Microstructure measurements in the mid-depth waters of the North Pacific
Microstructure measurements in the mid-depth waters of the North Pacific
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DOI：
10.1029/2006gl028695
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发表时间：
2007-03-13
影响因子：
5.2
通讯作者：
Takagi, Shogo
中科院分区：
文献类型：
--
作者：
Nagasawa, Maki;Hibiya, Toshiyuki;Takagi, Shogo
微结构测量是在北太平洋内陆的28个地点进行的，从表面到最大深度约2000米。在阿留申海脊、夏威夷海脊和伊豆-小川海脊等半日内潮汐的重要产生区，特别注意了赤道扩散系数K(Rho)。在阿留申海脊附近测得的剖面中，只发现了几个epsilon>；=10(-9)wkg(-1)的湍流斑块，K(Rho)一般小于10(-5)m(2)S(-1)。在夏威夷海脊附近的剖面上，虽然K(Rho)一般在10(-5)m(2)S(-1)量级，但观察到了许多epsilon>；=10(-9)wkg(-1)的湍流斑块。相反，在与伊豆-小川海脊平行的伊豆-小川海槽，整个观测水深普遍存在明显的强烈湍流混合(epsilon>；=10(-8)wkg(-1)，K(Rho)=10(-4)，类似于10(-3)m(2)S(-1))。
Microstructure measurements from the surface down to maximum depths of similar to 2000 m were carried out at 28 locations in the interior of the North Pacific. Special attention was directed to the diapycnal diffusivities K(rho) in the significant generation regions of the semidiurnal internal tide such as the Aleutian Ridge, the Hawaiian Ridge, and the Izu-Ogasawara Ridge. In the profiles obtained near the Aleutian Ridge, only a few turbulent patches with epsilon >= 10(-9) Wkg(-1) were detected and K(rho) was generally less than 10(-5) m(2)s(-1). In the profiles obtained near the Hawaiian Ridge, many turbulent patches with epsilon >= 10(-9) Wkg(-1) were observed, although K(rho) was generally of the order of 10(-5) m(2)s(-1). Along the Izu-Ogasawara Trough running in parallel with the Izu-Ogasawara Ridge, in contrast, remarkably intense turbulent mixing (epsilon >= 10(-8) Wkg(-1), K(rho) = 10(-4) similar to 10(-3) m(2)s(-1)) was common throughout the observed water depth.