Start Submission Become a Reviewer

Reading: Accuracy of the modelled wind and wave fields in enclosed seas

Download

A- A+
Alt. Display

Original Research Papers

Accuracy of the modelled wind and wave fields in enclosed seas

Authors:

Luigi Cavaleri ,

ISMAR, S. Polo 1364, 30125 Venice, IT
X close

Luciana Bertotti

ISMAR, S. Polo 1364, 30125 Venice, IT
X close

Abstract

The meteorological model of the European Centre for Medium-RangeWeather Forecasts, run with different resolutions, has been used to explore, with a number of numerical experiments, the underestimate of wind speeds and wave heights found in enclosed basins. Comparisons have been made between the results from the different runs, and also against satellite and buoy data.

It is found that the error depends on fetch, i.e. on the distance from the closest land from which the wind is blowing. Large errors are found at short fetches (order of 100 km), gradually decreasing with the distance from the coast. The error is larger and more persistent for waves. Increasing the resolution leads to an improvement of the results. However, the bias does not disappear at the highest resolution we have used (about 25 km).

Experiments with the single-point version of the meteorological model do not suggest that a slow development of the marine boundary layer is the main reason for the underestimate of the wind speeds.With respect to the mean orography, the use of envelope orography leads to a substantial increase of the marine wind speeds in the area affected by land.

How to Cite: Cavaleri, L. and Bertotti, L., 2004. Accuracy of the modelled wind and wave fields in enclosed seas. Tellus A: Dynamic Meteorology and Oceanography, 56(2), pp.167–175. DOI: http://doi.org/10.3402/tellusa.v56i2.14398
  Published on 01 Jan 2004
 Accepted on 10 Sep 2003            Submitted on 30 Sep 2002

References

  1. Abdalla , S. and Cavaleri , L., 2002 . Effect of wind variability and variable air density on wave modelling. J. Geophys. Res . 107 , No. C7, 17–1/17-17  

  2. Abdalla , S. , Janssen , P. A. E. M. and Bidlot , J.-R. 2002 . The use of satellite observations and enhanced physics to improve wind—wave predictions at ECMWF. 28th Int. Conf on Coastal Eng., Cardiff, UK, 7–12 July 2002.  

  3. Cavaleri , L. and Bertotti , L. 1997 . In search of the correct wind and wave fields in a minor basin . Mon. Wea. Rev . , 125 , 8 , 1964 – 1975 .  

  4. Cavaleri , L. and Teixeira , J. 2002 . Oscillations in an offshore blowing wind . Nuovo Cimento 25 , 2 , 175 – 183 .  

  5. Cavaleri , L. , Bertotti , L. and Lionello , P. 1991 . Wind wave cast in the Mediterranean Sea. J. Geophys. Res . 96 , C6 , 10739 – 10764 .  

  6. Doyle , J. D. and Shapiro , M. A. 1999 . Flow response to large-scale topography: the Greenland tip jet . Tellus 51A , 728 – 748 .  

  7. Franco , L. and Contini , P. 1997 . Wave measurements and climatology of the Italian seas . PIANC Bull . , 94 , 536 – 544 .  

  8. Janssen , P. A. E. M. 1989 . Wave-induced stress and the drag of air flow over sea waves . J. Phys. Oceanogr 19 , 745 – 754 .  

  9. Janssen , P. A. E. M. 1991 . Quasi-linear theory of wind wave generation applied to wave forecasting . J. Phys. Oceanogr 22 , 1600 – 1604 .  

  10. Janssen , P. A. E. M. 1998 . On error growth in wave models. Technical Memo No 249, Research Dept, ECMWF, UK, 12 pp.  

  11. Komen , G. J. , Cavaleri , L. , Donelan , M. , Hasselmann , K. , Hasselmann , S. and Janssen , P. A. E. M. 1994 . Dynamics and Modelling of Ocean Waves . Cambridge University Press , Cambridge , 532 pp.  

  12. Laing , A. K. and Brenstrum , E. 1996 . Scatterometer observations of low-level wind jets over New Zealand coastal waters . Wea. Forecast . , 11 , 4 , 458 – 475 .  

  13. Lott , F. and Miller , M. 1997 . A new subgrid-scale orographic parametrization: Its formulation and testing . Q. J. R. Meteorol. Soc . 123 , 101 – 127 .  

  14. Miller , M. , Hortal , M. and Jacob , C. 1995 . A major operational forecast model change . ECMWF News . 70 , 2 – 5 .  

  15. Olafsson , H. and Bougeault , P. 1996 . Nonlinear flow past an elliptic mountain ridge . J. Atmos. Sci . 53 , 17 , 2465 – 2489 .  

  16. Pielke , R. A. 2002 . Mesoscale Meteorological Modeling . Academic Press , New York , 676 pp.  

  17. Simmons , A. 1991 . Development of the operational 31-level T213 version of the ECMWF forecast model . ECMWF News . 56 , 3 – 13 .  

  18. Stull , R. B. 1988 . An Introduction to Boundary Layer Meteorology . Kluwer , Dordrecht , 666 pp.  

  19. Teixeira , J. 1997 . The One-column Model—Reference and User’s Guide . ECMWF , Reading .  

  20. Tibaldi , S. 1986 . Envelope orography and maintenance of quasi-stationary waves in the ECMWF model . Adv. Geophys . 29 , 339 – 374 .  

  21. Wallace , J. M. , Tibaldi , S. and Simmons , A. 1983 . Reduction of systematic forecast errors in the ECMWF model through the introduction of an envelope orography . Q. J. R. Met., Soc . 109 , 683 – 717 .  

  22. Zecchetto , S. and Cappa , C. 2001 . The spatial structure of the Mediterranean Sea winds revealed by ERS-1 scatterometer . Int. J. Remote Sensing 22 , 1 , 45 – 70 .  

comments powered by Disqus