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SAF=Satellite Application Facility Distributed MSG/Metop ground segment

Søren Andersen, Morten Lind Rasmus Tonboe, DMI Steinar Eastwood, Vibeke Thyness, Harald Schyberg, Lars-Anders Breivik, Øystein Godøy, Jørg Haarpainter met.no. SAF=Satellite Application Facility Distributed MSG/Metop ground segment Other SAFS: NWP, Nowcasting, Climate, Land

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SAF=Satellite Application Facility Distributed MSG/Metop ground segment

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  1. Søren Andersen, Morten Lind Rasmus Tonboe, DMI Steinar Eastwood, Vibeke Thyness, Harald Schyberg, Lars-Anders Breivik, Øystein Godøy, Jørg Haarpainter met.no SAF=Satellite Application Facility • Distributed MSG/Metop ground segment • Other SAFS: NWP, Nowcasting, Climate, Land • To provide satellite derived products for use in the meteorological/oceanographic communities. http://saf.met.no SAF on Ocean and Sea Ice

  2. OSI SAF organisation • Consortium led by Meteo-France • High-latitude center led by met.no • 2 ice services • Backup / complementary production scheme • Shared responsibility for validation http://saf.met.no SAF on Ocean and Sea Ice

  3. General Objectives • Satellite derived Parameters describing the interface between atmosphere and ocean • 10 km resolution, covering Atlantic Ocean • Quantities to be calculated: • Ice concentration • Ice edge • Ice type • Radiative Fluxes • Sea Surface Temperature http://saf.met.no SAF on Ocean and Sea Ice

  4. Sea Ice Objectives Final products • Ice edge retrieved using SSM/I, scatterometer and AVHRR expressed as probability of ice infestation. • Dominant ice type using SSM/I, scatterometer and AVHRR expressed as probability of ice infestation with given type of ice. • Total sea ice concentration from SSM/I and possibly AVHRR. http://saf.met.no SAF on Ocean and Sea Ice

  5. Availability • Downloaded from the HL center homepage • Distributed via EUMETCAST • Pushed by internet or RMDCN. http://saf.met.no SAF on Ocean and Sea Ice

  6. Odden Jan-Feb 2004 http://saf.met.no SAF on Ocean and Sea Ice

  7. Validation • Objective validation is done routinely against DMI and met.no ice analyses based on AVHRR and/or SAR data • Summer conditions are problematic • East Greenland concentrations are consistently low http://saf.met.no SAF on Ocean and Sea Ice

  8. Ongoing development • Internal development • Global coverage (summer 2004)* • Quikscat/Seawinds (2004)* • Use of SSMIS sounding channels (2005) • Improved use of AVHRR (METOP/2007) • ASCAT (METOP/2007) • EU funded projects • IOMASA, improved ice conc. (2003-2006) • Mersea, ASAR global mode, AMSR (Apr. 2004) http://saf.met.no SAF on Ocean and Sea Ice

  9. Operational Methods Atmospheric correction of passive microwave obs. • Uses NWP model estimates of water vapour and wind http://saf.met.no SAF on Ocean and Sea Ice

  10. Global coverage 25 km resolution Northern and southern hemisphere products Atmospheric corrections from ECMWF global analysis/forecast http://saf.met.no SAF on Ocean and Sea Ice

  11. Multi sensor approach Bayesian approach for ice detection: Extended to combine several satellite observed parameters into an optimal ice class analysis Estimate ice class including measure of uncertainty http://saf.met.no SAF on Ocean and Sea Ice

  12. QuikScat • A priori statistics compiled from • colocation with DMI ice charts • Quantities used: • Polarization ratio • Mean horizontal backscatter • Mean vertical backscatter QuikScat SSM/I • Better determination of MY ice than SSM/I • More details in ice edge • Will be added to multi-sensor scheme in 2004 http://saf.met.no SAF on Ocean and Sea Ice

  13. Quikscat example Ice type 18 Febr – 4 March 2004 http://saf.met.no SAF on Ocean and Sea Ice

  14. Ice detection using AVHRR channel 3A (1.6 μm)Examples from April 2003 http://saf.met.no SAF on Ocean and Sea Ice

  15. RGB 1+2+4 A2/A1 A3/A1 T4-T5 Combinations of AVHRR channels http://saf.met.no SAF on Ocean and Sea Ice

  16. Training the system • Manually picking out areas where we are certain of the surface type. • Creating dataset based on these areas • Make sure that the dataset contains different types of ice & clouds, and different sun angles. Cloud Cloud Ice Ice Channel A3/A1 RGB (1+2+4) http://saf.met.no SAF on Ocean and Sea Ice

  17. Channel A3 / Channel A1 Cloud Sea Ice Channel A2 / Channel A1 Ice/Cloud/Sea separabilityResults for April 2003 http://saf.met.no SAF on Ocean and Sea Ice

  18. Further plans • Analyze one full year of AVHRR passages over North Atlantic / Arctic • Create PDF’s for the different surface signatures • Include new AVHRR method in O&SI-SAF ice cover product http://saf.met.no SAF on Ocean and Sea Ice

  19. Collaboration • Visiting scientist opportunities • Can be found on EUMETSAT web page • New projects can be proposed • A way to cooperate internationally • Previous visitors/visits: • University of Bremen (1-2), NIC (3), CIS (1), University of Dundee (1) • International Ice Charting Working Group • Cooperation agreements with NIC and CIS on validation • Scientific coordination http://saf.met.no SAF on Ocean and Sea Ice

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