Data management: Data sources & Quality control. Sea level measurements.
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Transcript of Data management: Data sources & Quality control. Sea level measurements.
![Page 1: Data management: Data sources & Quality control. Sea level measurements.](https://reader035.fdocuments.us/reader035/viewer/2022062423/56649ee55503460f94bf401a/html5/thumbnails/1.jpg)
Data management: Data sources & Quality control
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Sea level measurements
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Absolute sea level
Src: Per Knudsen
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Measurement system
Src: JPL
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Satellite laser ranging
Src: Schrama
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TOPEX/Poseidon Groundtrack
Src: Schrama
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History
Satellite Years Organisation Accuracy
SKYLAB 1972 NASA 20 m
GEOS-3 1975-1978 NASA 3 m
SEASAT 1978 NASA 2 m
GEOSAT 1985-1990 US Navy 30 cm
ERS-1 1991-1996 ESA 4-10 cm
ERS-2 1995-2006 ESA 4 cm
T/P 1992-2005 NASA/CNES 2 .. 3 cm
GFO 2000-2008 US Navy 2 .. 5 cm
ENVISAT 2002-2012 ESA 2 .. 3 cm
JASON-1 2001- NASA/CNES 2 .. 3 cm
JASON-2 2008- NASA/CNES 2 .. 3 cm
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Corrections applied
• Orbit • Mean Sea Surface (MSS)• Dry troposphere• Wet troposphere (composite*)• Ionosphere• Sea State Bias• Ocean tide and loading tide• Solid Earth tide• Pole tide• Combined atmospheric correction• Specific corrections (per satellite)
Src: http://www.aviso.oceanobs.com/
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Envisat: specific corrections
Src: cls.dot
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Data
http://www.aviso.oceanobs.com
Trends maps - public
Along-track – restricted
Real-time - restricted
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Relative sea level
Src: Peter L Johnson
new
old
Fort Denison in Sydney, Australia
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Different gauges
Src: ioc manual
Bubbler pressure gauge
Still well gaugeNext-Generation Water Level MeasurementSystem
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Radar tide gauge
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Bottom Pressure Gauge
Src: Aarup
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Datasets
Monthly, Annual:
Permanent Service for Mean Sea Level (PSMSL)
GLOSS Delayed Mode Higher Frequency (DM HF) Data Sets:
British Oceanographic Data Centre (BODC),
University of Hawaii Sea Level Center (UHSLC)
GLOSS Fast Mode Higher Frequency Data Sets
University of Hawaii Sea Level Center (UHSLC)
Status:
IOC-Sea-level Station Monitoring Facility
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PSMSL stations
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Censoring effect
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Bathymetry
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Global bathymetry
Src: gebco
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Measuring coastal bathymetry
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Single beam measurement
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Bathymetry
Src: openearth
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Synthetic Aperture Radar
spaceoffice.nl
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Flight tracks
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Nearshore Bathymetry/Topography