Summary
“Koshava” is a gusty wind of changeable intensity, blowing from a south-easterly direction, over Serbia, Romania and Bulgaria. It is caused by the interaction between the synoptic circulation and the orography of the Carpathian and the Balkan mountains.
This paper analyzes wind data measured at the Belgrade-Observatory during the longest period of consecutive days of “Koshava” which occurred from 14 January to 13 February 1972. Mean hourly wind speed data has been examined using spectral analysis. The power spectra are calculated using autocorrelation spectral analysis, the multi-taper method and wavelet transform. The maximum of which is about 122 h (5 days) corresponds to the time span of synoptic processes.
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References
RB Blackman JW Tukey (1958) The measurement of power spectra Dover Publications New York
I Daubechies (1988) ArticleTitleOrthonormal bases of compactly wavelets Commun Pure Appl Math 41 909–996 Occurrence Handle10.1002/cpa.3160410705
M Farger (1992) ArticleTitleWavelet transforms and their applications to turbulence Ann Rev Fluid Mech 24 395–457 Occurrence Handle10.1146/annurev.fl.24.010192.002143
K Gurley A Kareem (1999) ArticleTitleApplications of wavelet transforms in earthquake, wind, and ocean engineering Engineering Structures 21 149–167 Occurrence Handle10.1016/S0141-0296(97)00139-9
K Hunt GP Nason (2001) ArticleTitleWind speed modelling and short-term prediction using wavelets Wind Engineering 25 55–61 Occurrence Handle10.1260/0309524011495836
L Lazić I Tošić (2000) ArticleTitleSensitivity of forecast trajectories to wind data inputs during strong local wind conditions Idojaras 104 91–107
PC Liu AV Babanin (2004) ArticleTitleUsing wavelet spectrum analysis to resolve breaking events in the wind wave time series Annales Geophysicae 22 3335–3345 Occurrence Handle10.5194/angeo-22-3335-2004
ME Mann JM Lees (1996) ArticleTitleRobust estimation of background noise and signal detection in climatic time series Climatic Change 33 409–445 Occurrence Handle10.1007/BF00142586
M Milosavljević (1950) Physical characteristics of wind in Belgrade Naučna knjiga Beograd 67
Mitchell JM, et al (1966) Climatic change. WMO Tech Note 79. WMO No 179. Geneva, 79 pp
S Stanojević (1959) ArticleTitleVetar košava kao klimatski modifikator Zbornik radova Poljoprivrednog fakulteta 275 1–12
DJ Thomson (1982) ArticleTitleSpectrum estimation and harmonic analysis Proc IEEE 70 1055–1096 Occurrence Handle10.1109/PROC.1982.12433
C Torrence GP Compo (1998) ArticleTitleA practical guide to wavelet analysis Bull Amer Meteor Soc 79 61–78 Occurrence Handle10.1175/1520-0477(1998)079<0061:APGTWA>2.0.CO;2
M Unkašević J Mališić I Tošić (1998) ArticleTitleOn some new statistical characteristics of the wind Kosahava Meteor Atmos Phys 66 11–21 Occurrence Handle10.1007/BF01030445
M Unkašević J Mališić I Tošić (1999) ArticleTitleSome aspects of the wind “Koshava” in the lower Troposphere over Belgrade Meteorol Appl 6 69–80 Occurrence Handle10.1017/S1350482799000997
Vukmirović D (1997) Ventilation factor during Koshava. XXV Savetovanje “Zaštita vazduha 97”, Belgrade, 19–21 XI 1997
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Unkašević, M., Tošić, I. & Obradović, M. Spectral analysis of the “Koshava” wind. Theor. Appl. Climatol. 89, 239–244 (2007). https://doi.org/10.1007/s00704-006-0261-5
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DOI: https://doi.org/10.1007/s00704-006-0261-5