论文部分内容阅读
对渤海、黄海主要港湾发生的振幅大于 50cm(龙口港湾取振幅大于 80cm)的6 5次假潮过程与地面天气图进行对比分析 ,着重分析了伴随大振幅假潮过程的天气形势 .分析结果表明 :( 1 )龙口港湾 2 2次大振幅假潮中有 1 9次与雷暴天气 (其中有 3次伴随有飑线 ,1次还伴有龙卷 )有关 ,2次与大风天气有关 ,1次由外海雷暴引起 ;因此得出雷暴、飑线是引起大振幅假潮的主要原因 ;雷暴强弱和持续时间长短变化 ,导致假潮振幅大小及持续时间长短变化 ;雷暴的季节变化引起大振幅假潮的季节变化 ;雷暴发生的局地性导致假潮出现的局地性 ;雷暴传播方向的不同引起大振幅假潮的周期不同 .( 2 )北方气旋型和江淮气旋及西南倒槽型这两种天气类型有利于产生雷暴 ,并导致大振幅假潮的发生 .这两类型分别占 6 2个例的 46 8%和 1 7 7% .
The comparison of the 6 5 tidal wave amplitudes greater than 50 cm (the amplitudes greater than 80 cm in Longkou Harbor) occurring in the major bays of the Bohai Sea and the Yellow Sea with the ground weather maps focuses on analyzing the weather conditions accompanying the large-amplitude fake tide process. The analysis shows that (1) There were 29 times of 2 large-amplitude wave tides in Longkou Harbor, which were related to thunderstorm weather (3 of them were accompanied by tapholes and 1 was accompanied by tornadoes), 2 were related to windy weather and 1 Which is caused by thunderstorm outside the sea; therefore, thunderstorm and squall line are the main causes of large amplitude fake tide; the variation of thunderstorm intensity and duration causes the variation of amplitude and duration of fake tide; the seasonal variation of thunderstorm causes large-amplitude fake The seasonal variation of tide, the local nature of thunderstorm, and the periodicity of large amplitude and different tide caused by different thunderstorm propagation directions. (2) Both the north cyclone, the Jianghuai cyclone and the southwest inverted trough The weather patterns favored the generation of thunderstorms and led to the occurrence of large-amplitude clutter, accounting for 46.8% and 177% of 62 cases respectively.