Discussion/comments regarding “Distribution and sea-air fluxes of biogenic gases and relationships with phytoplankton and nutrients in the central basin of the South China Sea during summer” by X. Zhai, H.-H. Zhang, G.-P. Yang, J.-L. Li, D. Yuan

2018 ◽  
Vol 205 ◽  
pp. 98-99
Author(s):  
Dag Myrhaug
2016 ◽  
Vol 688 ◽  
pp. 1-10 ◽  
Author(s):  
Aiguo Ruan ◽  
Xiaodong Wei ◽  
Xiongwei Niu ◽  
Jie Zhang ◽  
Chongzhi Dong ◽  
...  

Author(s):  
Yuan-Zheng Lu ◽  
Xian-Rong Cen ◽  
Shuang-Xi Guo ◽  
Ling Qu ◽  
Peng-Qi Huang ◽  
...  

AbstractThe nominal spatial distribution of diapycnal mixing in the South China Sea (SCS) is obtained with Thorpe-scale analysis from 2004 to 2020. The inferred dissipation rate ε and diapycnal diffusivity Kz between 100 and 1500 m indicated that the strongest mixing occurred in the Luzon Strait and Dongsha Plateau regions, with ε ~ 3.0 × 10-8 W/kg (εmax = 5.3 × 10-6 W/kg) and Kz ~ 3.5 × 10-4 m2/s (Kz max = 4.2 = 10-2 m2/s). The weakest mixing occurred in the thermocline of the central basin, with ε ~ 6.2 × 10-10 W/kg and Kz ~ 3.7 × 10-6 m2/s. The ε and Kz in the continental slope indicated that the mixing in the northern part [O(10-8) W/kg, O(10-4) m2/s] was comparatively stronger than that in the Xisha and Nansha regions [O(10-9) W/kg, O(10-5) m2/s]. The Kz in the continental slope region (200–2000 m) decayed at a closed rate from the ocean bottom to the main thermocline when the measured depth D was normalized by the ocean depth H as D/H, whether in the shallow or deep oceans. The diapycnal diffusivity was parameterized as Kz = 3.3 × 10−4 (1 + )−2 − 6.0 × 10−6 m2/s. The vertically integrated energy dissipation was nominally as 15.8 mW/m2 for all data and 25.6 mW/m2 for data at stations H < 2000 m. This was about one order higher than that in the open oceans (3.0–3.3 mW/m2), which confirmed the active mixing state in the SCS.


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