Intraseasonal Kelvin wave in Makassar Strait
Intraseasonal Kelvin wave in Makassar Strait
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DOI：
10.1002/jgrc.20069
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发表时间：
2013-04
影响因子：
--
通讯作者：
K. Pujiana;A. Gordon;J. Sprintall
中科院分区：
文献类型：
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作者：
K. Pujiana;A. Gordon;J. Sprintall
[1]2004-2006年期间的时间序列观测显示，存在60-90天的季节内事件，这些事件影响了马卡萨尔海峡内的运输和混合环境。在跃层内观测到的速度和温度波动揭示了Kelvin波的存在，包括垂直能量传播、能量均分和非色散关系。750米和1500米处的两个海流计进一步证明了下沉开尔文波的垂直结构类似于第二斜压波的垂直结构。开尔文波的能量来自赤道印度洋风，包括与马登-朱利安振荡有关的风，并沿着100米等深线从龙目岛海峡传播到马卡萨尔海峡。在跃层内向北传播的Kelvin波使向南的Makassar海峡通流减少达2Sv，并导致垂直扩散率显着增加。
[1] Time series observations during 2004–2006 reveal the presence of 60–90 days intraseasonal events that impact the transport and mixing environment within Makassar Strait. The observed velocity and temperature fluctuations within the pycnocline reveal the presence of Kelvin waves including vertical energy propagation, energy equipartition, and nondispersive relationship. Two current meters at 750 and 1500 m provide further evidence that the vertical structure of the downwelling Kelvin wave resembles that of the second baroclinic wave mode. The Kelvin waves derive their energy from the equatorial Indian Ocean winds, including those associated with the Madden-Julian oscillations, and propagate from Lombok Strait to Makassar Strait along the 100-m isobath. The northward propagating Kelvin waves within the pycnocline reduce the southward Makassar Strait throughflow by up to 2 Sv and induce a marked increase of vertical diffusivity.