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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Acknowledgements
The Chinese researchers are supported by the National Natural Science Foundation of China (grants no. 41306031, 41476025, and 41506036), the NSFC-Shandong Joint Fund for Marine Science Research Centers (grant no. U1606405), the National Program on Global Change and Air-Sea Interaction (grant no. GASI-IPOVAI-01-02, GASI-IPOVAI-02 and GASI-IPOVAI-03), the Basic Research Operating Funds of the First Institute of Oceanography, State Oceanic Administration (grant no. 2013G35 and 2014G26), and the China Postdoctoral Science Foundation (grant no. 2014M561883). The Indonesian researchers are supported by the Agency for Marine and Fisheries Research and Human Resources. The U.S. part of the Sunda Strait observation is supported by the Office of Naval Research, USA, grant # N00014-08-01-0618. All in situ data are archived at the Agency for Marine and Fisheries Research and Human Resources. The processed data are available from the authors upon request (weizx@fio.org.cn). The sea level anomaly data were produced by Ssalto/Duacs and distributed by AVISO (http://www.aviso.altimetry.fr/duacs/). CCMP version 2.0 vector wind analyses were produced by Remote Sensing Systems (http://www.remss.com).
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Li, S., Wei, Z., Susanto, R.D. et al. Observations of intraseasonal variability in the Sunda Strait throughflow. J Oceanogr 74, 541–547 (2018). https://doi.org/10.1007/s10872-018-0476-y
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DOI: https://doi.org/10.1007/s10872-018-0476-y