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.

作为2015年6月至2017年6月间，日本横须贺国立大学与我国联合进行的黑潮－琉球流系统研究（JKRYCSS）的一部分，在 Miyakojima 岛西南部的 Kerama 海峡附近，沿着横跨黑潮和琉球流的剖面，部署了两个压力记录倒向回声测深仪（PIESS）和五个同时记录流速和压力的倒向回声测深仪（CPIESS），这些设备提供了为期两年的海底压力数据记录，数据显示出显著的21天周期性变化。