Advances in Science and Research
www.adv-sci-res.net
1992-0628
1992-0636
2
7th EMS Annual Meeting and 8th European Conference on Applications of Meteorology 2007
2008
10.5194/asr-2-81-2008
http://www.adv-sci-res.net/2/81/2008/
http://www.adv-sci-res.net/2/81/2008/asr-2-81-2008.html
http://www.adv-sci-res.net/2/81/2008/asr-2-81-2008.pdf
81
87
2008-05-27
High resolution modelling results of the wind flow over Canary Islands during the meteorological situation of the extratropical storm Delta (28–30 November 2005)
O. Jorba
oriol.jorba@bsc.es
C. Marrero
E. Cuevas
J. M. Baldasano
Earth Sciences Department, Barcelona Supercomputing Center – Centro Nacional de Supercomputación (BSC-CNS), Barcelona, Spain
Izaña Atmospheric Research Center, National Institute of Meteorology, Tenerife, Spain
Environmental Modelling Laboratory, Technical University of Catalonia (UPC), Barcelona, Spain
On 28–29 November 2005 an extratropical storm affected the Canary Islands
causing significant damage related to high average wind speeds and intense
gusts over some islands of the archipelago. Delta was the twenty-sixth
tropical or subtropical storm of the 2005 Atlantic hurricane season. It
represents an unusual meteorological phenomenon for that region, and its
impacts were underestimated by the different operational meteorological
forecasts during the previous days of the arrival of the low near Canary
Islands.
<br><br>
The aim of this study is to reproduce the local effects of the flow that
were observed over the Canary Islands during the travel of the Delta storm
near the region using high-resolution mesoscale meteorological simulations.
The Advanced Research Weather Research & Forecasting Model (WRF-ARW) is
applied at 9, 3 and 1 km horizontal resolution using ECMWF forecasts as
initial and boundary conditions. The high-resolution simulation will outline
the main features that contributed to the high wind speeds observed in the
archipelago. Variations in vertical static stability, vertical windshear and
the intense synoptic winds of the southwestern part of Delta with a warm
core at 850 hPa were the main characteristics that contributed to the
development and amplification of intense gravity waves while the large-scale
flow interacted with the complex topography of the islands.
Beven, J.: Tropical Cyclone Report on Tropical Strom Delta 22–28 November 2005, NOAA Tech. Note TCR-AL292005, Tropical Prediction Center, National Hurricane Center, 2006.
Doyle, J. D. and Shapiro, M. A.: A multi-scale simulation of an extreme downslope windstorm over complex topography, Meteorol. Atmos. Phys., 74, 83–101, 2000.
Dudhia, J.: Numerical study of convection observed during the winter monsoon experiment using a mesoscale two-dimensional model, J. Atmos. Sci., 46, 3077–3107, 1986.
Durran, D. R.: Another look at downslope windstorms. Part I: On the development of supercritical flow in an infinitely deep, continuously stratified fluid, J. Atmos. Sci., 43, 2527–2543, 1986.
Lilly, D. K. and Zipser, J.: The front range windstorm of 11 January 1972 – a meteorological narrative, Weatherwise, 25, 56–63, 1972.
Martín, F., Alejo, C. J., de Bustos, J. J., Calvo, F. J., San Ambrosio, I., Sánchez-Laulhé, J. M., and Santos, D.: Study of the tropical storm "Delta" and its extratropical transition: Meteorological impacts over Canary Islands (27–29 November 2005), Technical Report, Instituto Nacional de Meteorología, Madrid, 2006.
Estudio de la tormenta tropical "Delta" y su transición extratropical: Efectos meteorológicos en Canarias (27 a 29 de noviembre de 2005), 2005.
Michalakes, J., Dudhia, J., Gill, D., Henderson, T., Klemp, J., Skamarock, W., and Wang, W.: The Weather Research and Forecasting Model: Software architecture and performance, Proceedings of the Eleventh ECMWF Workshop on the Use of High Performance Computing in Meteorology, edited by: Zwiefhofer, W. and Mozdzynski, G., World Scientific, 156–168, 2005.
Mlawer, E. J., Taubman, S. J., Brown, P. D., Iacono, M. J., and Clough, S. A.: Radiative transfer for inhomogeneous atmosphere: RRTM, a validated correlated-k model for the longwave, J. Geophys. Res., 102(D14), 16 663–16 682, 1997.
National Hurricane Center: 2005 Atlantic Hurricane Season available at: http://www.nhc.noaa.gov/2005atlan.shtml, 2006.
Noh, Y., Cheon, W. G., Hong, S. Y., and Raasch, S.: Improvement of the K-profile Model for the Planetary Boundary Layer based on Large Eddy Simulation Data, Bound.-Lay. Meteorol., 107, 401–427, 2003.
Peltier, W. R. and Clark, T. L.: The evolution and stability of finite-amplitude mountain waves. Part II: Surface wave drag and severe downslope winds, J. Atmos. Sci., 36, 1498–1529, 1979.
Shapiro, M. A. and Keyser, D.: Fronts, jet streams and the tropopause, in: Extratropical Cyclones, The Erik Palmén Memorial Volume, edited by: Newton, C. W. and Holopainen, E. O., American Meteorology Society, 167–191, 1990.
Skamarock, W. C., Klemp, J. B., Dudhia, J., Gill, D. O., Barker, D. M., Wang, W., and Powers, J. G.: A Description of the Advanced Research WRF Version 2, NCAR Technical note NCAR/TN-468+STR, 2005.
Smirnova, T. G., Brown, J. M., and Benjamin, S. G.: Performance of different soil model configurations in simulating ground surface temperature and surface fluxes, Mon. Weather Rev., 125, 1870–1884, 1997.
Smirnova, T. G., Brown, J. M., Benjamin, S. G., and Kim, D.: Parameterization of coldseason processes in the MAPS land-surface scheme, J. Geophys. Res., 105(D3), 4077–4086, 2000.
Zhang, Y., Chen, Y. L., and Kodama, K.: Validation of the Coupled NCEP Mesoscale Spectral Model and an Advanced Land Surface Model over the Hawaiian Islands. Part II: A High Wind Event, Weather Forecast., 20, 873-895, 2005.