对印度尼西亚海域杰洛洛海峡潮汐流的系泊观测

IF 2.1 4区 地球科学 Q2 MARINE & FRESHWATER BIOLOGY
Tianxiang Chang
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引用次数: 0

摘要

利用两台声学多普勒海流剖面仪分别向上和向下覆盖海峡全深度的全年锚泊观测,研究了印度尼西亚海域杰洛洛海峡内部潮流的垂直结构。从全深度海流剖面测量结果中提取了气压潮汐,显示了主要的 M2、K1 和 O1 潮流,其振幅分别为 13.5 厘米/秒-1、11.0 厘米/秒-1 和 7.6 厘米/秒-1,从正北方向顺时针方向分别为 34.5°、63.1° 和 75.2°,几乎呈往复运动。研究发现,杰洛洛海峡的内潮汐流约占总动能的 50%,以低气压模式为主,其中 M2 潮汐是最主要的潮汐成分。观测到了 D3 和 D4 的高频内潮,其条纹结构与 M2 内潮相似,并认为是受非线性过程的刺激。历史上首次揭示了杰洛洛海峡复杂的潮汐流垂直结构。它对垂直湍流混合的潜在影响表明了其在全球海洋环流和气候中的重要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Mooring observations of tidal currents in the Jailolo Strait of the Indonesian seas

The vertical structure of internal tidal currents in the Jailolo Strait of the Indonesian seas is studied using the year-long mooring observations with two Acoustic Doppler Current Profiler instruments looking upward and downward, respectively, coving the full depth of the strait. The barotropic tides are extracted from the full-depth current profile measurements, showing the dominant M2, K1, and O1 tidal currents with amplitudes of 13.5 cm s−1, 11.0 cm s−1 and 7.6 cm s−1, in nearly reciprocating movement in the direction of 34.5°, 63.1°, and 75.2° clockwise from due north. The internal tidal currents in the Jailolo Strait contributing to about 50% of the total kinetic energy are found to be dominated by the low baroclinic modes, with M2 tide as the most dominant tidal constituent. High-frequency internal tides of D3 and D4 are observed, with baroclinic structure similar to that of M2 tides, and are suggested to be stimulated by nonlinear processes. The complicated vertical structure of tidal currents in the Jailolo Strait is disclosed for the first time in history. Its potential impact on vertical turbulent mixing suggests its importance in global ocean circulation and climate.

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来源期刊
Journal of Sea Research
Journal of Sea Research 地学-海洋学
CiteScore
3.20
自引率
5.00%
发文量
86
审稿时长
6-12 weeks
期刊介绍: The Journal of Sea Research is an international and multidisciplinary periodical on marine research, with an emphasis on the functioning of marine ecosystems in coastal and shelf seas, including intertidal, estuarine and brackish environments. As several subdisciplines add to this aim, manuscripts are welcome from the fields of marine biology, marine chemistry, marine sedimentology and physical oceanography, provided they add to the understanding of ecosystem processes.
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