BIOGEOCHEMICAL dataset collected during the TONGA cruise
The objective of the TONGA oceanographic expedition was to study the control of productivity and carbon sequestration by micronutrients of shallow hydrothermal origin in the Western Tropical South Pacific (WTSP) Ocean. The 37-day oceanographic survey took place on board the R/V L’Atalante in 2019 between Oct. 31 to Dec. 6 (Nouméa-Nouméa). Over a large area of the WTSP the team acquired numerous results on both the entire water column (up to the sediment) and the atmosphere. Specific task are represented on figure 1: (task 1) to characterize chemically and optically shallow hydrothermal fluids and to compare the source from below (shallow hydrothermal fluids) with the source from above (atmospheric deposition); (task 2) to quantify the dynamical dispersion of the fluids at small and regional scale; (task 3) to investigate the impact of the shallow hydrothermal sources on the biological activity and diversity, and the feedback to the atmosphere via the oceanic emissions of primary and secondary aerosols. (Task 4) to communicate about the campaign (see for example our Tweeter account (https://www.youtube.com/watch?v=UeABf-cVR-k). A long west to east (up to the blue waters of the gyre) transect allowed to characterize the different biogeochemical provinces crossed and a focus in the region of the Lau Basin allowed to investigate the impact of shallow hydrothermal sources. A series of short and long stations allowed to fully characterize the stocks and the fluxes in the different provinces. Short-term (up to 10 days) processes studies have been conducted (drifting moorings and minicosms experiments). Part of these results will feed into important modeling work. A fixed mooring line launched at the end of the campaign and recovered in Nov. 2020 as well as the 7 ARGO floats and 20 drifting buoys that were dropped during the campaign provide a broader temporal context of the acquisitions done during the campaign. An important focus of the campaign was the trace metal characterization of the entire water column. For this, TONGA has been labeled by the international program GEOTRACES (https://www.geotraces.org/). The impact on biological communities of fluids is supported by the international IMBER program (https://imber.info/). The TONGA project is also part of the LEFE program (funding by LEFE-CYBER and LEFE-GMMC), the ANR (Appel à projets génériques) and the Fondation A-MIDeX of the Aix-Marseille Université. Scheme of the different tasks of the TONGA project and cruise Image Reference: https://www.seanoe.org/data/00770/88169/illustrations/illustration-148.gif.
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Date |
2022-09-05
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Date type |
Creation:
Date identifies when the resource was brought into existence
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Date |
2022-09-14
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Revision:
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amended
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Date |
2022-10-26
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Publication:
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Date type |
Publication:
Date identifies when the resource was issued
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Unique resource identifier |
a53ad03f-3838-8383-3831-000000088169 |
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UTF8:
8-bit variable size UCS Transfer Format, based on ISO/IEC 10646
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Supplemental Information |
https://campagnes.flotteoceanographique.fr/campagnes/18000884/ |
Supplemental Information |
http://tonga-project.org/web/ |
Supplemental Information |
https://twitter.com/tongaproject |
Supplemental Information |
http://www.obs-vlfr.fr/proof/php/TONGA/tonga.php |
Hierarchy level |
Dataset:
Information applies to the dataset
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Statement |
Quality controlled data |
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 |
2010-12-08
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Date type |
Publication:
Date identifies when the resource was issued
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Explanation |
See the referenced specification |
Pass |
No |
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Title |
Corrigendum to INSPIRE Metadata Regulation published in the Official Journal of the European Union, L 328, page 83 |
Date |
2010-12-08
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Date type |
Publication:
Date identifies when the resource was issued
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Explanation |
See the referenced specification |
Pass |
No |
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Title |
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 |
2010-12-08
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Date type |
Publication:
Date identifies when the resource was issued
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Explanation |
See the referenced specification |
Pass |
No |
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Access constraints |
Other restrictions:
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Conditions for access and use apply |
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Other restrictions:
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CC-BY 4.0 |
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Protocol |
WWW:LINK-1.0-http--link |
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