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    Regulation of South China Sea throughflow by pressure difference

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    Qin_et_al-2016-Journal_of_Geophysical_Research__Oceans.pdf (4.528Mb)
    Date
    2016-06-12
    Author
    Qin, Huiling  Concept link
    Huang, Rui Xin  Concept link
    Wang, Weiqiang  Concept link
    Xue, Huijie  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/8481
    As published
    https://doi.org/10.1002/2015JC011177
    Keyword
     South China Sea throughflow; Pressure difference; Dynamic height; Thermal term; Haline term 
    Abstract
    Sea Surface Height (SSH) data from the European Centre for Medium-Range Weather Forecasts-Ocean Reanalysis System 4 (ECMWF-ORAS4) are used to determine the pressure difference in connection with variability of the South China Sea ThroughFlow (SCSTF) from 1958 to 2007. Two branches of SCSTF, the Karimata-Sunda Strait ThroughFlow (KSSTF) and the Mindoro Strait ThroughFlow (MSTF), are examined. Using the ensemble empirical mode decomposition method (EEMD), time series of pressure difference and volume transport are decomposed into intrinsic mode functions and trend functions, with the corresponding variability on different time scales. Pressure difference agrees with the KSSTF volume transport on decadal time scale; while for the MSTF, pressure difference varies similarly with volume transport on interannual time scale. Separating the dynamic height difference into the thermal and haline terms, for the KSSTF more than half of the dynamic height difference (32 cm) is due to the thermal contributions; while the remaining dynamic height difference (23 cm) is due to the haline contributions. For the MSTF, the dynamic height difference (29 cm) is primarily due to the thermal contribution (26 cm).
    Description
    Author Posting. © American Geophysical Union, 2016. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Oceans 121 (2016): 4077–4096, doi:10.1002/2015JC011177.
    Collections
    • Physical Oceanography (PO)
    Suggested Citation
    Journal of Geophysical Research: Oceans 121 (2016): 4077–4096
     

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