Variations in extreme wave heights and wave directions in the north-eastern Baltic Sea
Variations in extreme wave heights and wave directions in the north-eastern Baltic Sea
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DOI：
10.3176/proc.2010.2.18
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
Andrus Räämet;T. Soomere;I. Zaitseva-Pärnaste
中科院分区：
文献类型：
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作者：
Andrus Räämet;T. Soomere;I. Zaitseva-Pärnaste
从波罗的海东北海岸和芬兰湾南部海岸的可见波观测和整个波罗的海的数值后报波特性被用于识别极端风暴中的波高和周期组合以及极端波高和波传播方向的长期变化。波罗的海北方的极端波高和周期分别为7 m和10-12 s，芬兰湾入口处的极端波高和周期分别为6 m和8-11 s，芬兰湾东部的极端波高和周期分别为4 m和6-8 s。波高的95%-ile和99%-ile在统计上没有显着的趋势。从20世纪80年代起，在纳尔瓦-Jesuu观测到的波浪方向分布的显著变化在后报中没有体现。
Visual wave observations from the north-eastern coast of the Baltic Proper and from the southern coast of the Gulf of Finland and numerically hindcast wave properties for the entire Baltic Sea were used for the identification of combinations of wave heights and periods in extreme storms and long-term changes in extreme wave heights and wave propagation directions. The extreme wave heights and periods are about 7 m and 10–12 s in the northern Baltic Proper, about 6 m and 8–11 s at the entrance to the Gulf of Finland, and about 4 m and 6–8 s in the eastern part of this gulf. Wave hindcasts show no statistically significant trends in the 95%-iles and 99%-iles of the wave heights. Significant observed changes in the directional distribution of waves at Narva-Jõesuu from the 1980s are not represented in hindcasts.