eumetsat future missions and products for …coastal altimetry cycle 6 pass 88 –australia land...
TRANSCRIPT
1 EUM/TSS/VWG/17/921787
Copernicus for coastal zone
monitoring and management
workshop,
Brussels, 29/06/2017
EUMETSAT Future Missions and
Products for Coastal Zones
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• EUMETSAT develops and operates satellite mission data services relevant for coastal zones globally:
• Sentinel-3 Marine – ocean and sea ice
• Jason-CS - ocean
• MSG MTG – ocean, land, atmosphere
• Metop Metop-SG – ocean, land, atmosphere, sea ice
• EUMETSAT offers a consistent portfolio of data services
• and ensures long term sustainment, consistency and
synergy within missions• with limitations in spatial and temporal resolutions wrt.
the needs of coastal zone observation e.g. resolving short spatial and /or temporal scale processes
Introduction
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• Synergy between Sentinel-3 instruments• Co-located simultaneous observations in the Visible
(OLCI), Near Infra-Red (OLCI and SLSTR), Infra-Red (SLSTR)
• Provide better view of atmospheric processes affecting the surface observations: clouds and aerosols
• Improve cloud clearing and atmosphere correction• Synergy across missions
• Sea surface winds: altimeters and scatterometers
• Combination of spatial resolution (S2) and spectral resolution (S3 OLCI)
• Combination of spectral resolution (S3 OLCI) and temporal resolution (MTG FCI)
Remote Sensing of Coastal Zones – Opportunities
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• Sentinel-3 offers improved coastal coverage
• Dense ground track pattern (2 satellites in 27-day repeats)
• SAR altimetry, reducing footprint size to approx. 300 meters along-track
• Ability to better filter out influence of land on measurements
• Studies show that meaningful data can still be retrieved at 2 km from the coast, down from about 5 km with conventional altimetry
Coastal altimetry
Cycle 6 Pass 88 – Australialand ocean
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• Sea Surface winds derived from Scatterometers
• ASCAT on Metop satellites
• SCA on Metop-SG
• Developed and provided through EUMETSAT OSI SAF
• Wind speed and direction at the sea surface using the back-scatter signal from satellite at spatial resolution of ca. 12 km
• Measurements even through cloud layers
• Indispensible tool for nowcasting(direct) and forecasting (through assimilation in models)
Scatterometer Winds
Record-breaking Tropical Cyclone Winston devastated parts of Fiji when it hit the archipelago in February 2016.
Metop-B AVHRR infrared image with ASCAT winds overlaid, 21 Feb 2016 21:34 UTC
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Scatterometer Winds: Land fraction for better coastal
coverage• Coastal Zone: mixed
land-water pixels are
contaminated by the
land echo and not
usable for wind retrieval
• Land Fraction:
improved coverage of
scatterometer winds in
coastal zones
• Currently being
implemented for Metop
ASCAT Level-1 product
• Will be included for
Metop-SG SCA
Level-1B wind speeds Level-1B wind speeds
with improved coverage
of the coastal zones
(prototype)
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Storm surge
• Coastal altimetry (1-D satellite track)
• Comparison to tide gauges (0-D)
• Comparison to tidal and storm surge models (2-D)
• Wave height, wind speed (also from altimetry)
• Wind speed and direction (scatterometer: 2-D satellite swath)
• Improved prediction of
surge height and timing
• Shipping warning
• Coastal evacuation
• Closing surge barriers
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Synergies of
OLCI / SLSTR
Sentinel-3 OLCI-SLSTR synergy for cloud screening, surface type identification, coastal applications
(510 nm)
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Sediment transport monitoring from geostationary and polar platforms: MSG SEVIRI and S3 OLCI
TUR (NTU)
Sentinel-3A OLCI RGB image
11 May 2017
showing:
• East Anglian sediment plume
• Waddenzee erosion/sedimentation
• open sea coccolithophore blooms
MSG SEVIRI prototype
geostationary
water turbidity product
August 2008
showing:
• East Anglian sediment plume
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River Sediment Outflow
Sentinel-3 OLCI A Water Leaving Radiance at 665 nm as a proxy for suspended matter
7 September 2016Ref. NOAA OCview
Kara Sea(Ob and Yenisey river)
Laptev Sea (Lena river)
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• Consistent bio-geo-chemical and optical in situ measurements in complex coastal waters
• Necessary for processing and interpretation
• Protocols and best practices : • Subject of inter-agency coordination at IOCCG
• Addressed by ESA’s FRM4SOC
• Need for broad deployment covering the variability of water types prevailing in coastal zones /shelf seas
• Aerosol optical properties and ocean colour• Ocean colour missions rely critically on existing AERONET-OC
• Sea level• Altimeter missions rely critically on existing tide gauge network
• Sea Surface Temperature• SST missions rely critically on existing buoys and drifters network
• Ship-borne radiometers are few but very important• Winds, Significant Wave Height
• Altimeter and scatterometer missions rely critically on existing buoy network
Fiducial Reference Measurements (FRM)
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• EUMETSAT current missions have potential to fulfill important coastal zone observation needs
• Coastal altimetry
• Winds near coast
• Surface temperature
• Water constituents and water quality from ocean colour
• EUMETSAT planned missions expand that potential further
• S-3B + S-3A: Spatial coverage improvement, better chances of cloud-free observations for optical measurements
• SAR altimetry constellation S-3, S-6: spatial and temporal coverage
• MTG: ocean colour, temporal resolution, cloud clearing
Conclusions / Way forward