【摘要】：基于HYCOM(HYbrid Coordinate Ocean Model)海洋模式,采用全球到西北太平洋,西北太平洋到南海兩層嵌套的數(shù)值模擬方法,以2013年為例,獲得了高精度(1/25°×1/25°×cosθ)的南海海洋動(dòng)力數(shù)據(jù)資料。詳細(xì)刻畫了呂宋暖渦的演變過程及三維結(jié)構(gòu),并對(duì)呂宋暖渦演化過程中伴隨的能量變化進(jìn)行了分析。研究發(fā)現(xiàn),2013年6月中旬呂宋暖渦生成于呂宋島西北側(cè),該渦先向西移動(dòng),8月底滯留約一個(gè)月,隨后沿200 m等深線向西南移動(dòng),最終于12月中旬消亡。以2013年8月4日為例,呂宋暖渦的影響深度可從海表面到達(dá)海底,渦的形狀類似于圓柱狀,渦中心存在傾斜,從海表面至海底渦的中心可傾斜約110 km;呂宋暖渦最大流速可達(dá)0.5 m/s。呂宋暖渦所在區(qū)域的溫度高于周圍區(qū)域2~6℃,鹽度低于周圍區(qū)域約0.1~0.3‰,最大溫度異常值為6.5℃,鹽度異常值可達(dá)-1‰,都出現(xiàn)在深度150 m左右的海域。呂宋暖渦的總能量可達(dá)左右,渦勢(shì)能約是渦動(dòng)能的6倍;正壓能量轉(zhuǎn)化與斜壓能量轉(zhuǎn)化之和占渦總能量變化的76%,對(duì)渦能量變化起決定性作用。
[Abstract]:Based on the HYCOM (HYbrid Coordinate Ocean Model) ocean model, a numerical simulation method of two layers nesting from the global to the northwest Pacific and from the northwest Pacific to the South China Sea is used. Taking 2013 as an example, the high-precision (1 / 25 擄脳 1 / 25 擄脳 25 擄脳 cos 胃) ocean dynamic data of the South China Sea are obtained. The evolution process and three-dimensional structure of Luzon warm vortex are described in detail, and the energy changes associated with the evolution of Luzon warm vortex are analyzed. It is found that the warm vortex of Luzon occurred in the northwest of Luzon Island in the middle of June, 2013. The vortex moved westward first, stayed for about a month at the end of August, then moved southwestward along the 200 m isobath, and finally died out in the middle of December. For example, on August 4, 2013, the influence depth of Luzon warm vortex can reach the bottom from the sea surface. The shape of the vortex is similar to that of a cylinder. The vortex center is inclined, and from the sea surface to the center of the sea vortex, it can be tilted about 110 km;. The maximum velocity of Luzon warm vortex can reach 0.5 m / s. The temperature in the region of Luzon warm vortex is higher than that in the surrounding area by 2 ~ 6 鈩，

本文編號(hào)：2376519