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Multi-satellite/Operational Applications Splinter Summary. Chairs: G. Jacobs, C. Birkett, P. Oke March 2007 Ocean Surface Topography Science Team Meeting. Oral Presentations.

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Multi satellite operational applications splinter summary

Multi-satellite/Operational Applications Splinter Summary

Chairs: G. Jacobs, C. Birkett, P. Oke

March 2007

Ocean Surface Topography Science Team Meeting


Oral presentations

Oral Presentations

  • QueffeulouMerging wave height measurements from altimeters. Application to the investigation of large scale and regional features of sea state

  • LefevreWave Model Error Analysis from Altimetry

  • DorandeuFuture altimeter systems: is the mesoscale observability good enough for operational oceanography?

  • LarnicolQuality of real time altimeter maps: impact of data delay

  • BouffardImproved satellite altimetric data dedicated to coastal areas: Validation over the northwestern Mediterranean

  • TournadreEffect of rain and cloud on Ka band (ALTIKA) altimeter data

  • SteunouImpacts of atmospheric attenuations on AltiKa expected performances

  • AlpineMoveable Feasts: The Eddy and the MPA?

  • WilkinPredictability of Mesoscale Variability in the EAC given Strong Constraint Data Assimilation

  • GriffinExplaining the extraordinary: operational oceanography in Australia

  • OkeThe Bluelink Ocean Data Assimilation System: an ensemble approach to an eddy-resolving application

  • BrassingtonBluelink> ocean model analysis and prediction system delivering operational forecasts

  • HobdayNear real-time spatial management for a longline bycatch species based on sea surface topography and temperature observations

  • VerronAltiKa: a Ka-band altimetry system in tandem with JASON-2

  • ChaoDevelopment, Implementation and Evaluation of a Real-Time Ocean Forecasting System off the California Coast

  • LagerloefCombining altimeter-derived currents with Aquarius salinity to study the marine freshwater budget


Poster presentations

Poster Presentations

  • HernandezValidation in operational oceanography at the global scale in the GODAE and MERSEA framework : Overview of the Mercator Global Operational system assessment

  • LamourouxControl of a free-surface barotropic model of the Bay of Biscay by assimilation of multi-source sea-level data (altimetry and tide-gauges) in presence of atmospheric forcing errors

  • LamourouxDesign of the future altimetry missions: a first prototype of an « end-to-end » mission simulator

  • PerryOcean Surface Topography Data at the JPL Physical Oceanography DAAC

  • SteunouAltiKa : a new concept of altimeter for the SARAL mission

  • UbelmannImpact of multisatellite altimetric missions on the Tropical Atlantic circulation from some Observing Systems Simulations Experiments

  • VandemarkInvestigating ocean altimeter data and applications in the Gulf of MaineS. VignudelliALTICORE - a consortium serving European Seas with Coastal Altimetry

  • KaplanPower spectral parameterizations of error as function of resolution in gridded altimetry maps

  • BlancSeadatanet, a pan-european infrastructure for ocean & marine data management

  • OkeA method for estimating representation error of oceanic observations

  • BirkettNear Real Time Monitoring of Global Lakes and Reservoirs

  • BouffardA view from multi-mission satellite altimetry over the coastal ocean: application to the Ligurian Sea and the Corsica Channel

  • DorandeuSSALTO/DUACS : Daily multi-mission products for global and regional applications

  • GarcíaMediterranean water mass budget variations: revisited

  • HelbertGeneration of DEMs for the new tracking mode onboard Poseidon-3 and AltiKa


Topics covered

Topics covered

  • Issues in data assimilation

  • Waves

  • Applications to fisheries

  • Data Provision

  • Coastal and regional studies

  • Observing systems


Issues in data assimilation

Issues in Data Assimilation

  • WilkinPredictability of Mesoscale Variability in the EAC given Strong Constraint Data Assimilation

  • OkeThe Bluelink Ocean Data Assimilation System: an ensemble approach to an eddy-resolving application

  • BrassingtonBluelink> ocean model analysis and prediction system delivering operational forecasts

  • ChaoDevelopment, Implementation and Evaluation of a Real-Time Ocean Forecasting System off the California Coast

  • LarnicolQuality of real time altimeter maps: impact of data delay

  • KaplanPower spectral parameterizations of error as function of resolution in gridded altimetry maps

  • OkeA method for estimating representation error of oceanic observations

  • LamourouxControl of a free-surface barotropic model of the Bay of Biscay by assimilation of multi-source sea-level data (altimetry and tide-gauges) in presence of atmospheric forcing errors

  • HernandezValidation in operational oceanography at the global scale in the GODAE and MERSEA framework : Overview of the Mercator Global Operational system assessment


Issues in data assimilation1

1-day forecast

8-day forecast

15-day forecast

0 lag –analysis skill

1 week lag –little loss of skill

2 week lag – forecast beginsto deteriorate

3 week lag – forecast still better than …

no assimilation

Issues in Data Assimilation

Ensemble forecasts (white), ensemble mean (black) and obs (colour)

RMS difference between ROMS subsurface temperature predictions and all XBT observations in 2001-2002 in the Tasman Sea

SSH

+ SST

SSH

+ SST

+ XBT

… forecast skill of a i4DVar system

… importance of sub-surface assimilation for forecast skill

Wilkin et al.


