本文選題：大亞灣 + 潮波系統(tǒng)　； 參考：I.潮波系統(tǒng)的觀測(cè)分析與數(shù)值模擬

【摘要】：文章作為大亞灣潮汐動(dòng)力學(xué)系列研究的第一部分,展現(xiàn)了大亞灣水動(dòng)力的最新觀測(cè)結(jié)果,并借助于不規(guī)則三角網(wǎng)格海洋模式建立了高時(shí)空分辨率的三維潮汐潮流數(shù)值模型,重現(xiàn)大亞灣潮位和潮流變化狀況。結(jié)合實(shí)測(cè)資料與模擬結(jié)果,得到了較以往更為精細(xì)的大亞灣潮波系統(tǒng)特征。淺水分潮,尤其是六分之一日分潮在大亞灣內(nèi)快速增長(zhǎng),成為大亞灣潮波系統(tǒng)的顯著特征。在大亞灣范和港M_6分潮振幅達(dá)到與M_4、S_2分潮相同的量級(jí)。大亞灣外開闊海域的潮流以旋轉(zhuǎn)流為主,但進(jìn)入灣內(nèi)后潮流橢圓迅速扁平化,往復(fù)流占據(jù)主導(dǎo)。在灣內(nèi)主要潮流通道內(nèi),M_6潮流橢圓主軸流速超過了M_4和K_1分潮。潮能通量分析揭示了大亞灣內(nèi)高頻分潮的強(qiáng)耗散,M_6分潮的能量耗散率和半日周期內(nèi)耗散的總能量均超過了M_4、M_2和K_1分潮。觀測(cè)到的歐拉余流表現(xiàn)出其灣內(nèi)不一致的大小潮變化以及灣外所受沿岸流的影響。模擬出的歐拉余流則揭示了大亞灣內(nèi)的余流多渦旋結(jié)構(gòu)和水體弱交換能力。
[Abstract]:As the first part of the series of tidal dynamics in Daya Bay, this paper presents the latest observational results of hydrodynamics in Daya Bay, and establishes a three-dimensional tidal current numerical model with high spatial and temporal resolution by means of irregular triangular grid ocean model. The tidal level and tidal current changes in Daya Bay are repeated. Combined with the measured data and simulation results, the characteristics of Daya Bay tidal wave system are obtained. Shallow water tide, especially one-sixth tide, increases rapidly in Daya Bay, which is a remarkable feature of tidal wave system in Daya Bay. In Daya Bay, the amplitude of M _ S _ 6 is of the same order of magnitude as that of M _ s _ 4 / S _ 2. The main tidal current in the open sea area outside Daya Bay is the rotational current, but the tidal current ellipse becomes flat quickly after entering the bay, and the reciprocating current dominates. In the main tidal current channel in the Bay, the current velocity of the main axis of M _ S _ 6 is higher than that of M _ S _ 4 and K _ S _ 1. The analysis of tidal energy flux reveals that the energy dissipation rate of M6 tide and the total energy dissipation in half-day period of M6 tide in Daya Bay are higher than those of M4M2 and K-1 tide in Daya Bay. The observed Euler residual currents show inconsistent tidal variations in the bay and the effects of the coastal currents outside the bay. The simulated Euler residual current reveals the multi-vortex structure and weak water exchange capacity of the residual flow in Daya Bay.
【作者單位】： 中國(guó)海洋大學(xué)海洋與大氣學(xué)院;中國(guó)海洋大學(xué)物理海洋教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(2015CB452905) 中國(guó)博士后科學(xué)基金第8批特別資助(2015T80742)~~
【分類號(hào)】：P731.23

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本文編號(hào)：1928147