Wyniki wyszukiwania - Biblioteka Nauki

Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl

Ograniczanie wyników

2 TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Storm-surges Indicator for the Polish Baltic Coast

100%

Stanisławczyk I.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2012

tom Vol. 6, no. 1

123--129

Storm surges appear in the coastal zone of the Baltic Sea and, depending on row of factors, have different sizes, specifically characteristic for each region of the sea-coast. Observed climate changes are characterized with greater dynamics of weather phenomena. To compare the risk of storm surges to different areas, a new method had to be developed. Storm-surges indicator is used to compare the risks to the South Baltic water areas, varied along with conditions therein and the hydro meteorological and local conditions. The studies on the relations between the parameters and the occurrence of storm surges were carried out as well. The storm surges indicator “W” is related to the number of storm surges observed at the stations in the particular regions, the maximal wind velocity and the max sea level occurring during the same storm surges. The storm surges indicator was calculated for the period of 1955-2008 for the Polish coastal zone. The inten-tion is to use this indicator for research and forecasting purposes. Assessment of the tendencies and variability of the regional phenomena indicators in timescale prove occurrence of certain regional changes of hydrome-teorological conditions.

Low Sea Level Occurrence of the Southern Baltic Sea Coast

51%

Stanisławczyk I. , Kowalska B. , Mykita M.

tom Vol. 4, no. 2

199--204

The level of 440 cm is defined as the upper limit of low sea level. This value is also accepted as the warning level for navigation, according to the NAVTEX. The low sea levels along the southern Baltic Sea coast were analyzed in the years 1955 – 2005. Lowest values recorded ranged from 309 cm in Wismar to 370 cm in Kołobrzeg. The phenomenon was chiefly generated by hurricane like offshore winds. Extremely low levels were not frequent, their occurrence did not exceed more than 0,3% in Świnoujście and not more than 1% in Warnemünde. In summer months these phenomena occurred extremely seldom, they were more fre-quent in the western, than in the eastern part of the coast. Long-term variation and statistical analysis was pre-sented. Probability of low sea levels occurrence was calculated by Gumbel method and percentile distribution for 4 gauge stations was analyzed. The calculations revealed that, for instance, in Warnemünde once in 20 years the minimum sea level can be as low as 358 cm.