广西近海潮汐和海流的观测分析与数值研究——Ⅰ.观测与分析  

Observation, Analysis and Numerical Study of the Tide and Current in the Guangxi Offshore Area——Ⅰ. Observation and Analysis

作　　者：孙洪亮[1] 黄卫民[1] 

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》2001年第4期1-11,共11页Journal of Oceanography of Huanghai & Bohai Seas

基　　金：广西壮族自治区资助项目 ( 9734 )

摘　　要：1992 - 1 996年 ,对广西近海水深浅于 2 0 m的整个海域 ,利用 2 8个锚碇浮标和 2 3个周日连续观测站 ,对水位和海流进行了观测。根据观测结果 ,对该海域的潮汐性质 ,潮流特征和余流分布进行了分析 ,并对潮汐与潮流性质差异的动因和影响余流变化的主要因子进行初步探讨。结果表明 :广西近海的潮汐性质属于正规日潮。潮流性质大部分属于不正规半日潮或不正规日潮。余流主要由潮余流和风海流组成。潮流大小潮变化和风的变化是导致余流变化的主要原因。潮流绕海角运动 ,流速增强 。The water level and current in the Guangxi offshore area with a water depth less than 20 m from 1992 to 1996 were observed at 28 moored buoy stations and 23 diel consecutive observations in the area were analysed based on the observed results, and the dynamic cause for the difference between the tide and tidal current characteristies and the main factors affecting the residual current changes are preliminarily explored. It is shown from the analysis results that the tide in the Guangxi offshore area belongs to regalar diurnal tide, and the tidal current in the area mostly belongs to irregular semi-diurnal tide current or irregular diurnal tide current; the residual current is mainly eomposed of tidal residual and wind current, and the main causes for the changes in residual current are the changes in tidal current during spring and neap tides and the changes in wind. When the tidal current flows round a cap, the current speed is increased and a longitudinal offshore current can be induced.

关 键 词：广西近海 潮汐 海流 观测 数值研究 

分 类 号：P731.2[天文地球—海洋科学]