龙口湾大振幅假潮形成的数值模拟  

The Numerical Modelling of Seiches of Large Amplitude in Longkou Bay

作　　者：王钟桾 

机构地区：[1]国家海洋局第一海洋研究所,山东青岛266061

出　　处：《黄渤海海洋》2000年第3期7-13,共7页Journal of Oceanography of Huanghai & Bohai Seas

基　　金：国家自然科学基金资助项目!( 496762 81 );山东省科委计划专项合同!( 96第 4 0号 )

摘　　要：龙口湾是出现假潮比较显著的海湾之一。据统计 ,1 972～ 1 981年 ,平均每年出现 6次>40 cm的振动 ,其中 ,1 980年 9月 1日观测到水位振动的最大振幅达 2 93cm,同日的气压波也有 7h Pa的起伏。用数值模拟方法 ,初步探讨了气压扰动与 1 980年 9月 1日在龙口湾观测到的假潮之间的定量关系 ,证实 ,在龙口湾中出现的大振幅假潮的确是由于移动气压波扰动激起湾外长波传入湾内发生共振所引起的。Longkou Bay is one of the bays where the seiches occure frequently. Based on the statistics during 1972～1981, the seiche processes with an amplitude greater than 40cm occured six times a year on an average. On September 1, 1980, a seiche with a maximum amplitude of 293cm was observed,and a 7 hPa air pressure fluctuation was also observed on the same day. By using numerical modelling method the quantitative relationship between the seiche and the air pressure fluetuation in Longkou Bay on September 1, 1980 is studied. The results indicate that the ocean long wave caused by a moving air pressure fluctuation and travelling into the bay can cause seiches of large amplitude by resonance and it is unlikely for air pressure fluctuation to directly cause seiche of large amplitude in a bay.

关 键 词：大振幅假潮 数值模拟 龙口湾 潮汐 

分 类 号：P731.23[天文地球—海洋科学]