Global certified-reference-material- or reference-material-scaled nutrient gridded dataset GND13

Aoyama, Michio

doi:https://doi.org/10.5194/essd-12-487-2020

Articles | Volume 12, issue 1

https://doi.org/10.5194/essd-12-487-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/essd-12-487-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 12, issue 1

Data description paper

|

28 Feb 2020

Data description paper |

| 28 Feb 2020

Global certified-reference-material- or reference-material-scaled nutrient gridded dataset GND13

Michio Aoyama

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Final revised paper (published on 28 Feb 2020)
Supplement to the final revised paper
Preprint (discussion started on 21 Aug 2019)
Supplement to the preprint

Interactive discussion

Status: closed

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

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- Supplement

SC1: 'World Ocean Atlas 2009 Citations', Hernan Garcia, 23 Aug 2019
- AC1: 'citations of WOA2009', Michio Aoyama, 24 Aug 2019
RC1: 'Review', Anonymous Referee #1, 05 Sep 2019
- AC2: 'Reply to anonymous referee #1', Michio Aoyama, 04 Dec 2019
RC2: 'Review of Global CRM/RM-scaled nutrient gridded dataset GND13', Chris Langdon, 06 Nov 2019
- AC3: 'Reply to Referee #2, Dr. Chris Langdon', Michio Aoyama, 04 Dec 2019

Peer-review completion

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

AR by Michio Aoyama (deceased) on behalf of the Authors (04 Dec 2019) Author's response Manuscript

ED: Referee Nomination & Report Request started (08 Jan 2020) by David Carlson

RR by Anonymous Referee #1 (21 Jan 2020)

Suggestions for revision or reasons for rejection

(Previously referee #1)

The author and the other reviewers have addressed my main concerns with this manuscript, and I believe it is ready for publication after some language edits.

Upon reading the response to reviewers, referee #2’s comments, and thinking some more, I now agree that this data product will be of wide use. Even if many people do use GLODAPv2 instead of this data product, this paper still makes an important comment about traceability. Moreover, the added comparisons to GLODAPv2 will help the readers put into context how different this data product is and understand how much GLODAPv2 has to gain through a deeper consideration of traceability.

Specific suggestions and confusions:
P1L15: “used as a reference”
P1L16: “…by other cruises SI traceable.” “data was an additional”
P1L17: “Dissolved oxygen was secondarily-quality controlled using the same methodology as was used to create the nutrients gridded data product, but, lacking a traceable standard, the resulting oxygen data product is not SI traceable.”
P1L19: “as a SI”
P2L18: “after a CRM for nutrients”
P3L5: Consider putting the 2nd paragraph at the end of the first.
P3L10: “correction factors for silicate”
P4L6: “oxygen concentrations”
P4L7: “world have some”
P4L9 “and an unbroken”
P4L16: “data, specifically the unbroken chain of comparison, which”
P4L17: “cruises identified in section 2. As noted, this does not mean the oxygen product is SI traceable.”
P5L6: “an accurate baseline of”
P5L7: “set to 1.00, indicating no adjustment is applied, because...”
P5L9: ”aimed at being consistent with the data obtained”
P5L17: “through an inter-laboratory” or through inter-laboratory comparison studies”
P5L18: “2010), these two”
P6L12: “cover the regions not covered by category 1 and 2 cruises, categories” Southern Hemisphere should be capitalized.
P6L16: “3 times the standard” … were these calculated for each cruise? If so, indicate.
P6L17: “data. Questionable”
P6L18: “and creation of the global gridded data product.”
P6L21: “243 cruise crossover points”
P6L22 through P7L2: I don’t understand this text and it sounds important.
P7L2: “As an example, Figure 5 shows the locations of the subset of P03 and P14 stations used for a crossover comparison for a crossover at…(Include East/West for longitude). This crossover is assigned the designation CR081E, and there were two category…”
P7L10: “on the 30”
P8L5: Words are missing here… maybe “because there was a smaller”
P8L10: “nutrient concentrations”
P8L12: “measurements with a 250-km radius becomes very small. When in-house standards were used, station-… may contribute meaningfully”
P8L15: CV is defined twice. It should probably be “the CV” in most places.
P8L20: “concentrations was similar”
P9L4: “oxygen and comparability was kept only with potassium iodate solutions.”
P9L6: “nutrient concentrations”
P9L8: “category 1 cruises, as”
P9L10: “250-km radius (based on the data…crossover points)”
P9L15: “uncertainty from both measurement”
P9L17: “When we apply the method adopted in this study, we need to consider uncertainties of measurements”
P10L3: What is meant by “with uncertainty” ?
P10L19: “of 50”
P11Step1: “First, nutrient and oxygen profiles were interpolated vertically to 136 levels.”
P11L8: “deg. E. Then the griddeddata surface function of the… GMT was used to map these interpolated data horizontally for each of the 136 layers.” These two steps both need to be rephrased.
Table 4: "Dissolved oxygen
Figure 5: What are the other squares at the top of the figure? What are the Lat/Lon units (degrees N/S, E/W)
Figure 6: use ½ as many axis labels for the lower left panel.

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ED: Publish subject to minor revisions (review by editor) (22 Jan 2020) by David Carlson

AR by Michio Aoyama (deceased) on behalf of the Authors (23 Jan 2020) Author's response Manuscript

ED: Publish as is (30 Jan 2020) by David Carlson

AR by Michio Aoyama (deceased) on behalf of the Authors (30 Jan 2020)

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Short summary

A global nutrient gridded dataset that might be the basis for studies of more accurate spatial distributions of nutrients and their changes in the global ocean was created. This is an SI-traceable dataset of nitrate, phosphate, and silicate concentrations based on certified reference materials or reference materials (CRMs/RMs) of seawater nutrient concentration measurements used during many cruises by the author.