Download - Www.argoss.nl New satellite based Web services for the marine and coastal community Gerard Hesselmans, Charles Calkoen and Han Wensink .

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