Development of the glider system In-Situ Observations MERSEA 3rd annual meeting London, 06.03.2006 IFM-GEOMAR, Kiel, Germany IMEDEA, Esporles, Spain IFREMER, LPO, Coriolis, CERSAT, Brest, France, LOCEAN, Paris, France, MERCATOR, Toulouse, France SIO, LaJolla, CA, USA
MERSEA 3rd annual meeting London, 06.03.2006. In-Situ Observations. Development of the glider system. IFM-GEOMAR, Kiel, Germany IMEDEA, Esporles, Spain IFREMER, LPO, Coriolis, CERSAT, Brest, France, LOCEAN, Paris, France, MERCATOR, Toulouse, France SIO, LaJolla, CA, USA. - PowerPoint PPT Presentation
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Development of the glider system
In-Situ Observations
MERSEA 3rd annual meetingLondon, 06.03.2006
IFM-GEOMAR, Kiel, GermanyIMEDEA, Esporles, Spain
IFREMER, LPO, Coriolis, CERSAT, Brest, France,LOCEAN, Paris, France,
MERCATOR, Toulouse, FranceSIO, LaJolla, CA, USA
1) Gliders are driven by positive and negative buoyancy created by a change in volume. No propeller is required.
2) Wings convert vertical velocity into forward velocity.
3) Glide downward when denser than surrounding water and upward when buoyant, in a sawtooth pattern.
Coriolis data selection websitedata visualization and download
Quality Control and Metadata
QC procedures at Coriolis like for profiling floats. Profiles are considered as vertical.
- T and S outsiders based on historical data- Density inversions
are rejected
+ visual inspection
Metadata:Vehicle name, project, PIWaypoint (heading)Angle of ascent/descentTarget depthClimb depthTarget altitudeTime between surfacingCurrent correction
Dive #260 – “dirt“ in the conductivity cell
Assimilation of glider data
Temperature differences between MERCATOR North Atlantic 1/15°
and the in-situ observations
Before data assimilation
After data assimilation
glider
The model trajectory is modified by the data assimilation process,
to better fit the observations.
development required to better assimilate in-situ data
at the moment: correlation criteria for profiling floats
1 profile per 1°x1° per week>> in progress
Achievements and Plans
Demonstrated1) Steering possibility2) Long endurance3) Near real time physical and biogeochemical data 4) High density and resolution of the measurements5) Continuous measurements 6) Impact on operational numerical products
Next operations- Deployments in the Western Mediterranean
end of March
- Deployments in the North Atlantic1) Maintain surveys around PAP