Characteristics of the frequency spectra of wind-waves in Eastern Black Sea

Spectral Partitioning and Swells in the Black Sea

“…Despite these differences an estimate is made using the percentage of multi-peaked spectra for location Hopa collected intermittently in 41 months in the years 1994-1999, using the criterion that the significant wave height of the wind sea peak (HSPT01) and primary swell peak (HSPT02) both exceed 0.25 m and that their directions differ at least 90°, yielding the percentages 10%, 8%, 5% and 5% for winter, spring, summer and autumn, respectively. These numbers are much smaller than those of Yilmaz (2007), viz. 27%, 28%, 25% and 22%, probably due the additional directional difference criterion and the intermittency of the observations.…”

“…The Sea of Azov shows the least amount of multi-peaked wave spectra, indicating that it is limited in a physical sense to develop multi-peaked wave spectra. A comparison with results from Yilmaz (2007) is difficult to make due to differences in the method to detect multi-peaked spectra. Despite these differences an estimate is made using the percentage of multi-peaked spectra for location Hopa collected intermittently in 41 months in the years 1994-1999, using the criterion that the significant wave height of the wind sea peak (HSPT01) and primary swell peak (HSPT02) both exceed 0.25 m and that their directions differ at least 90°, yielding the percentages 10%, 8%, 5% and 5% for winter, spring, summer and autumn, respectively.…”

“…Spectral shapes were analyzed by Yilmaz (2007) using buoy data collected intermittently over 101 months in the period from 1994-2003 at the buoy locations of Sinop, Gelendzhik and Hopa. Of particular interest are her estimates of percentages of sufficiently well-resolved multi-peaked frequency spectra, each having a minimum total significant wave height of 0.5 m. A limitation of her study was that only frequency spectra were considered, and that no distinction was made between wind seas and swell waves.…”

“…Of particular interest are her estimates of percentages of sufficiently well-resolved multi-peaked frequency spectra, each having a minimum total significant wave height of 0.5 m. A limitation of her study was that only frequency spectra were considered, and that no distinction was made between wind seas and swell waves. These initial works of Berkün (2007) and Yilmaz (2007) were a good step towards a more elaborate statistical description of the swell climate.…”

A new method for calibration of unidirectional double-peak spectra

“…It should be noted that all previous efforts have been mainly conducted based on some sort of least square error minimization [19]. Some similar researches in this area include those conducted on TMA spectrum calibration [8] or JONSWAP spectrum calibration [21,22].…”