Observations of intraseasonal variability in the Sunda Strait throughflow |
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| Authors: | " target="_blank">Shujiang Li Zexun Wei R Dwi Susanto Yaohua Zhu Agus Setiawan Tengfei Xu Bin Fan Teguh Agustiadi Mukti Trenggono Guohong Fang |
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| Institution: | 1.Key Laboratory of Marine Science and Numerical Modeling, First Institute of Oceanography, State Oceanic Administration,Qingdao,China;2.Laboratory for Regional Oceanography and Numerical Modeling, Qingdao National Laboratory for Marine Science and Technology,Qingdao,China;3.Department of Atmospheric and Oceanic Science,University of Maryland,College Park,USA;4.Faculty of Earth Sciences and Technology,Bandung Institute of Technology,Bandung,Indonesia;5.Agency for Marine & Fisheries Research, Ministry of Marine Affairs and Fisheries,Jakarta,Indonesia;6.Department of Marine Science, Faculty of Fisheries and Marine Science,Jenderal Soedirman University,Purwokerto,Indonesia |
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| Abstract: | Using velocity profiles observed by bottom-mounted ADCPs, we identified strong intraseasonal variability in the Sunda Strait throughflow. This intraseasonal variability, with typical periods of 20–40 days and the strongest energy occurring in the boreal spring, can reverse the Sunda Strait throughflow. Further analysis showed this intraseasonal variability to be closely related to local zonal wind and the sea level gradient along the strait. These observations confirm for the first time the existence of Kelvin-wave-like signals in the Sunda Strait, propagating from the equatorial Indian Ocean. This study also provides new insights into the effects of Kelvin waves on the Sunda Strait throughflow. |
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