Coastal upwelling events along the southern coast of Java during the 2008 positive Indian Ocean Dipole
Coastal upwelling events along the southern coast of Java during the 2008 positive Indian Ocean Dipole
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DOI：
10.1007/s10872-018-0475-z
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发表时间：
2018-04
影响因子：
2.3
通讯作者：
T. Horii;I. Ueki;K. Ando
中科院分区：
文献类型：
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作者：
T. Horii;I. Ueki;K. Ando
为了了解沿海上升流系统沿着爪哇南部海岸，我们调查了海洋温度和盐度从Argo浮标。2008年5月初，印度洋偶极子事件开始发展，5月至9月爪哇南部附近出现异常凉爽的SST。在IOD高峰期间，Argo浮标成功地观测了距爪哇90公里范围内的温度和盐度垂直结构。浮标在7月和8月观测到两次季节内尺度的温度冷却事件，温跃层显著向上移动超过90米。在这些信号发出的同时，亦观测到沿岸异常东南风、本地海温及海平面下降，以及高盐度海水向上扩张。在8月的暴雨过程中，由异常风应力估算的垂直速度与观测结果吻合较好。这些结果表明，Argo浮标观测到的沿海上升流，这是加强了2008年正IOD，沿着爪哇南部海岸。
To understand the coastal upwelling system along the southern coast of Java, we investigated ocean temperature and salinity obtained from an Argo float. In 2008, a positive Indian Ocean Dipole (IOD) event began to develop in early May and anomalously cool SST developed around south of Java from May to September. During the peak of the IOD, an Argo float successfully observed vertical structure of temperature and salinity within 90 km from Java. The float observed two intraseasonal-scale temperature cooling events in July and August, with significant upward movements of the thermocline more than 90 m. Concurrent with the signals, anomalous southeasterly alongshore winds, lowering of local SST and sea level, and upward expansion of high-salinity water were also observed. During the event in August, vertical velocity estimated by the anomalous wind stress agreed well with the observations. These results indicate that the Argo float observed the coastal upwelling, which was enhanced by the 2008 positive IOD, along the southern coast of Java.