Remember Me
Or use your Academic/Social account:


Or use your Academic/Social account:


You have just completed your registration at OpenAire.

Before you can login to the site, you will need to activate your account. An e-mail will be sent to you with the proper instructions.


Please note that this site is currently undergoing Beta testing.
Any new content you create is not guaranteed to be present to the final version of the site upon release.

Thank you for your patience,
OpenAire Dev Team.

Close This Message


Verify Password:
Verify E-mail:
*All Fields Are Required.
Please Verify You Are Human:
fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
Belušić, Danijel; Bencetić Klaić, Zvjezdana (2004)
Publisher: Co-Action Publishing
Journal: Tellus A
Languages: English
Types: Article
A performance of the wind gust estimate (WGE) method on the bora wind has been examined. Numerical simulations of several bora episodes have been performed using a non-hydrostatic mesoscale model MEMO6. The model captured well the onset and cessation of the bora while the agreement between simulated and observed wind speeds differed from episode to episode. In cases with accurately simulated wind speeds, the WGE results were very good, thus indicating that the method could be used in forecasting bora gusts. The performance of the WGE method for the examined bora cases also suggested a possibility of further simplification of the method for the bora applications. Inspection of the bora flow and its thermodynamical structure revealed that after the bora onset the shear instabilities completely overwhelm the buoyant forces. This means that the parcels with the maximum wind speed in the boundary layer will always be able to reach the surface and result in wind gusts. Therefore, it is enough to have only a vertical profile of the wind speed. Although completely derived from the physical considerations, this represents a very simple way of determining bora wind gusts and can thus be easily implemented in the operational bora wind forecasting models.
  • The results below are discovered through our pilot algorithms. Let us know how we are doing!

