On the dynamics of the South China Sea deep circulation

被引:99
作者
Lan, Jian [1 ,2 ]
Zhang, Ningning [1 ,2 ]
Wang, Yu [1 ,2 ]
机构
[1] Ocean Univ China, Phys Oceanog Lab, Qingdao 266100, Peoples R China
[2] Ocean Univ China, Dept Oceanog, Qingdao 266100, Peoples R China
基金
中国国家自然科学基金;
关键词
POTENTIAL VORTICITY; OCEAN CIRCULATION; UPPER-LAYER; MODEL; WATER;
D O I
10.1002/jgrc.20104
中图分类号
P7 [海洋学];
学科分类号
0707 ;
摘要
In the South China Sea (SCS), the deep water is confined to a bowel-type trench, and the maximum depth is approximately 4700 m. The Luzon Strait is the only deep connection between the SCS and the Pacific Ocean, with the deepest sill at about 2400 m in the Bashi Channel. Using the Hybrid Coordinate Ocean Model, this study gives a good description of the SCS deep circulation. The most obvious features are basin-scale cyclonic gyre and western intensification. The gyre is elliptical shaped, and its major axis is northeast-southwest. A numerical experiment is designed to investigate what could be possibly responsible for the SCS deep circulation. The results reveal that the deepwater overflow through the Luzon Strait controls over the basin-scale circulation structure in the deep SCS basin. The driving mechanism is elucidated based on the potential vorticity (PV) integral constraint, which means the PV inflow across the boundary is balanced by the net PV dissipation along the boundary.
引用
收藏
页码:1206 / 1210
页数:5
相关论文
共 33 条
  • [1] An oceanic general circulation model framed in hybrid isopycnic-Cartesian coordinates
    Bleck, Rainer
    [J]. OCEAN MODELLING, 2002, 4 (01) : 55 - 88
  • [2] HYDROGRAPHY, CHEMISTRY, AND RADIOISOTOPES IN THE SOUTHEAST-ASIAN BASINS
    BROECKER, WS
    PATZERT, WC
    TOGGWEILER, JR
    STUIVER, M
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 1986, 91 (C12): : 14345 - 14354
  • [3] Chu PC, 2000, J PHYS OCEANOGR, V30, P2419, DOI 10.1175/1520-0485(2000)030<2419:SCSISC>2.0.CO
  • [4] 2
  • [5] Chu PC, 1999, J PHYS OCEANOGR, V29, P2971, DOI 10.1175/1520-0485(1999)029<2971:DMFTSC>2.0.CO
  • [6] 2
  • [7] Interocean circulation and heat and freshwater budgets of the South China Sea based on a numerical model
    Fang, Guohong
    Wang, Yonggang
    Wei, Zexun
    Fang, Yue
    Qiao, Fangli
    Hu, Xiaomin
    [J]. DYNAMICS OF ATMOSPHERES AND OCEANS, 2009, 47 (1-3) : 55 - 72
  • [8] On the sedimentological origin of down-core variations of bulk sedimentary nitrogen isotope ratios
    Kienast, M
    Higginson, MJ
    Mollenhauer, G
    Eglinton, TI
    Chen, MT
    Calvert, SE
    [J]. PALEOCEANOGRAPHY, 2005, 20 (02): : 1 - 13
  • [9] Large WG, 1997, J PHYS OCEANOGR, V27, P2418, DOI 10.1175/1520-0485(1997)027<2418:STSFAB>2.0.CO
  • [10] 2