MINERVE 04-05 (R0,R2,R4)
| Type | Added value transit |
|---|---|
| Set | This cruise is part of the set MINERVE |
| Ship | L'Astrolabe |
| Ship owner | IPEV |
| Dates | 20/10/2004 - 04/03/2005 |
| Chief scientist(s) | SCHAUER Bernard, SULTAN Emmanuelle , GOYET Catherine |
LABORATOIRE D'OCÉANOGRAPHIE ET DU CLIMAT : EXPÉRIMENTATIONS ET APPROCHES NUMÉRIQUES - UMR 7159 Institut Pierre Simon Laplace Boîte 100 4 place Jussieu 75005 Paris +33 (1) 44 27 32 48 |
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| DOI | 10.17600/4210030 |
| Objective | The main objective of the MINERVE cruises taking advantage of transit (PROOF program (Flamenco2)) was to observe and measure spatial-temporal variations of pCO2 at the surface with respect to related parameters (Chlorophyll, temperature, salinity, TCO2, AT and 13C). Studies to model monthly variations in pCO2 either locally or on the scale of the Indian basin having showed that the simulated pCO2 fields were highly sensitive to the surface and subsurface boundary conditions, the second high priority objective was to obtain repeat sections of total dissolved inorganic carbon (TCO2) and Total Alkalinity (TA) in surface water with very tightly meshed and highly accurate data. Determination of the ocean mixed layer and the position of oceanic fronts were obtained using measurements taken in the framework of the SURVOSTRAL program using XBT probes and a thermosalinometer. We took semi-continuous measurements of total dissolved inorganic carbon (TCO2) and Total Alkalinity (TA) in surface using a technique we developed at the LBCM (marine biogeochemistry and chemistry laboratory) as well as pCO2 and surface water temperature and air pCO2 measurements. Automated continuous and semi-continuous measurement systems for pCO2 and AT+TCO2 were used (calibrated every 6 hours for pCO2 and daily for AT+TCO2). Measurements were acquired and data pre-processed on board. Filters were recovered every 4 hours to measure chlorophyll and nutrients in the laboratory. These measurements were conducted by the Australians at CSIRO and the Australian Antarctic Division of Hobart at the return of each of the l'Astrolabe vessel's rotations. Surface water samples were taken to measure carbon's stable isotopes and bioptic sensors were set up by CSIRO on the pumping circuit for continuous chlorophyll measurements. |