Issues in data assimilation2

Issues in Data Assimilation

… results from Bluelink ReANalysis (above)

Oke et al.

… OceanMAPS undergoing operational trials

Brassington et al.


Issues in data assimilation3

Issues in Data Assimilation

Chao et al


Waves

Waves

  • QueffeulouMerging wave height measurements from altimeters. Application to the investigation of large scale and regional features of sea state

  • LefevreWave Model Error Analysis from Altimetry

  • In areas of wave generation, model wave heights are too low (in red) and in areas where swell is dominant, model wave heights are too high (in blue).

  • Comparisons with altimetry  understanding of model errors  led to improvements in model physics


Applications to fisheries

Applications to Fisheries

  • HobdayNear real-time spatial management for a longline bycatch species based on sea surface topography and temperature observations

  • AlpineMoveable Feasts: The Eddy and the MPA?

Using value-added products that are derived from altimetry for flexible ocean management

Alpine et al.

Habitat preferences

Habitat prediction

+

3D ocean info

Management

decision

Hobday et al.


Data provision

Data Provision

  • PerryOcean Surface Topography Data at the JPL Physical Oceanography DAAC

  • BirkettNear Real Time Monitoring of Global Lakes and Reservoirs

  • DorandeuSSALTO/DUACS : Daily multi-mission products for global and regional applications

NRT monitoring of sea-level in lakes and reserviors, www.pecad.fas.usda.gov/cropexplorer/global_reservoir

Application for agriculture, water resources, irrigation potential, long-term drought …

Birkett et al.


Coastal regional studies

Coastal / regional studies

  • GriffinExplaining the extraordinary: operational oceanography in Australia

  • BouffardImproved satellite altimetric data dedicated to coastal areas: Validation over the northwestern Mediterranean

  • BouffardA view from multi-mission satellite altimetry over the coastal ocean: application to the Ligurian Sea and the Corsica Channel

  • VandemarkInvestigating ocean altimeter data and applications in the Gulf of MaineS. VignudelliALTICORE - a consortium serving European Seas with Coastal Altimetry

  • GarcíaMediterranean water mass budget variations: revisited

15 degree water off NSW in summer!

Adelaide Advertiser …

Griffin et al.


Observing systems

Observing Systems

  • TournadreEffect of rain and cloud on Ka band (ALTIKA) altimeter data

  • SteunouImpacts of atmospheric attenuations on AltiKa expected performances

  • SteunouAltiKa : a new concept of altimeter for the SARAL mission

  • HelbertGeneration of DEMs for the new tracking mode onboard Poseidon-3 and AltiKa

  • WilkinPredictability of Mesoscale Variability in the EAC given Strong Constraint Data Assimilation

  • OkeThe Bluelink Ocean Data Assimilation System: an ensemble approach to an eddy-resolving application

  • EscudierFuture altimeter systems: is the mesoscale observability good enough for operational oceanography?

  • LarnicolQuality of real time altimeter maps: impact of data delay

  • UbelmannImpact of multisatellite altimetric missions on the Tropical Atlantic circulation from some Observing Systems Simulations Experiments

  • LamourouxDesign of the future altimetry missions: a first prototype of an «end-to-end» mission simulator

  • LagerloefCombining altimeter-derived currents with Aquarius salinity to study the marine freshwater budget

  • VerronAltiKa: a Ka-band altimetry system in tandem with JASON-2

  • TournadreEffect of rain and cloud on Ka band (ALTIKA) altimeter data

  • SteunouImpacts of atmospheric attenuations on AltiKa expected performances


Observing systems1

Observing Systems

Verron et al.  OSSEs for the choice of AltiKa orbit

Mid-latitudes:

Compare performance of assimilating model using Jason-2 + 10, 17 or 35 day AltiKa satellite

 35 day AltiKa seems a good compromise for mid-latitudes


Observing systems2

  • Probability to have:

  • 2 satellites in delayed time (red),

    • 3 satellites in near real time (blue)

Observing Systems

EKE differences between

4 & 2 satellites missions

(Units are in cm2/s2)

Comparison with tide gauges

… Escudier et al., Larnicol et al.


Observing systems3

Observing Systems

Applications to climate, tropical, etc.

… Lagerloef et al.


Conclusions

Conclusions

  • Requirements

    • minimum of 2 satellites required to resolve mesoscale variability

    • 4 NRT satellites equivalent to 2 delayed-mode satellites

    • Assimilation of different data types increases redundancy in the GOOS

  • Applications: altimetry is considered the foundation of operational applications

    • Expected (e.g., search & rescue, military etc).

    • Coastal

    • Hurricane

    • Fisheries

    • Water resources

  • Looking ahead

    • Aquarius mission (SSS)

    • CRYOSAT fully exploited

    • AltiKa and CRYOSAT will require special treatment for full exploitation (ongoing efforts)

    • Extension of altimetry towards the coast shows promise (ongoing)


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