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Observations of the Karimata Strait througflow from December 2007 to November 2008

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Abstract

In order to quantitatively estimate the volume and property transports between the South China Sea and Indonesian Seas via the Karimata Strait, two trawl-resistant bottom mounts, with ADCPs embedded, were deployed in the strait to measure the velocity profile as part of the South China Sea-Indonesian Seas transport/exchange (SITE) program. A pair of surface and bottom acoustic modems was employed to transfer the measured velocity without recovering the mooring. The advantage and problems of the instruments in this field work are reported and discussed. The field observations confirm the existence of the South China Sea branch of Indonesian throughflow via the Karimata Strait with a stronger southward flow in boreal winter and weaker southward bottom flow in boreal summer, beneath the upper layer northward (reversal) flow. The estimate of the averaged volume, heat and freshwater transports from December 2007 to March 2008 (winter) is (−2.7±1.1)×106 m3/s, (−0.30±0.11) PW, (−0.18±0.07)×106 m3/s and from May to September 2008 (summer) is (1.2±0.6)×106 m3/s, (0.14±0.03) PW, (0.12±0.04)×106 m3/s and for the entire record from December 2007 to October 2008 is (−0.5±1.9)×106 m3/s, (−0.05±0.22) PW, (−0.01±0.15)×106 m3/s (negative/positive represents southward/northward transport), respectively. The existence of southward bottom flow in boreal summer implies that the downward sea surface slope from north to south as found by Fang et al. (2010) for winter is a year-round phenomenon.

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Authors and Affiliations

  1. Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, 10964, USA

    R. Dwi Susanto

  2. First Institute of Oceanography, State Oceanic Administration, Qingdao, 266061, China

    Zexun Wei, Bin Fan, Shujiang Li & Guohong Fang

  3. Agency for Marine and Fisheries Research and Development, Jakarta, 14430, Indonesia

    Rameyo T. Adi

Authors
  1. R. Dwi Susanto
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  2. Zexun Wei
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  3. Rameyo T. Adi
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  4. Bin Fan
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  5. Shujiang Li
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  6. Guohong Fang
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Corresponding author

Correspondence to R. Dwi Susanto.

Additional information

Foundation item: The National Science Foundation of the United States under contract No. OCE-07-25935; the Office of Naval Research of the United States under contract No. N00014-08-1-0618 (for US LDEO); the National Basic Research Program under contract No. 2011CB403502; the International Cooperation Program of China under contract No. 2010DFB23580; the International Cooperation Program of State Oceanic Administration of China under contract No. QY0213022; the First Institute of Oceanography, the State Oceanic Administration of China under contract No. 2010G06 (for Chinese researchers); the Lamont-Doherty Earth Obseruatory contribution No. 7626.

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Susanto, R.D., Wei, Z., Adi, R.T. et al. Observations of the Karimata Strait througflow from December 2007 to November 2008. Acta Oceanol. Sin. 32, 1–6 (2013). https://doi.org/10.1007/s13131-013-0307-3

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  • DOI: https://doi.org/10.1007/s13131-013-0307-3

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