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

2007 OSTST Meeting Oral Presentations 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 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?

2007 OSTST Meeting Poster Presentations 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 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

2007 OSTST Meeting Topics covered Issues in data assimilation Waves Applications to fisheries Data Provision Coastal and regional studies Observing systems

2007 OSTST Meeting 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

2007 OSTST Meeting Issues in Data Assimilation … forecast skill of a i4DVar system … importance of sub-surface assimilation for forecast skill Wilkin et al. 0 lag – analysis skill 1 week lag – little loss of skill 2 week lag – forecast begins to deteriorate 3 week lag – forecast still better than … no assimilation RMS difference between ROMS subsurface temperature predictions and all XBT observations in in the Tasman Sea 15-day forecast1-day forecast8-day forecast SSH + SST SSH + SST + XBT Ensemble forecasts (white), ensemble mean (black) and obs (colour)

2007 OSTST Meeting Issues in Data Assimilation … results from Bluelink ReANalysis (above) Oke et al. … OceanMAPS undergoing operational trials Brassington et al.

2007 OSTST Meeting Issues in Data Assimilation Chao et al

2007 OSTST Meeting 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

2007 OSTST Meeting 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? Management decision + Habitat preferences 3D ocean info Habitat prediction Using value-added products that are derived from altimetry for flexible ocean management Alpine et al. Hobday et al.

2007 OSTST Meeting 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, Application for agriculture, water resources, irrigation potential, long-term drought … Birkett et al.

2007 OSTST Meeting 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 Adelaide Advertiser … 15 degree water off NSW in summer! Griffin et al.

2007 OSTST Meeting 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 Systems

2007 OSTST Meeting Observing Systems Verron et al.  OSSEs for the choice of AltiKa orbit Mid-latitudes: Compare performance of assimilating model using Jason , 17 or 35 day AltiKa satellite  35 day AltiKa seems a good compromise for mid-latitudes

2007 OSTST Meeting Observing Systems … Escudier et al., Larnicol et al. EKE differences between 4 & 2 satellites missions (Units are in cm 2 /s 2 ) Probability to have: 2 satellites in delayed time (red), 3 satellites in near real time (blue) 2 missions 4 missions Delayed time new corrections (GOT00+DAC) Real time Orbit error No-centring Comparison with tide gauges

2007 OSTST Meeting Observing Systems Applications to climate, tropical, etc. … Lagerloef et al.

2007 OSTST Meeting 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)