    • Beg Paklar, G., Isakov, V., Koracˇin, D., Kourafalou, V. and Orlic´, M. 2001. A case study of bora-driven flow and density changes on the Adriatic Shelf (January 1987). Cont. Shelf Res. 21, 1751-1783.
    • Brasseur, O. 2001. Development and application of a physical approach to estimating wind gusts. Mon. Wea. Rev. 129, 5-25.
    • Caballero, R. and Lavagnini, A. 2002. A numerical investigation of the sea breeze and slope flows around Rome. Nouvo Cimento. 25C, 287- 304.
    • Cairns, M. M. and Corey, J. 2003. Mesoscale model simulations of highwind events in the complex terrain of western Nevada. Weather Forecast. 18, 249-263.
    • Carpenter, K. M. 1982. Note on the paper “Radiation condition for the lateral boundaries of limited area numerical models”. Q. J. R. Meteorol. Soc. 108, 717-719.
    • Enger, L. and Grisogono, B. 1998. The response of bora-type flow to seasurface temperature. Q. J. R. Meteorol. Soc. 124, 1227- 1244.
    • Glasnovic´, D. and Jurcˇec, V. 1990. Determination of upstream bora layer depth. Meteorol. Atmos. Phys. 43, 137-144.
    • Harten, A. 1986. On a large time-step high resolution scheme. Math. Comp. 46, 379-399.
    • Ivancˇan-Picek, B. and Tutisˇ, V. 1995. Mesoscale bora flow and mountain pressure drag. Meteorol. Z. 4, 119-128.
    • Ivancˇan-Picek, B. and Tutisˇ, V. 1996. A case study of a severe Adriatic bora on 28 December 1992. Tellus. 44A, 357-367.
    • Jurcˇec, V. 1981. On mesoscale characteristics of bora conditions in Yugoslavia. Pure Appl. Geophys. 119, 640-657.
    • Klaic´, Z. B. and Nitis, T. 2001-2002. Application of mesoscale model (MEMO) to the greater Zagreb area during summertime anticyclonic weather conditions. Geofizika. 18-19, 31-43.
    • Klaic´, Z. B., Nitis, T., Kos, I. and Moussiopoulos, N. 2002. Modification of the local winds due to hypothetical urbanization of the Zagreb surroundings. Meteorol. Atmos. Phys. 79, 1-12.
    • Klaic´, Z. B., Belusˇic´, D., Bulic´, I. H. and Hrust, L. 2003a. Mesoscale modeling of meteorological conditions in the lower troposphere during a winter stratospheric ozone intrusion over Zagreb, Croatia. J. Geophys. Res. 108, 4720.
    • Klaic´, Z. B., Belusˇic´, D., Grubisˇic´, V., Gabela, L. and C´ oso, L. 2003b. Mesoscale airflow structure over the northern Croatian coast during MAP IOP 15 - a major Bora event. Geofizika. 20, 23-61.
    • Klemp, J. B. and Durran, D. R. 1983. An upper boundary condition permitting internal gravity wave radiation in numerical mesoscale models. Mon. Wea. Rev. 111, 430-444.
    • Klemp, J. B. and Durran, D. R. 1987. Numerical modelling of bora winds. Meteorol. Atmos. Phys. 36, 215-227.
    • Lazic´, L. and Tosˇic´, I. 1998. A real data simulation of the Adriatic bora and the impact of mountain height on bora trajectories. Meteorol. Atmos. Phys. 66, 1-10.
    • Moussiopoulos, N. 1995. The EUMAC Zooming model, a tool for localto-regional air quality studies. Meteorol. Atmos. Phys. 57, 115-133.
    • Moussiopoulos, N. and Flassak, Th. 1989. A diagnostic wind model and its interactions with observations and experiments. In: Computers and Experiments in Fluid Flow (eds G. M. Carlomagno, and C. A. Brebbia). Springer-Verlag, Berlin, 239-250.
    • Orlic´, M., Kuzmic´, M. and Pasaric´, Z. 1994. Response of the Adriatic Sea to the bora and sirocco forcing. Cont. Shelf Res. 14, 91-116.
    • Peltier, W. R. and Scinocca, J. F. 1990. The origin of severe downslope windstorm pulsations. J. Atmos. Sci. 47, 2853-2870.
    • Petkovsˇek, Z. 1982. Gravity waves and bora gusts. Ann. Meteorol. 19, 108-110.
    • Petkovsˇek, Z. 1987. Main bora gusts - a model explanation. Geofizika. 4, 41-50.
    • Qian, M. W. and Giraud, C. 2000. A preliminary numerical simulation of bora wind with a limited area model of atmospheric circulation. Nouvo Cimento. 23C, 515-523.
    • Scinocca, J. F. and Peltier, W. R. 1989. Pulsating downslope windstorms. J. Atmos. Sci. 46, 2885-2914.
    • Scinocca, J. F. and Peltier, W. R. 1993. The instability of Long's stationary solution and the evolution toward severe downslope windstorm flow. Part I: nested grid numerical simulations. J. Atmos. Sci. 50, 2245-2263.
    • Scinocca, J. F. and Peltier, W. R. 1994. The instability of Long's stationary solution and the evolution toward severe downslope windstorm flow. Part II: the application of finite-amplitude local wave-activity flow diagnostics. J. Atmos. Sci. 51, 623-653.
    • Smith, R. B. 1987. Aerial observations of the Yugoslavian bora. J. Atmos. Sci. 44, 269-297.
    • Smith, R. B. 1991. Kelvin-Helmholtz instability in severe downslope wind flow. J. Atmos. Sci. 48, 1319-1324.
    • Tosˇic´, I. and Lazic´, L. 1998. Improved bora wind simulation using a nested Eta Model. Meteorol. Atmos. Phys. 66, 143-155.
    • Tudor, M. and Ivatek-Sˇ ahdan, S. 2002. MAP IOP 15 case study. Croat. Meteorol. J. 37, 1-14.
    • Wang, T.-A. and Lin, Y.-L. 1999. Wave ducting in a stratified shear flow over a two-dimensional mountain. Part II: implications for the development of high-drag states for severe downslope windstorms. J. Atmos. Sci. 56, 437-452.
  • No related research data.
  • No similar publications.

Share - Bookmark

Cite this article

Collected from