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Oceanic Research Cruise Dates & Strategy Evolution Options

Explore the almost official cruise expedition from October 21 to December 13, with various legs and possible strategy evolutions setting sail from Tahiti, engaging in research at Easter Island, Concepcion, and more. Plan for detailed measurements, stations, and data collection processes.

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Oceanic Research Cruise Dates & Strategy Evolution Options

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  1. Cruise dates « almost official » : October 21- December 13 • 54 days • LEG 1 : 29 jours • LEG 1 : 25 jours • 48 hour stop at Easter Island

  2. 164°W 132°W 100°W 68°W 4°N 20°S 44°S Possible evolutions regarding initial strategy Tahiti Easter Island Concepcion

  3. 2 2 2 2 2 2 6 6 6 6 6 6 6 6 OPTION 1 Tahiti Easter Island Concepcion

  4. 2 2 2 2 2 2 2 6 6 6 6 6 6 6 1 6 Tahiti Easter Island 6 Concepcion 6 OPTION 2

  5. 2 2 2 2 2 2 2 2 6 6 6 6 6 6 6 6 1 6 Tahiti Easter Island 4 Concepcion 6 OPTION 3

  6. 2 2 2 2 2 2 2 2 6 6 6 6 6 6 6 6 Tahiti Easter Island 4 Concepcion 6 OPTION 4

  7. Alternative scenarii for the cruise OPTION 1 basic OPTION 2 + ref HLN Marq. OPTION 3 + gradient towards UPW OPTION 4 + mesotrophic station in grad. 28 10 6 10 30 8 6 10 26 12 8 8 22 16 8 8 OLIGO MESO (+ HLNC) EUTRO Transit. 54 54 54 54

  8. Three types of stations • Short stations :7 hours 30 • Long stations : 2 days • Long stations : 4-6 days Transit time calculated at 11 knots

  9. Short stations Three main temporal constraints : • Stations no longer than 7.5 hours • Sampling for simulated production before sunrise • Overpasses of satellites in the 9h00-15h00 time window • calval +/- 1 Hour of the passage • MERIS : 9h00 –11h00 • MODIS T: 9h00 –11h00 • SeaWiFS : 11h00-13h00 • MODIS A: 13h00-15h00

  10. 2 Day-stations Context / constraints : • Locations will be choosen on the basis of high resolution color scenes (and SST for upwelling?) • a priori, distance between stations equals 55-70 miles (5-7 hour transit). Need to be on the following station on time (3-4 am) for primary production sampling • Eventually perfom a deep station • CTD-rosette-PVM-IOP every 3 hours

  11. 5 Day-stations Context / constraints : • CTD-rosette-PVM-IOP every 3 hours • Eventually perfom a deep station

  12. Deep stations Measurements : • TCO2, O2, N20, • Iron • nutrients • Other trace elements (?) • DOM • diversity • irradiation MO profonde Where and how deep?

  13. Detritus and surface microlayer specific sampling? At convergence, misinterpretation of the signal in terms of [Chla] because of the presence of floating detritus

  14. Mooring • sediment trap : drifting mooring with 2 PPS5 5?) ; sample (mass) budget ; 150 m and 300 m • production line : brought by Thierry? Argo floats / drifters • 10 drifters with drogue (NOAA) (20 m3 ) • 23 ARGO floats (SCRIPPS) (10 m3, stockage à l’abris) • sent to Tahiti : Claudie will be taught and made in charge of deployment. • 2 floats + radiometers (Marlon?) Tramp deployment • station gyre (5 days) Moorings / argo floats / tramps

  15. Continuous underway measurements • Temperature, Salinity • fluo Turner • Hiac • Transmissometer Cstar 488 nm – 660 nm • pCO2, N2O • (flow cytometry, 1 hour) • other measurements ???

  16. Deck incubation • Who? • temperature controled? • Alternative solution to get Ze « at night » and to chose the accurate sampling depths (require to calibrate the Seatech fluorometer with “extracted turner Chla” and operate a small program just after the dowcast. Operational after 2-3 days (sufficient data points for the calibration of the turner).

  17. Radioisotopes – produits chimiques • container : (France, Thierry, Peggy, Marcel) • compteur à scintillation • demande CIREA – personnes compétentes • contraintes sur les produits chimiques? • Fiches produits

  18. Rosette – bottles - sensors • CTD INSU modifiée + O2 + CSTAR (660) + Fluo CDOM +AC9 + bb3 • batterie + capteur NO3 (Marlon) • batterie + AC9 (dissous) + CSTAR (488) + SAM + ECO VSF • PVM monotube • place pour 19 ou 21 bouteilles sur la rosette • 42 bouteilles INSU (21 classiques, 21 extérieures): quel choix? • tests et assemblage de la rosette et des capteurs en Mars-Avril à Villefranche

  19. Data - base

  20. Role of the PROOF data base • To list, collect, organize and archive data originated from PROOF operations • To permit the exchange of data between national and international institutions • Transfer the validated data to international data bases (PANGAEA) • To diffuse scientific information within the PROOF program (Announcements, Colloquium, Proposals …) • http://www.obs-vlfr.fr/proof/index_vt.htm

  21. PROOF Data Base M.P. Labaied Chief of mission orcruise data person in charge Parameter manager Researchers which make the data acquisition

  22. Step 1 - Before the cruise (June) Chief of mission Listing of all the planned parameters

  23. Step 1 - Before the cruise (June) Responsibles of parameters Precise description of the parameters

  24. Step 2 - Before the end of each leg Managers of Parameters • Give a first indication on what has been measured during the leg? • number of stations • number of samples • continuous • etc

  25. Step 3 - After the cruise Manager of Parameters Complete the Parameter form

  26. Step 4 – Before your retirement ! Chief of Mission Managers of parameters • Transmit your data files to the Proof Data Base • Marie-Paule Labaied • Indicate the data validation level • Indicate the confidentiality (2 years)

  27. Embarquants : qui échantillonne pour les non-embarquants? Collaborations? • phyto (Gomez) Antoine/ Hervé • coccolithophoridés (Beaufort / de Varga) Frédéric • ciliés (Dolan) Frédéric • pigments photoheterotrophes (Bidigare) Joséphine • flow cytometry : bacteria chla (Bidigare) Frédéric • virus (Markus) ? • Nif gene (Zehr) Frédéric • Oxygène ? • P pools (Karl) Thierry? • FRRF IR (Kolber Falkowski?) ? • Molecular CDOM (Repeta) Hervé / Davy • ?? • ??

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