Oceanographic dataset collected during the 2021 scientific expedition of the Canadian Coast  Guard Ship <i>Amundsen</i>

Ratsimbazafy, Tahiana; Dezutter, Thibaud; Desmarais, Amélie; Amirault, Daniel; Guillot, Pascal; Morisset, Simon

doi:https://doi.org/10.5194/essd-16-471-2024

Articles | Volume 16, issue 1

https://doi.org/10.5194/essd-16-471-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/essd-16-471-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 16, issue 1

Data description paper

|

19 Jan 2024

Data description paper |

| 19 Jan 2024

Oceanographic dataset collected during the 2021 scientific expedition of the Canadian Coast Guard Ship Amundsen

Tahiana Ratsimbazafy, Thibaud Dezutter, Amélie Desmarais, Daniel Amirault, Pascal Guillot, and Simon Morisset

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Final revised paper (published on 19 Jan 2024)
Preprint (discussion started on 15 Aug 2023)
Supplement to the preprint

Interactive discussion

Status: closed

RC1:
'Comment on essd-2023-204', Anonymous Referee #1, 12 Sep 2023

Please find attached my comments

Citation: https://doi.org/10.5194/essd-2023-204-RC1
- AC2: 'Reply on RC1', Tahiana Ratsimbazafy, 29 Sep 2023
  
  - Lines 26-28: Please add some details and reference about the referred unique ecosystems of the Arctic Ocean.
  
  We did not add details, the main point are already in the sentence. Adding information would be outside of the scope of the paper.
  
  - Lines 32-35: Reference is made to more than 1400 refereed scientific publications and 400 datasets resulting from CCGS Amundsen expeditions since 2003. Are these also publicly available on an annual basis? If yes, please add at least the most recent ones to the reference list or add a reference to where this information can be found.
  
  Datasets resulting from the central pool of scientific instruments onboard the Canadian Coast Guard Ship Amundsen since 2003 are available for public access at the Polar Data Catalogue (https://www.polardata.ca/ ) and other websites; for instance the bathymetry data are accessible at http://www.omg.unb.ca/arctic-mapping/ ; https://www.ncei.noaa.gov/maps/bathymetry/ ;
  
  The Amundsen Science website includes an overview of all the available data at the Polar Data Catalogue (https://amundsenscience.com/data/data-access/).
  
  We keep track of the scientific publications resulting from the CCGS Amundsen expeditions for reporting and internal purposes only. While we do not have a list of publications publicly available, we referred a few recent publications at line 32-35. The publications range from physical oceanography to geology, biogeochemistry, ecology and safety hazard assessments.
  
  - Lines 41-42: Please add labels for Labrador Sea, the Baffin Bay, the Canadian Arctic Archipelago, and the Beaufort Sea in Figure 1. Also consider adding the main circulation features as detailed in Section 1.1, distinguishing between cold and warm waters.
  
  Main circulations and labels will be added in Figure 1 as suggested.
  
  - Line 144: Please add reference to the Winkler method.
  
  The following reference will be added.
  
  Aminot, A., & Chaussepied, M. (1983). Manuel des analyses chimiques en milieu marin. Editions Jouve, CNEXO, Paris, 395 p.
  
  - Line 151: Please add reference to the Seabird website or to the Seabird data processing software.
  
  The following reference will be added.
  
  Sea-Bird Electronics, Inc. (n.d): http://seabird.com/software/sbe-data-processing
  
  - Section 2.2: Were collocated data from the CTD-Rosette and in-situ samples used for inter-comparison and correction of the Moving Vessel Profiler data, where available?
  
  Collocated data from the CTD Rosette were available and used for inter-comparison and correction of the MVP Profiler data. In-situ samples were used to validate data from the CTD-Rosette. More details of the processings are available in the report processing (available with the data).
  
  - Line 254: If TS Diagram represented in Figure 5 are derived by transect profiles during leg 3 of 2021 expedition, it is not clear what is derived from Curry et al. (2011); Tang et al. (2004) in Fig. 5.
  
  The sentence in Line 254 was reformulated as follow:
  
  The distinction between the different water masses observed in Fig. 5 has been made according to Curry et al. (2011); Tang et al. (2004).
  
  - Line 290: When you report: “Such dataset can be compare to the ones collected by the Amundsen during the 2021 expedition”, Do you mean that the 2 datasets are comparable or that you are going to compare them in a future works? If you intended the former, please rephrase and show results or comments on this.
  
