www.argoss.nl new satellite based web services for the marine and coastal community gerard...
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www.argoss.nl
New satellite based Web services for the marine and coastal community
Gerard Hesselmans, Charles Calkoen and Han Wensink
www.argoss.nl
www.argoss.nlwww.argoss.nl
waveclimate_compresentatie2002
Program
1 Introduction and background
2 wind and waves
3 currents and sea level
www.argoss.nl© Van Oord ACZ
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Duration Spatial coverage Parameters
Ship’s observations > 50 yrs mainly shipping lanes wave height, wind Buoy records >10-20 yrs limited 1-D spectra, wind Numerical models > 10 yrs global 2-D spectra, wind Satellites > 10 yrs global wave height, spectra,
wind
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Sources of wind and wave climate data – waveclimate.com.
www.argoss.nl
www.waveclimate.com
• Database consisting of validated wind and wave observations based on different satellites missions since 1985.
• Web interface to generate, analyze and present online value added information
waveclimate_compresentatie2002
www.argoss.nl
www.waveclimate.com
• Main differences with other satellite observation providers
– Database contains 2D wave spectra.
– You only pay for the information downloaded.
– Each year database is updated with new quality checked observations.
– Infrastructure and helpdesk assuring access worldwide (maximum waiting time 2 seconds).
– Web based Value Added Services
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Wave mode imagette captures each 200 km (2 per minute).
Global coverage, 1500 spectra per day over open water.
www.argoss.nl
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www.argoss.nlwww.argoss.nlArea selection - waveclimate.com (screendump).
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www.argoss.nlwww.argoss.nlwww.argoss.nlHistogram, distribution of sign. wave height - waveclimate.com.
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www.argoss.nlHistogram, distribution of sign. wave height - waveclimate.com.
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www.argoss.nlSeasonality plot of wind speed - waveclimate.com.
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www.argoss.nlwww.argoss.nlScatter diagram. Percentage of occurrence of sign. wave height (m) in rows versus
wave direction in columns - waveclimate.com.
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www.argoss.nlwww.argoss.nlMonthly distribution of sign. wave height (m) - waveclimate.com.
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www.argoss.nlwww.argoss.nlwww.argoss.nlFitted curve for sign. wave height - waveclimate.com.
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www.argoss.nlwww.argoss.nlComparison with NOAA buoys in US coastal waters.
Significant wave height (1st table). Wind speed (2nd table).
Sensorbias [m]
StDev [m]
RRMSE %
ERS-1 altimeter -0.01 0.37 13ERS-2 altimeter 0.00 0.36 13Topex altimeter 0.04 0.27 10Poseidon altimeter 0.02 0.35 14
Sensorbias [m/s]
StDev [m]
RRMSE %
ERS-1 scatterometer 0.11 1.3 15ERS-2 scatterometer -0.34 1.2 16ERS-1 altimeter 0.03 1.5 18ERS-2 altimeter 0.03 1.6 19Topex altimeter 0.42 1.6 20Poseidon altimeter -0.08 1.5 18
waveclimate_compresentatie2002
www.argoss.nl
tidal_info_compresentatie2002
www.argoss.nl
www.tidal-info.com
• Database consisting of validated sea level observations based on 9 years TOPEX/POSEIDON and 73 tidal stations.
• Observations are assimilated into 2DH flow model globally (8km by 8km grid)
• Web interface to generate, analyze and present online value added information
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www.argoss.nlLocation selection - tidal-info.com
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www.argoss.nlLocation selection - tidal-info.com
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www.argoss.nlOutput selection - tidal-info.com
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www.argoss.nlTimeseries - tidal-info.com
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www.argoss.nlTimeseries - tidal-info.com
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www.argoss.nlFlow velocity – tidal-info.com
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www.argoss.nlHistogram – tidal-info.com
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www.argoss.nlScatterdiagram - tidal-info.com
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www.argoss.nl
www.tidal-info.com
• Accuracy:
– sea level 5-8%
– Currents 10-15%
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www.argoss.nl
postal addressp.o.box 618325 ZH Vollenhovethe Netherlands
telephone +31 527 242 299
telefax+31 527 242 016
e-mail [email protected]
websitewww.argoss.nl
www.argoss.nl