EMODnet product catalogue
Improved accuracy and spatial resolution for bio-logging-derived chlorophyll a fluorescence measurements in the Southern Ocean
The ocean’s meso- and submeso-scales (1-100 km, days to weeks) host features like filaments and eddies that have a key structuring effect on phytoplankton distribution, but that due to their ephemeral nature, are challenging to observe. This problem is exacerbated in regions with heavy cloud coverage and/or difficult access like the Southern Ocean, where observations of phytoplankton distribution by satellite are sparse, manned campaigns costly, and automated devices limited by power consumption. Here, we address this issue by considering high-resolution in-situ data from 18 bio-logging devices deployed on southern elephant seals (Mirounga leonina) in the Kerguelen Islands between 2018 and 2020. These devices have submesoscale-resolving capabilities of light profiles due to the high spatio-temporal frequency of the animals’ dives (on average 1.1 +-0.6 km between consecutive dives, up to 60 dives per day), but observations of fluorescence are much coarser due to power constraints. Furthermore, the chlorophyll a concentrations derived from the (uncalibrated) bio-logging devices’ fluorescence sensors lack a common benchmark to properly qualify the data and allow comparisons of observations. By proposing a method based on functional data analysis, we show that a reliable predictor of chlorophyll a concentration can be constructed from light profiles (14 686 in our study) and matchups with satellite ocean-color data, thus enabling effective (1) homogenization then calibration of the bio-logging devices’ fluorescence data and (2) filling of the spatial gaps in coarse-grained fluorescence sampling. The developed method improves the spatial resolution of the chlorophyll a field description from ~30 km to ~12 km. These results open the way to empirical study of the coupling between physical forcing and biological response at submesoscale in the Southern Ocean, especially useful in the context of upcoming high-resolution ocean-circulation satellite missions like SWOT.
Important Note: This submission has been initially submitted to SEA
scieNtific Open data Edition (SEANOE) publication service and received the recorded DOI.
The metadata elements have been further processed (refined) in EMODnet
Ingestion Service in order to conform with the Data Submission Service
specifications.
Simple
- Date (Creation)
- 2023-01-01
- Date (Revision)
- 2023-07-07
- Date (Publication)
- 2025-03-31
- Date (Publication)
- Citation identifier
- a53ad03f-3933-9333-3332-000000093268
- Code
- DOI:10.17882/93268
- Other citation details
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Le Ster Loïc, Claustre Hervé, D'Ovidio Francesco, Nerini David, Picard Baptiste, Guinet Christophe (2023). Improved accuracy and spatial resolution for bio-logging-derived chlorophyll a fluorescence measurements in the Southern Ocean. SEANOE. https://doi.org/10.17882/93268 In addition to properly cite this dataset, it would be appreciated that the following work(s) be cited too, when using this dataset in a publication : Le Ster Loïc, Claustre Hervé, d’Ovidio Francesco, Nerini David, Picard Baptiste, Guinet Christophe (2023). Improved accuracy and spatial resolution for bio-logging-derived chlorophyll a fluorescence measurements in the Southern Ocean. Frontiers in Marine Science, 10. https://doi.org/10.3389/fmars.2023.1122822
- Point of contact
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Organisation name Individual name Electronic mail address Role SEA scieNtific Open data Edition Publisher Ifremer, Scientific Information Systems for the sea Dataset Holding Organisation Ifremer, Scientific Information Systems for the sea Author
- Keywords
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- Access constraints
- Other restrictions
- Other constraints
- no limitations to public access
- Use limitation
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Conditions for access and use apply
- Use constraints
- Other restrictions
- Other constraints
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CC-BY 4.0
- Character set
- UTF8
- Topic category
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- Oceans
- Begin date
- 2018-01-01
- End date
- 2021-12-30
))
- Unique resource identifier
- WGS 1984
Spatial representation info
- Name
- OnLine resource
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Protocol Linkage Name WWW:DOWNLOAD-1.0-http--download
https://cloud.emodnet-ingestion.eu/index.php/s/nN7l7z5CMUE3SZR WWW:LINK-1.0-http--link
- Hierarchy level
- Dataset
Conformance result
- Title
-
COMMISSION REGULATION (EC) No 1205/2008 of 3 December 2008 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards metadata
- Date (Publication)
- 2010-12-08
- Explanation
-
See the referenced specification
- Pass
- No
Conformance result
- Title
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Corrigendum to INSPIRE Metadata Regulation published in the Official Journal of the European Union, L 328, page 83
- Date (Publication)
- 2010-12-08
- Explanation
-
See the referenced specification
- Pass
- No
Conformance result
- Title
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Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services
- Date (Publication)
- 2010-12-08
- Explanation
-
See the referenced specification
- Pass
- No
Metadata
- File identifier
- a53ad03f-3933-9333-3332-000000093268 XML
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Dataset
- Date stamp
- 2025-05-07T00:00:00
- Metadata standard name
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ISO 19115:2003/19139
- Metadata standard version
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1.0
- Metadata author
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Organisation name Individual name Electronic mail address Role Laboratory of Oceanography of Villefranche Point of contact
)))
