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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

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

  • Lefevre Wave Model Error Analysis from Altimetry

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

  • Larnicol Quality of real time altimeter maps: impact of data delay

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

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

  • Steunou Impacts of atmospheric attenuations on AltiKa expected performances

  • Alpine Moveable Feasts: The Eddy and the MPA?

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

  • Griffin Explaining the extraordinary: operational oceanography in Australia

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

  • Brassington Bluelink> ocean model analysis and prediction system delivering operational forecasts

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

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

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

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


Poster presentations
Poster Presentations

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

  • Lamouroux Control 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

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

  • Perry Ocean Surface Topography Data at the JPL Physical Oceanography DAAC

  • Steunou AltiKa : a new concept of altimeter for the SARAL mission

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

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

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

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

  • Oke A method for estimating representation error of oceanic observations

  • Birkett Near Real Time Monitoring of Global Lakes and Reservoirs

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

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

  • García Mediterranean water mass budget variations: revisited

  • Helbert Generation 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

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

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

  • Brassington Bluelink> ocean model analysis and prediction system delivering operational forecasts

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

  • Larnicol Quality of real time altimeter maps: impact of data delay

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

  • Oke A method for estimating representation error of oceanic observations

  • Lamouroux Control 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

  • Hernandez Validation 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.



Waves
Waves

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

  • Lefevre Wave 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

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

  • Alpine Moveable 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

  • Perry Ocean Surface Topography Data at the JPL Physical Oceanography DAAC

  • Birkett Near Real Time Monitoring of Global Lakes and Reservoirs

  • Dorandeu SSALTO/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

  • Griffin Explaining the extraordinary: operational oceanography in Australia

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

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

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

  • García Mediterranean water mass budget variations: revisited

15 degree water off NSW in summer!

Adelaide Advertiser …

Griffin et al.


Observing systems
Observing Systems

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

  • Steunou Impacts of atmospheric attenuations on AltiKa expected performances

  • Steunou AltiKa : a new concept of altimeter for the SARAL mission

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

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

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

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

  • Larnicol Quality of real time altimeter maps: impact of data delay

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

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

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

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

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

  • Steunou Impacts 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

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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