CAJ | 학술논문

通过对2010年5月南海16°N 和14．5°N 断面的湍流微结构剖面观测资料分析，给出了南海海盆上层湍流混合空间分布特征：在16°N 断面上，上层10～400 m 垂向平均湍动能耗散率＜ερ＞在东侧略大于西侧；相反，在14．5°N 断面上，西侧＜ερ＞均值约是东侧＜ερ＞的4倍，其中，西侧110．5°～111° E 的＜ερ＞的平均值为2．6×10－6 W／m3，东侧118．5°E 的＜ερ＞仅为5．89×10－7 W／m3。通过分析细结构剪切和湍流混合的相关性，发现剪切是南海中部上层强湍流混合的主要驱动力，揭示了高模态内波破碎可能是湍流混合的主要机制。另外，研究了大洋中的3种参数化模型，发现适用于大洋近海的参数化 MacKinnon-Gregg（MG）模型能较好地用浮频和剪切估算南海中部深海区上层湍流耗散率。
통과대2010년5월남해16°N 화14．5°N 단면적단류미결구부면관측자료분석，급출료남해해분상층단류혼합공간분포특정：재16°N 단면상，상층10～400 m 수향평균단동능모산솔＜ερ＞재동측략대우서측；상반，재14．5°N 단면상，서측＜ερ＞균치약시동측＜ερ＞적4배，기중，서측110．5°～111° E 적＜ερ＞적평균치위2．6×10－6 W／m3，동측118．5°E 적＜ερ＞부위5．89×10－7 W／m3。통과분석세결구전절화단류혼합적상관성，발현전절시남해중부상층강단류혼합적주요구동력，게시료고모태내파파쇄가능시단류혼합적주요궤제。령외，연구료대양중적3충삼수화모형，발현괄용우대양근해적삼수화 MacKinnon-Gregg（MG）모형능교호지용부빈화전절고산남해중부심해구상층단류모산솔。
Turbulent microstructure data in sections of 16°N and 14.5°N in May 2010 has been analyzed.The spatial variation of upper turbulent mixing in central South China Sea is investigated.The results show that,in the upper 10 to 400 m layer of 16°N section,the averaged vertical dissipation rate of turbulent kinetic energy <ερ> in the eastern sites is slightly stronger than that in the western sites.On the contrary,in 14.5°N section,it is found that<ερ> in western sites is 4 times of eastern sites;<ερ> declines from a averaged value of 2.6×10-6 W/m3 in the western sites (110.5°E to 111°E)to 5.89×10-7 W/m3 in the eastern sites (118.5°E).It is found that strong fine structure current shear and <ερ> are well correlated,which suggests that the strong current shear may be the main driving force for the strong turbulent mixing.Further study has revealed that the internal wave breaking of higher mode may be the main mechanism of turbulent mixing.In addition,three kinds of parameterization models are examined.MacKinnon-Gregg (MG)model for coastal sea is preferable because that the model could estimate turbulence dissipation rate of the upper layer of the central South China Sea with buoyancy frequency and shear.