【摘要】：利用廣西近岸西部白龍半島海域2011—2012年連續(xù)一年的觀測資料和數(shù)值計算方法,研究了該海域潮流和余流的基本特征及變化規(guī)律,得出如下結(jié)論:白龍半島海域潮汐為正規(guī)全日潮,但是潮流為不規(guī)則半日潮流;旋轉(zhuǎn)譜分析顯示,潮流逆時針旋轉(zhuǎn)分量強于順時針旋轉(zhuǎn)分量,全日潮流的總能量小于半日潮流的能量;潮流振幅在夏季明顯高于冬季,這是因為夏季北部灣北部的顯著層結(jié)導(dǎo)致的較淺海域的內(nèi)潮同樣比較顯著,并且表現(xiàn)為由表層向底層加強;另外,本文首次發(fā)現(xiàn),經(jīng)過北部灣的臺風會增強主要的全日、半日分潮的能量,引起潮流的流速增加。通過數(shù)模試驗,第一次發(fā)現(xiàn)在白龍半島附近海域存在一個小尺度的反氣旋渦,范圍大約位于108°E~108.7°E、20.8°N~21.5°N,渦旋在秋季產(chǎn)生,可以一直持續(xù)到冬季結(jié)束。
[Abstract]:Based on the observation data and numerical calculation method of the Bailong Peninsula in the western part of Guangxi during 2011-2012, the basic characteristics and variation rules of tidal current and residual current in the sea area are studied. The following conclusions are drawn: the tide in the Bailong Peninsula is a normal all-day tide, but the tidal current is an irregular semi-diurnal tidal current, and the rotating spectrum analysis shows that the counterclockwise rotation component of the tidal current is stronger than the clockwise rotational component. The total energy of the whole day tidal current is smaller than that of the semi-diurnal tidal current, and the amplitude of the tidal current is obviously higher in summer than in winter, because the inner tide in the shallow sea area caused by the remarkable stratification in the northern part of Beibu Gulf in summer is also significant. In addition, it is found for the first time that the typhoon passing through Beibu Gulf will increase the energy of the main diurnal and half-day tide, which will increase the velocity of tidal current. By numerical simulation experiments, it is found for the first time that there is a small scale anti-gas vortex in the sea area near the Bailong Peninsula, with a range of about 108 擄E ~ (10. 7) 擄E ~ (10. 8) 擄E ~ (2 +) ~ (20. 8) 擄N ~ (2) ~ (2) 擄N ~ (1.5) 擄N ~ (21. 5).
【作者單位】： 中國海洋大學(xué)海洋與大氣學(xué)院;魯東大學(xué)土木工程學(xué)院;華東師范大學(xué)河口海岸學(xué)國家重點實驗室;國家海洋局第三海洋研究所;國家海洋局第一海洋研究所;
【基金】：國家自然科學(xué)基金項目(41266002,41406031,41406044) 中央級公益性科研院所基本科研業(yè)務(wù)費專項資金項目(2015P02)資助~~
【分類號】：P731.21
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本文編號：2152767