Www.argoss.nl New satellite based Web services for the marine and coastal community Gerard...

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



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


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


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



waveclimate_com215

Wave mode imagette captures each 200 km (2 per minute).

Global coverage, 1500 spectra per day over open water.

www.argoss.nl


www.argoss.nlwww.argoss.nlArea selection - waveclimate.com (screendump).


www.argoss.nlwww.argoss.nlwww.argoss.nlHistogram, distribution of sign. wave height - waveclimate.com.


www.argoss.nlHistogram, distribution of sign. wave height - waveclimate.com.


www.argoss.nlSeasonality plot of wind speed - waveclimate.com.


www.argoss.nlwww.argoss.nlScatter diagram. Percentage of occurrence of sign. wave height (m) in rows versus

wave direction in columns - waveclimate.com.


www.argoss.nlwww.argoss.nlMonthly distribution of sign. wave height (m) - waveclimate.com.


www.argoss.nlwww.argoss.nlwww.argoss.nlFitted curve for sign. wave height - waveclimate.com.


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


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


www.argoss.nlLocation selection - tidal-info.com


www.argoss.nlOutput selection - tidal-info.com


www.argoss.nlTimeseries - tidal-info.com


www.argoss.nlFlow velocity – tidal-info.com


www.argoss.nlHistogram – tidal-info.com


www.argoss.nlScatterdiagram - tidal-info.com


www.argoss.nl

www.tidal-info.com

• Accuracy:

– sea level 5-8%

– Currents 10-15%


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

Www.argoss.nl New satellite based Web services for the marine and coastal community Gerard...

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