Spatial distribution of turbulent diapycnal mixing along the Mindanao current inferred from rapid-sampling Argo floats
Spatial distribution of turbulent diapycnal mixing along the Mindanao current inferred from rapid-sampling Argo floats
复制标题
根据 Argo 浮标快速采样推断棉兰老岛洋流湍流二重混合的空间分布
DOI：
10.1007/s10872-021-00624-3
复制
发表时间：
2022-01
影响因子：
2.3
通讯作者：
Hibiya Toshiyuki
中科院分区：
文献类型：
--
作者：
He Ying;Wang Jianing;Wang Fan;Hibiya Toshiyuki
棉兰老海流（MC）通过向印度尼西亚海流提供北太平洋沃茨，连接着北太平洋低纬度西边界海流系统区和印度尼西亚海。虽然先前的研究推测，在网格气候数据集的水团分析的基础上，沿沿着MC的穿层混合可能是强大的，穿层混合的真实的空间分布沿着MC仍然有待澄清。我们在这里解决这个问题，通过应用细尺度参数化的温度和盐度配置文件使用两个快速采样剖面阿尔戈浮子漂移沿着MC。靠近棉兰老岛和桑吉河海峡的西部边界（WB）区域是沿MC的两个混合热点，沿着，能量耗散率ε和透壁扩散系数Kρ分别增加到~ 10-6 W kg−1和~ 10-3 m2 s−1。除上述两个混合热点外，大部分沿沿着MC的湍流混合都很弱，ε和Kρ分别为10-11-10-9 W kg−1和10-6-10-5 m2 s−1。在桑吉河海峡的强混合可以基本上归因于内潮的存在，而在WB区域的强混合表明存在内背风波。我们还发现，水团的转换沿着MC主要发生在桑吉河海峡的水团受到强烈的湍流混合在一个较长的停留时间。
The Mindanao Current (MC) bridges the North Pacific low-latitude western boundary current system region and the Indonesian Seas by supplying the North Pacific waters to the Indonesian Throughflow. Although the previous study speculated that the diapycnal mixing along the MC might be strong on the basis of the water mass analysis of the gridded climatologic dataset, the real spatial distribution of diapycnal mixing along the MC has remained to be clarified. We tackle this question here by applying a finescale parameterization to temperature and salinity profiles obtained using two rapid-sampling profiling Argo floats that drifted along the MC. The western boundary (WB) region close to the Mindanao Islands and the Sangihe Strait are the two mixing hotspots along the MC, with energy dissipation rate ε and diapycnal diffusivity Kρ enhanced up to ~ 10–6 W kg−1 and ~ 10–3 m2 s−1, respectively. Except for the above two mixing hotspots, the turbulent mixing along the MC is mostly weak, with ε and Kρ to be 10–11–10–9 W kg−1 and 10–6–10–5 m2 s−1, respectively. Strong mixing in the Sangihe Strait can be basically attributed to the existence of internal tides, whereas strong mixing in the WB region suggests the existence of internal lee waves. We also find that water mass transformation along the MC mainly occurs in the Sangihe Strait where the water masses are subjected to strong turbulent mixing during a long residence time.
登录
查看更多内容
用于改进热带太平洋海洋模拟的 Argo 背景扩散率参数化
影响因子：
5.2
作者：
Zhu Yuchao;Zhang Rong-Hua
通讯作者：
Zhang Rong-Hua
影响因子：
2.2
作者：
Hai-Tien Lee;R. Ellingson
通讯作者：
Hai-Tien Lee;R. Ellingson
影响因子：
3.5
作者：
C. Whalen;J. MacKinnon;L. Talley;A. Waterhouse
通讯作者：
C. Whalen;J. MacKinnon;L. Talley;A. Waterhouse
影响因子：
2.3
作者：
Yuanlong Li;Fan Wang
通讯作者：
Yuanlong Li;Fan Wang
影响因子：
5.2
作者：
Koch-Larrouy, Ariane;Madec, Gurvan;Molcard, Robert
通讯作者：
Molcard, Robert