – These prior studies therefore highlight the necessity to include the chemical composition to obtain an accurate calculation of density

Page 4 Line 3: add “general” in front of applicability

Page 4 Last line: “complemented by the Eq. (2) and Eq. (3), will be referenced as RHO_LAMBDA approach”
Remove “the” from in front of Eq 2 and add “the” in front of RHO_LAMBDA

Page 5 , line 6 : make sure the web-link to PHREEQC is cited correctly (in ref list instead of in text?)

Page 5; Line 12 : change colon to semi-colon

Page 5, Line 17 : The list is not prefaced with some context. Can you make an leading statement before going into the list?

Page 9 – correct spelling of “spacial" to spatial

Page 10 – I would prefer the heading to be reworded as “conclusions”. The use of comments is not standard and no recommendations (for further research) are given.

Page 11. “The inclusion of such a simple and rather accurate approach for potential density in numerical lake models would be desirable ”
Change to The inclusion of this simple and more accurate approach for potential density calculation in numerical lake models is therefore recommended.”

Page 12: Appendix “A” is presented but only “Appendix” is cited in the text of Section 3 – add the “A”

Figure 1 – ideally sub-plot panels would have sub-plot identifiers (“a”, “b” etc)

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AR by Santiago Moreira Martinez on behalf of the Authors (28 Jun 2016) Manuscript

Short summary

Density calculations in lakes are essential in the study of stability, stratification and numerical modelling. However, density equations which use fixed constant coefficients are still common in use, despite their limitations. We present a practical approach which can specifically include the effect of dissolved substances by fitting two coefficients. The method has been tested against density equations and density measurements in lakes.