Update on Mediterranean SWOT CalVal operationsdoglioli/FineMed/FineMed_summary.pdf · - SWOT fast...
Transcript of Update on Mediterranean SWOT CalVal operationsdoglioli/FineMed/FineMed_summary.pdf · - SWOT fast...
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- Reporting on the FineMed workshop meeting (26-28 June 2017)
- Updating on the Mediterranean cruises
- Plans for 2021 SWOT CalVal: “Adopt a cross-over” global initiative (fast sampling phase)
SWOT CalVal meeting, Toulouse, 29/6/2017
Update on Mediterranean SWOT CalVal operationsFrancesco d’Ovidio CNRS, LOCEAN-IPSL, Paris
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The Mediterranean and the SWOT mission
“Pocket ocean”, contrasted regimes, easy to access, highly instrumented
General objectives“User/Level 4 CalVal” (not instrumental CalVal)Showcase scientific applications of SWOTCalVal through consistency of SWOT with in situ (process studies)
Highlights
Ecological end-to-end processes- chlorophyll is a good tracer of fine scales, when the context is known- science: open questions on the ecological structure effect of the fine scales (phytoplankton to higher trophic levels)
Calendar
2018-2020 fine-scale biophysical regional characterization
2021- attempt a reconstruction of the time-varying 3D velocity field and Lagrangian fluxes;
validate (consistency) with 2D and 3D swarms of drifters; match with biological dynamics- High throughput automated cytometry (maps of phytoplankton types)- active acoustics for mid-trophic layers (zooplankton and fish)- gliders with passive acoustics (cetaceans)- aerial photography (cetaceans and tuna)
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30 researchers, ~13 studentsfrom the Mediterranean basin
FineMed 2017
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6 lectures/reviews and 13 seminars on fine scale dynamics, Mediterranean circulation, and biophysical coupling, from biogeochemistry, to genomics up top predators.
Exercise for PhD students: design a fine-scale, interdisciplinary cruise in the Mediterranean
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Main outcomes of FineMed meeting
Campaign west Med 2018
Snapshots of the fine-scale structure of biophysical coupling
- SHOM: 2 weeks ship time + SeaSoar-A. Pascual: one week R/V SOCIB- MIO: Cytosense + MVP- airplane + lidar from univ. Caen (pending funding)- gliders (pending funding)- Preliminary results of the PEACETIME cruise on the West Med crossover
2021
Time evolution of the fine-scale biophysical coupling, with a focus on 3D Lagrangian fluxes
- contacts with P. Franks for neutrally buoyant swarm of drifters- Declaration of interest from NATO (CMRE), Italy (CNR), SHOM for pooling ships and instr.- Cnes geodesy service willing to prepare a locally improved MDT in operation areas- Eastern Med crossover “adopted” through the PERLE cons. (France, Turkey, Israel, Cyprus)
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West Mediterranean
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West Med study area for 2018&2021 – first MVP survey during PEACETIME (1-15 June 2017)
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SWOT simulator – impact of noise (SSH)
Slide courtesy of A. Pascual
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Contributions – 1: SHOM
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R/V SOCIB
Contributions - 2
PI: A. Pascual; Spanish CSIC funding
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Abu
nd
ance
(N
/mL
)
10000
15000
20000
25000
30000
35000
40000SynechococcusProchlorococcus
Flu
ore
sce
nce
(a
.u.)
0,32
0,34
0,36
0,38
0,40
0,42
0,44
Ab
un
da
nce
(N
/mL
)
0
20
40
60
80
100
120
MicroEukaryoteCryptophyte like
Ab
un
da
nce
(N
/mL
)
400
600
800
1000
1200
1400
1600
1800
PicoEukaryoteNanoEukaryote
Underway phytoplankton assemblages (G. Gregori, M. Thyssen, A. Doglioli)
T [oC]S [opsu]
Prochlo
Synecho
Pico
Nano
Crypto
Micro
Fluo
BIOSWOT – some experimental results of the 2016 OSCAHR cruiseMVP + cytometry
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Very preliminary results (1 week old) from the PEACETIME cruise June 2017, PIs: G. Guieu, K. Desboeuf
Slide courtesy of A. Doglioli
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East Mediterranean
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The East Med crossover covers the region targeted by the oceanographic program “PERLE”, an inter-Mediterranean consortium.
Some of the PERLE Pis were at FineMed
Clear possibility of extending PERLE to a “SWOT-PERLE” in 2021
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SWOT opportunities (“FineGlob?”) beyond FineMedArguments for a global “Adopt a SWOT cross-over” initiative for the fast sampling phase
Rationale- SWOT fast sampling phase (first months of the 2021 SWOT mission) is a once-in-a-lifetime opportunity to learn about the fine scales with their temporal scales, all over the world- Associate external groups to SWOT-ST for NRT-SWOT data access; they will find their funding; a critical minimal mass may be 5-6 groups- Recommend a minimal common set-up: underway CTD survey for 1-2 weeks + Chl- Let any group attach their regional-specific questions and instruments- Organise a special issue “The fine-scale global ocean” on a good journal, with a collective,synthesis paper.
Advantages
- The ocean has no “typical” and “non-typical” regions; SWOT is a global mission- The Med. case suggests an impressive SWOT leveraging effect- Cost-effective- Publication effective- Prepare a global community
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Some examples of 21 SWOT cross-over diamonds
Cross-over will resolve SSH structures down to 15 km with high temporal variability (once or twice per day) and reduced error.
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Neutrally-buoyant (or depth-holding) systemCheapNot very deep at the moment (50m) - improvements here expectedHorizontal deep position by triangulation of surface pinging floatsLinking vertical velocities to horizontal stirring
Emerging platforms for future fine-scale studies: swarms of 3D drifters
Jaffe et al., Nat. Comm. 2017
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Orbits: https://www.aviso.altimetry.fr/es/misiones/future-missions/swot/orbit.html
“CalVal” part of the mission (3-6 months): few “hotspots” revisited twice per daynominal part: global coverage, repeat period of 21 days
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