Observations of the Karimata Strait througflow from December 2007 to November 2008
Observations of the Karimata Strait througflow from December 2007 to November 2008
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DOI：
10.1007/s13131-013-0307-3
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发表时间：
2013-05
影响因子：
1.4
通讯作者：
R. Susanto;Zexun Wei;Rameyo T. Adi;Bin Fan;Shujiang Li;G. Fang
中科院分区：
文献类型：
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作者：
R. Susanto;Zexun Wei;Rameyo T. Adi;Bin Fan;Shujiang Li;G. Fang
为了定量估算南海和印度尼西亚海之间通过Karimata海峡的体积和财产输送，在海峡中部署了两个抗拖网底架，嵌入ADCP，以测量速度剖面作为南海-印度尼西亚海输送/交换（SITE）计划的一部分。一对表面和底部的声学调制解调器被用来传输测得的速度，而不恢复系泊。文中还对仪器在野外工作中的优点和存在的问题进行了讨论。野外观测证实，在上层向北（反向）流动的下方，存在着经Karimata海峡的印度尼西亚贯穿流的南海分支，冬季南向流动较强，夏季南向底层流动较弱。2007年12月至2008年3月（冬季）的平均流量、热量和淡水输送估计为（−2.7±1.1）×106m3/s，（−0.30±0.11）PW，（−0.18±0.07）× 106 m3/s，2008年5 - 9月（夏季）为（1.2±0.6）×106m3/s，（0.14±0.03）PW，（0.12±0.04）× 106 m3/s，2007年12月至2008年10月的整个记录为（−0.5±1.9）× 106 m3/s，（−0.05±0.22）PW，（−0.01±0.15）× 106 m3/s（负/正代表向南/向北输送）。北方夏季向南的底流的存在意味着Fang et al.（2010）在冬季发现的由北向南向下的海面坡度是一个全年性的现象。
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)×106m3/s, (−0.30±0.11) PW, (−0.18±0.07)×106m3/s and from May to September 2008 (summer) is (1.2±0.6)×106m3/s, (0.14±0.03) PW, (0.12±0.04)×106m3/s and for the entire record from December 2007 to October 2008 is (−0.5±1.9)×106m3/s, (−0.05±0.22) PW, (−0.01±0.15)×106m3/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.