Bottom pressure near the Ryukyu Island Chain with 21-day period

As a part of the Joint Kuroshio–Ryukyu Current System Study (JKRYCSS) between June 2015 and June 2017, two pressure-recording inverted echo sounders (PIESs) and five current and pressure-recording inverted echo sounders (CPIESs) deployed along a section transecting the Kuroshio and Ryukyu currents near Miyakojima Island, southwest of the Kerama Gap provided 2-year bottom pressure records which shows significant 21-day period variability.


Physical oceanography


Bottom pressure


27N, 22S, 128E, 124W


PIES(pressure-recording inverted echo sounders) is an echo sounder that rests on the seafloor and records acoustic round-trip travel time, bottom pressure, and bottom temperature. CPIES(current and pressure-recording inverted echo sounders) is a PIES further equipped with a current meter ~50 m above the bottom.


Bottom pressure with 21-day period
938 KoTEXTProcessed data
Bottom pressure - hourly data
936 KoTEXTRaw data
How to cite
Hua Zheng, Xiao-Hua Zhu, Hirohiko Nakamura, Jae-Hun Park, Chanhyung Jeon, Ruixiang Zhao, Ayako Nishina, Chuanzheng Zhang, Hanna Na, Ze-Nan Zhu, Hong sik Min (2019). Bottom pressure near the Ryukyu Island Chain with 21-day period. SEANOE.

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