  Line 297-290 now reads:
  
  The Amundsen has been sampling in the Cape Bathurst area 12 times since 2003, which produces an extensive dataset that could be used by readers to assess interannual variability and trend in the region. Recently, Massicotte et al. (2021) have compiled and standardized the collected datasets from the 2009 MALINA expedition in the Beaufort Sea in order facilitate their reuses.
  
  - Line 295: “Only the first 148 casts are presented in this paper”. Please explain.
  
  After the 148th dive of the MVP, the ship has changed its heading to enter Diana Bay towards Quaqtaq. In order to make sense of the transect, only profiles acquired in a straight line (while crossing Hudson Strait) are presented in the paper and in figure.
  
  Citation: https://doi.org/10.5194/essd-2023-204-AC2
RC2:
'Comment on essd-2023-204', Paola Picco, 12 Sep 2023

The authors present a precious and relevant data-set from meteo-oceanographic, bathymetric and seabed measurements collected during a long campaign in the Canadian Arctic region in 2021.The data-set is clearly described and commented and the paper is well written and properly organised. That’s why I strongly recommend the publication on ESSD
Some minor suggestions/technical correction:
Fig.4 6 9 10 I doubt that temperature isolines reported in salinity maps and salinity isolines in temperature maps can help for a better data interpretation. I would suggest to use the same isolines of the displayed parameters or to better explain this in the figure captions.
2.1 What is the depth of TSG intake?
2.2 Which was the maximum vessel speed to operate the MVP ?
In Fig 10 Use the same units of the others figures for DO. Also report the temperature map. Are space and time scale consistent with the presence of internal waves?
LADCP is mentioned (line 137) but nothing is shown or commented. Why ?

Citation: https://doi.org/10.5194/essd-2023-204-RC2
- AC1: 'Reply on RC2', Tahiana Ratsimbazafy, 21 Sep 2023
  
  - Fig.4 6 9 10 I doubt that temperature isolines reported in salinity maps and salinity isolines in temperature maps can help for a better data interpretation. I would suggest to use the same isolines of the displayed parameters or to better explain this in the figure captions.
  We have added isolines from different variables other than the ones displayed on the figures to maximize the information presented for better interpretation. Actually it does not, so we decided to follow your recommendation on using isolines from the displayed variable. It appears to help the reading of the figure to be more convenient.
  - 2.1 What is the depth of TSG intake?
  The depth of TSG intake is 7 m.
  - 2.2 Which was the maximum vessel speed to operate the MVP ?
  The maximum vessel speed: 8 knots
  - In Fig 10 Use the same units of the others figures for DO. Also report the temperature map. Are space and time scale consistent with the presence of internal waves?
  The unit of the DO on the Fig10 are now converted into microMolar.
  We believe they are not related to the presence of internal wave at all. They seems to be generated by the repetitive free fall motion of the MVP fish along the transect. However, it is still premature to draw conclusions on the nature of the real phenomenon behind such structures. We did not comment on them to avoid interpretations of the data in order to meet a Data Paper content expectations. In this transect, the distances between each MVP free fall is mainly about 500m, sometime can reach 1km depending on depth of the water along the transect.
  - LADCP is mentioned (line 137) but nothing is shown or commented. Why ?
  They are only meant to be an example of what kind of instruments are installed on the Rosette the same way as the other instruments presented on the Table 1 such as the Deep Suna (Nitrate sensor). The paper focuses mainly on the 2021 data expedition. However, LADCP data since 2010 are available freely for public access at Polar Data Catalogue under CCIN 12714 or directly with this link: https://www.polardata.ca/pdcsearch/PDCSearchDOI.jsp?doi_id=12714
  
  Citation: https://doi.org/10.5194/essd-2023-204-AC1

Peer review completion

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

AR by Tahiana Ratsimbazafy on behalf of the Authors (28 Oct 2023) Author's response Author's tracked changes Manuscript

ED: Publish subject to technical corrections (02 Nov 2023) by Alberto Ribotti

AR by Tahiana Ratsimbazafy on behalf of the Authors (08 Nov 2023) Author's response Manuscript

Short summary

The Canadian Coast Guard Ship has collected oceanographic data across the Canadian Arctic annually since 2003. Such activity aims to support Canadian and international researchers. The ship has several instruments with cutting-edge technology available for research each year during the summer. The data presented here include measurements of physical, chemical and biological variables during the year 2021. Datasets collected from each expedition are available free of charge for the public.