Lagoon bathymetry of Gambier Islands, French Polynesia
The Gambier lagoon has a diamond-shaped form and surrounds seven high islands that are very exposed to the ocean. It is bordered by a barrier reef, which is submerged along the southern and western sides and by an intertidal to emerged barrier reef along the northern and eastern sides. The northern side is cut in some sections by several hoa, (shallow passages) allowing connections between the lagoon and the open ocean. The average depth of the domain is 25 m, with a maximum depth of 80 m along the southeastern coast of Mangareva Island. The bathymetry is complex, forming several basins, including the Rikitea enclosed lagoon, which is bordered by Mangareva and Aukena islands.
The bathymetry of the Gambier Islands lagoon was generated using three data sources: SHOM soundings acquired in the 1960s, multi-beam data from Geopolynesie (5 m resolution) collected between 2020 and 2021, and satellite-derived bathymetry (SDB) at 10 m resolution using Sentinel-2 imagery to fill depth gaps in shallow areas. The final bathymetric grid was produced for implementation in the numerical hydrodynamic model MARS3D at a resolution of 100 m, using the compiled sounding datasets described above. The interpolation process included a Hanning low-pass filter applied five consecutive times for depths below 50 m, followed by an additional low-pass filter (ROMS) with a factor of 0.25.
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Citation proposal
BRUYERE Oriane (IRD, UMR ENTROPIE, New Caledonia) - TROPHIME Thomas (Direction des Ressources Marines, French Polynesia) - ANDREFOUET Serge (IRD, UMR ENTROPIE, French Polynesia) (2025) . Lagoon bathymetry of Gambier Islands, French Polynesia. https://services.mspdata.eu:/geonetwork/srv/api/records/seanoe:109411 |
Simple
- Date ( Publication )
- 2025-10-21
- Date ( Revision )
- 2025-11-14
- Other citation details
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Bruyere Oriane, Trophime Thomas, Andrefouet Serge (2025). Lagoon bathymetry of Gambier Islands, French Polynesia. SEANOE. https://doi.org/10.17882/1094 11
Publisher
- Keywords ( Theme )
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Bathymetry
,hydrodynamic
,MARS3D
,SDB
,SMF
,Gambier
,French Polynesia
,Physical oceanography
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- ODATIS aggregation parameters and Essential Variable names ( Theme )
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- Bathymetry
- SeaDataNet Parameter Disciplines ( parameter )
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- Physical oceanography
- Type de jeux de donnée ODATIS ( Theme )
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- Aggregate data
- Use constraints
- Other restrictions
- Other constraints
- Date ( Publication )
- 2024
Publisher
Author
Author
Author
Author
- Association Type
- Cross reference
- Initiative Type
- Study
- Date ( Publication )
- 2023
Publisher
Author
Author
Author
Author
Author
- Association Type
- Cross reference
- Initiative Type
- Study
- Metadata language
- English
- Topic category
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- Oceans
- Distribution format
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NC, NETCDF
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ASC
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- OnLine resource
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Processed data
Gambier_lagoon_bathymetry_100m_res [RESTRICTED] - 510 KB
- OnLine resource
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Processed data
Gambier_lagoon_bathymetry_100m_res_table [RESTRICTED] - 5 MB
- OnLine resource
- DOI of the product
- OnLine resource
- Seanoe
- Hierarchy level
- Dataset
- Statement
Metadata
- File identifier
- seanoe:109411 XML
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Dataset
- Date stamp
- 2025-11-14
- Metadata standard name
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ISO 19115:2003/19139
- Metadata standard version
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1.0
Metadata catalogue