REAL-TIME ASSIMILATION USING A DENSE ARRAY OF DIRECTIONAL WAVE OBSERVATIONS

  • Pieter Bart Smit
  • Tim Janssen
  • Wheeler Gans
  • Cameron Dunning

Abstract

Wave conditions along our coastlines are monitored using networks of wave buoys. Augmented with regional wave now- and hind-casts from operational wave models, these data networks provide detailed regional information of wave conditions providing vital updates of wave conditions for maritime, engineering, recreational and scientific purposes. Currently, the observational networks are mostly used to initiate models and assess model performance, but are usually not directly integrated into the modeling system. Recent work by Crosby et al. (2017) explores the integration of buoy data into models and shows that data assimilation of buoy observations into models can improve predictions and wave hindcasts. The results suggest that assimilation of dense observational networks results in significant and important improvements in model performance. In the current work we leverage these modeling advances with the recent development of low-cost directional wave buoys (such as the Spoondrift Spotter, www.spoondrift.co). The use of low-cost and solar powered instruments allows for much denser long-term arrays of instruments than was previously possible. The availability of large numbers of independent observations, in turn, can provide excellent constrains on models and model boundary conditions.

References

Booij, Ris, Holthuijsen (1999), A third-generation wave model for coastal regions: 1. Model description and validation. J. GEOPHYS RES-OCEANS, 104.4, pp. 7649-7666

Crosby, Cornuelle, O'Reilly, Guza (2017): Assimilating global wave model predictions and deep water wave observations in nearshore swell predictions, J ATMOS OCEAN TECH, 34.8, pp.1823-1836

The WAVEWATCH III Development Group, WW3DG (2016), User manual and system documentation of WAVEWATCH III version 5,16, Tech. Note 329, NOAA/NWS/NCEP/MMAB

Published
2018-12-30
How to Cite
Smit, P. B., Janssen, T., Gans, W., & Dunning, C. (2018). REAL-TIME ASSIMILATION USING A DENSE ARRAY OF DIRECTIONAL WAVE OBSERVATIONS. Coastal Engineering Proceedings, 1(36), waves.6. https://doi.org/10.9753/icce.v36.waves.6