【摘要】：海洋條帶結(jié)構(gòu)是近來物理海洋學(xué)研究的一個(gè)熱點(diǎn)。在海洋中,條帶結(jié)構(gòu)往往被大尺度環(huán)流過程所掩蓋。把這種隱蔽的海水運(yùn)動(dòng)現(xiàn)象顯現(xiàn)出來的辦法是對(duì)時(shí)間平均的速度場(chǎng)進(jìn)行空間濾波。條帶結(jié)構(gòu)很可能是湍流有序性的一種表現(xiàn)形式,對(duì)其深入的研究有助于解決湍流這一世紀(jì)難題。而且海洋中的條帶結(jié)構(gòu)的有助于物質(zhì)和能量沿流動(dòng)方向的輸運(yùn),同時(shí)能夠抑制垂直于流動(dòng)方向的混合。因此對(duì)于海洋條帶結(jié)構(gòu)的研究有著不可忽視的意義。本文從獲取條帶結(jié)構(gòu)方法入手,揭示了條帶結(jié)構(gòu)在全球方法內(nèi)不同尺度下的分布特征,并就一些顯著特征進(jìn)行動(dòng)力學(xué)分析。主要結(jié)論如下:1.就揭示海洋條帶結(jié)構(gòu)的一維方法而言,本文新采用的切比雪夫?yàn)V波方法解決了現(xiàn)有方法的一些缺陷,更加適宜于獲取這種隱藏的運(yùn)動(dòng)。2.二維濾波方法更優(yōu)于一維方法,因?yàn)槠淇紤]的數(shù)據(jù)場(chǎng)兩個(gè)方向上的聯(lián)系,并且其最終結(jié)果不依賴于濾波窗口的選擇。濾波的參數(shù)并不唯一,它取決于所分析數(shù)據(jù)場(chǎng)的物理特征。3.條帶結(jié)構(gòu)廣泛存在于全球海洋中,無論是開闊的大洋還是孤立的海盆,但是兩者之間有著顯著差異。4.針對(duì)海洋條帶結(jié)構(gòu)在全球不同海域內(nèi)所表現(xiàn)出來的走向的多樣性問題,本文采用位渦理論證實(shí)了條帶結(jié)構(gòu)的走向取決于等位渦線的分布。
[Abstract]:The structure of ocean strip is a hot spot in the field of physical oceanography recently. In the ocean, strip structures are often masked by large-scale circulation processes. The method to show the hidden sea water motion is to filter the time-averaged velocity field in space. Strip structure is likely to be a form of turbulence orderliness, and its in-depth study is helpful to solve the problem of turbulence in the century. Moreover, the belt structure in the ocean is conducive to the transport of matter and energy along the flow direction and can restrain the mixing perpendicular to the flow direction. Therefore, the study of the ocean strip structure can not be ignored. Starting with the method of obtaining strip structure, this paper reveals the distribution characteristics of strip structure at different scales within the global method, and makes dynamic analysis on some notable characteristics. The main conclusions are as follows: 1. As far as the one-dimensional method to reveal the structure of the ocean strip is concerned, the new Chebyshev filtering method, which is adopted in this paper, solves some defects of the existing methods and is more suitable for obtaining the hidden motion. 2. The two-dimensional filtering method is better than the one-dimensional method because it considers the relationship between the two directions of the data field and the final result is independent of the filter window selection. Filter parameters are not unique, it depends on the physical characteristics of the data field analyzed. The banded structure is widely distributed in the global oceans, both in the open ocean and in the isolated basin, but there is a significant difference between the two. Aiming at the diversity of ocean stripe structure in different sea areas around the world, the potential vortex theory is used to prove that the direction of strip structure depends on the distribution of isotropic vortices.
【學(xué)位授予單位】：浙江海洋學(xué)院
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P731.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 HUANG Rui-xin;;Evolution of oceanic circulation theory: From gyres to eddies[J];熱帶海洋學(xué)報(bào);2013年02期

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本文編號(hào)：2192085