SCSIO OpenIR  > 热带海洋环境国家重点实验室(LTO)
Characteristics of the surface mixed layer depths in the northern South China Sea in spring
Qiu, Chunhua; Cui, Yongsheng; Ren, Jie; Wang, Qiang; Huo, Dan; Wu, Jiaxue; Liu, Huan; Mao, Huabin; Wu, JX (reprint author), Sun Yat Sen Univ, Sch Marine Sci, Ctr Coastal Ocean Sci & Technol, 135 Xin Gang Xi Rd, Guangzhou 510275, Guangdong, Peoples R China.
2016
Source PublicationJOURNAL OF OCEANOGRAPHY
Volume72Issue:4Pages:567-576
AbstractThe nature and characteristics of the mixed layer depth (MLD) remain uncertain in the northern South China Sea. Using in situ data, we examined the quality of different MLD definitions, investigated the spatial and diurnal variation in the MLD, and examined the mechanisms of mixed layer development during March 23-31, 2014. We made distinct calculations of the MLD; of which two are (a) the depths between two different temperatures (0.2, 0.6 A degrees C) and (b) the depths between two density differences (0.125, 0.25 kg/m(3)); and the fifth calculation is a depth derived from the optimal linear fitness method. We found that the optimal linear fitness MLD was the best definition for our study region ,and that it deepened from the shelf to the slope. Twenty-four-hour diurnal variation in the MLDs and mixing layers was observed when the ship was moored. Mixing layers were characterized by turbulent dissipation rates. We found that the mixed layer underwent a 'stable-decaying-developing' process. During the stable period, the MLD was close to that of the mixing layer, but during the decay/development periods, the MLDs were larger/smaller than those of the mixing layers. We suggest that both velocity shear and buoyancy flux were important in mixed layer development. We quantitatively examined the mechanisms of mixing in the shelf region, with air-sea net heat flux determined to be the major factor, rather than wind speed or current velocity.
Department[Qiu, Chunhua; Cui, Yongsheng; Ren, Jie; Huo, Dan; Wu, Jiaxue; Liu, Huan] Sun Yat Sen Univ, Sch Marine Sci, Ctr Coastal Ocean Sci & Technol, 135 Xin Gang Xi Rd, Guangzhou 510275, Guangdong, Peoples R China; [Qiu, Chunhua] Sun Yat Sen Univ, Sch Marine Sci, Guangdong Prov Key Lab Marine Resources & Coastal, Guangzhou 510275, Guangdong, Peoples R China; [Wang, Qiang; Mao, Huabin] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China ; LTO
KeywordMixed Layer Mixing Layer Diurnal Variation Heat Flux South China Sea
Subject AreaOceanography
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/15344
Collection热带海洋环境国家重点实验室(LTO)
Corresponding AuthorWu, JX (reprint author), Sun Yat Sen Univ, Sch Marine Sci, Ctr Coastal Ocean Sci & Technol, 135 Xin Gang Xi Rd, Guangzhou 510275, Guangdong, Peoples R China.
Recommended Citation
GB/T 7714
Qiu, Chunhua,Cui, Yongsheng,Ren, Jie,et al. Characteristics of the surface mixed layer depths in the northern South China Sea in spring[J]. JOURNAL OF OCEANOGRAPHY,2016,72(4):567-576.
APA Qiu, Chunhua.,Cui, Yongsheng.,Ren, Jie.,Wang, Qiang.,Huo, Dan.,...&Wu, JX .(2016).Characteristics of the surface mixed layer depths in the northern South China Sea in spring.JOURNAL OF OCEANOGRAPHY,72(4),567-576.
MLA Qiu, Chunhua,et al."Characteristics of the surface mixed layer depths in the northern South China Sea in spring".JOURNAL OF OCEANOGRAPHY 72.4(2016):567-576.
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