Global mapping of diapycnal mixing rates in the deep ocean for accurate modeling of the oceanic general circulation

深海二重混合率的全球绘图，用于精确模拟海洋环流

• 批准号: 09640520
• 负责人: HIBIYA Toshiyuki
• 金额: $ 1.54万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09640520/
• 关键词: internal wave spectrum; energy cascade; nonlinear wave interactions; diapycnal diffusivity; ocean general circulation model; parameterization; near-inertial internal waves; midlatitude storms; 内部波スペクトル; 非線形干渉; 乱波拡散; 近慣性流; 倍慣性周波数; 中・深層

By using three-dimensional numerical models, the distribution of internal wave energy for diapycnalmixing in the deep waters of the North Pacific has been examined. During winter, energetic near-inertial waves are excited in response to the midlatitude storms in the western-central North Pacific (30ﾟN-45ﾟN). Thus excited waves propagate southward down to 10ﾟN-15ﾟN where the frequencies become double the local inertial frequencies so that large amount of wave energy cascades down to dissipation scales via Parametric Subharmonic Instability mechanism. The low-vertical-wavenumber double-inertial frequency internal waves are, in contrast, very weak at the times and locations of the previous microscale measurements so that the observed diapycnal diffusivity of-0.1 cm^2s^<-1> might not be representative.

通过使用三维数值模型，已经检查了内波能在北太平洋深水中进行二比杂交的分布。在冬季，响应西北太平洋的中纬度风暴（30 ﾟN-45 n）的中纬度风暴而激发了能量的近惯性波。激发波向南传播至10 n-n-15 n，其中频率成为局部惯性频率的两倍，因此大量的波能通过参数亚谐波谐波不稳定机制向下降低到耗散量表。相反，在先前的微观测量的时间和位置相比，低垂直波的双惯性频率内波非常弱，因此观察到的Diapyn难度为-0.1 cm^2s^<-1>可能不是代表性的。

项目成果

Hibiya,T.,M.Ogasawara and Y.Niwa: "A numerical study of the fortnightly modulation of basin-ocean water axchange across a tidal mixiting zone" Journal of Physical Oceanography. 28・6. 1224-1235 (1998)

Hibiya, T., M. Ogasawara 和 Y. Niwa：“潮汐混合区盆地-海洋水轴变化的数值研究”物理海洋学杂志 28・6 (1998)。

Hibiya, T., M.Ogasawara and Y.Niwa: "A numerical study of the fortnightly modulation of basin-ocean water exchange across a tidal mixing zone" Journal of Physical Oceanography. 28・6. 1224-1235 (1998)

Hibiya, T., M.Ogasawara 和 Y.Niwa：“潮汐混合区盆地-海洋水交换的每两周调节的数值研究”物理海洋学杂志 28・6 (1998)。

Matsuno T., S.Yanao, S.Kanari, T.Hibiya, and C.Kobayashi: "Vertical mixing near the continental shelf break in the East China Sea and intrusion of shelf water into the Kuroshio" Proceedings of the JSPS-VCC Joint Seminar on Marine Science, ed.by Mohd.Zaki

Matsuno T.、S.Yanao、S.Kanari、T.Hibiya 和 C.Kobayashi：“东海大陆架断裂附近的垂直混合和陆架水侵入黑潮” JSPS-VCC 联合论文集

Hibiya,T., M.Ogasawara, and Y.Niwq: "A Numerical Study of the Fortnightly Modulation of Basin-Ocean Water Exchange Across a Tidal Mixing Zone" Journal of Physical Oceanography. 28・4. in press (1998)

Hibiya, T., M.Ogasawara, 和 Y.Niwq：“潮汐混合区盆地-海洋水交换的每两周调节的数值研究”物理海洋学杂志 28・4。

Matsuno T.,S.Yanao,S.Kanari,T.Hibiya,and C.Kobayashi: "Proceedings of the JSPS-VCC Joint Seminar on Marine Science,ed.by Mohd.Zaki Mohd.Said,Univ.Pertanian Malaysia,Malaysia" Vertical mixing near the continental shelf break in the East China Sea and intru

Matsuno T.、S.Yanao、S.Kanari、T.Hibiya 和 C.Kobayashi：《JSPS-VCC 海洋科学联合研讨会论文集》，作者：Mohd.Zaki Mohd.Said，马来西亚 Pertanian 大学，马来西亚