multi-satellite/operational applications splinter summary
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2007OSTSTMeeting
Multi-satellite/Operational Applications Splinter Summary
Chairs: G. Jacobs, C. Birkett, P. Oke
March 2007
Ocean Surface Topography Science Team Meeting
2007OSTSTMeeting Oral Presentations
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
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?
2007OSTSTMeeting Poster PresentationsKaplan 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
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
2007OSTSTMeeting Topics covered
•Issues in data assimilation
•Waves
•Applications to fisheries
•Data Provision
•Coastal and regional studies
•Observing systems
2007OSTSTMeeting 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
2007OSTSTMeeting 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 beginsto deteriorate
3 week lag – forecast still better than …
no assimilation
RMS difference between ROMS subsurface temperature predictions
and all XBT observations in 2001-2002 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)
2007OSTSTMeeting Issues in Data Assimilation
… results from Bluelink ReANalysis (above)
Oke et al.
… OceanMAPS undergoing operational trials
Brassington et al.
2007OSTSTMeeting 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 physics0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
0
1
2
3
4
5
6
7
8
9
10
11
Time in days
Sig
. w
av
e h
eig
ht
(m) buoy 44141
OBSWAM-MAWAM-BIWAM-C4
2007OSTSTMeeting 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?
Managementdecision
+
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.
2007OSTSTMeeting 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.
2007OSTSTMeeting 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
Adelaide Advertiser …
15 degree water off NSW in summer!
Griffin et al.
2007OSTSTMeeting
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 Systems
2007OSTSTMeeting 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
2007OSTSTMeeting Observing Systems
… Escudier et al., Larnicol et al.
EKE differences between4 & 2 satellites missions
(Units are in cm2/s2)
00
.20
.40
.60
.81
2007 2008 2009 2010 2011 2012 2013 2014
Jason-2 (old T/P track, not stacking
with Jason-1)
CryoSat
Jason-1 tandem phase (new ground track covered)
AltiKa
End of ENVISAT
Sentinel-3x 2
00
.20
.40
.60
.81
2007 2008 2009 2010 2011 2012 2013 2014
Jason-2 (old T/P track, not stacking
with Jason-1)
CryoSat
Jason-1 tandem phase (new ground track covered)
AltiKa
End of ENVISAT
Sentinel-3x 2
Probability to have: 2 satellites in delayed time (red),
3 satellites in near real time (blue)
2 missions
4 missions
Delayed timenew corrections(GOT00+DAC)
36.7 29.7
Real timeOrbit errorNo-centring
45.2 37.1
Comparison with tide gauges
2007OSTSTMeeting 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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