期刊
ACTA OCEANOLOGICA SINICA
卷 31, 期 6, 页码 19-31出版社
SPRINGER
DOI: 10.1007/s13131-012-0250-8
关键词
mixed layer; multiple linear regression; South China Sea; vertical mixing model
类别
资金
- National Natural Science Foundation of China [11174235]
- Science and Technology Development Project of Shaanxi Province of China [2010KJXX-02]
- Program for New Century Excellent Talents in University of China [NCET-08-0455]
- Science and Technology Innovation Foundation of Northwestern Polytechnical University of China
- Doctorate Foundation of Northwestern Polytechnical University of China [CX201226]
Multiple linear regression (MLR) method was applied to quantify the effects of the net heat flux (NHF), the net freshwater flux (NFF) and the wind stress on the mixed layer depth (MLD) of the South China Sea (SCS) based on the simple ocean data assimilation (SODA) dataset. The spatio-temporal distributions of the MLD, the buoyancy flux (combining the NHF and the NFF) and the wind stress of the SCS were presented. Then using an oceanic vertical mixing model, the MLD after a certain time under the same initial conditions but various pairs of boundary conditions (the three factors) was simulated. Applying the MLR method to the results, regression equations which modeling the relationship between the simulated MLD and the three factors were calculated. The equations indicate that when the NHF was negative, it was the primary driver of the mixed layer deepening; and when the NHF was positive, the wind stress played a more important role than that of the NHF while the NFF had the least effect. When the NHF was positive, the relative quantitative effects of the wind stress, the NHF, and the NFF were about 10, 6 and 2. The above conclusions were applied to explaining the spatio-temporal distributions of the MLD in the SCS and thus proved to be valid.
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