Intraseasonal Variability in the Makassar Strait Thermocline
Intraseasonal Variability in the Makassar Strait Thermocline
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DOI：
10.1357/002224009792006115
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发表时间：
2009-11
影响因子：
0.5
通讯作者：
K. Pujiana;A. Gordon;J. Sprintall;Dwi Susanto
中科院分区：
文献类型：
--
作者：
K. Pujiana;A. Gordon;J. Sprintall;Dwi Susanto
通过分析2004年1月至2006年11月的沿海峡流场、区域海平面异常和风场，研究了马卡萨尔海峡温跃层的季节内变率。马卡萨尔海峡沿槽流45-90天的主导变率是水平和垂直相干的，并表现出垂直能量传播。大部分的马卡萨尔ISV与当地大气ISV所施加的能量是不耦合的：相反，马卡萨尔ISV是由于从龙目海峡辐射的远程强迫斜压波和起源于苏拉威西海的深层ISV的组合。与ENSO相关的温跃层深度变化影响了马卡萨尔海峡下温跃层的ISV特征，在厄尔尼诺期间，当温跃层变浅时，ISV增强，而在拉尼娜期间，ISV减弱。
Intraseasonal variability [ISV] in the Makassar Strait thermocline is examined through the analysis of along-channel flow, regional sea level anomaly and wind fields from January 2004 through November 2006. The dominant variability of 45–90 day in the Makassar Strait along-channel flow is horizontally and vertically coherent and exhibits vertical energy propagation. The majority of the Makassar ISV is uncoupled to the energy exerted by the local atmospheric ISV: instead the Makassar ISV is due to the combination of a remotely forced baroclinic wave radiating from Lombok Strait and deep reaching ISV originating in the Sulawesi Sea. Thermocline depth changes associated with ENSO influence the ISV characteristics in the Makassar Strait lower thermocline, with intensified ISV during El Nino when the thermocline shallows and weakened ISV during La Nina.