EC1, mooring time-series since 1996

Date 2018-12
Temporal extent 1996-11 -2017-05
Author(s) Noh SuyunORCID1, Nam SunghyunORCID1, 2
Contributor(s) Kim Kuh, Chang Kyung-Il, Kim Yun-Bae, Byun Sang-Kyung, Hogg Nelson, Worrilow Scott, Watts Randolph, Teague William, Son Young-Tae, Hwang Sang-Chul
Affiliation(s) 1 : School of Earth and Environmental Sciences, Seoul National University, Seoul, Republic of Korea
2 : Research Institute of Oceanography, Seoul National University, Seoul, Republic of Korea
DOI 10.17882/58134
Publisher SEANOE
Keyword(s) Long-term time-series, Subsurface mooring, East Sea (Japan Sea), Ulleung Interplain Gap, Ulleung Basin, Deep current, Upper current, Deep circulation, Upper circulation, Waves

The East Sea Current Measurement (EC1) is a subsurface mooring located in the deep channel of the Ulleung Interplain Gap (UIG) in the southwestern East Sea (Japan Sea), connecting the Japan Basin (JB) and Ulleung Basin (UB). The EC1 was first deployed at a depth of 2300 m in 1996 and has been operated to provide long time-series of currents and water properties. The UIG, a unique conduit for deep water exchange between JB and UB, is approximately 75 km wide and more than 2000 m deep, with a slight broadening towards the UB in the southwestern East Sea. Single point current-meters and other sensors are attached at 400 m, 1400 m, 2200 m, and other depths of the EC1 mooring. An upward-looking acoustic Doppler current profiler is often mounted between 100 and 500 m. In 2017, dissolved oxygen sensors were added at 1400 and 2250 m. The sampling intervals of the sensors are less than an hour. The data are quality controlled and quality assured before provision to the community via OceanSITES and SEANOE.

Licence CC-BY-NC
Acknowledgements We would like to thank Kuh Kim, Kyung-Il Chang, and Yun-Bae Kim, who were deeply involved in the initiation and early operation of EC1. The site is now registered with OceanSITES ( Financial support was originally provided by the Ministry of Oceans and Fisheries (MOF), Republic of Korea, via the EAST-I program. Special thanks to the Sang-Chul Hwang, Young-Tae Son, and SNU OOL members for their dedicated efforts to maintain the mooring. This work is currently part of the project titled “Deep Water Circulation and Material Cycling in the East Sea”, funded by the MOF, Republic of Korea.
Sensor metadata

SBE39 MicroCAT (Sea-Bird Scientific): temperature, pressure

SBE37SMP MicroCAT (Sea-Bird Scientific): temperature, conductivity, pressure

SBE37SMP-ODO MicroCAT (Sea-Bird Scientific): temperature, conductivity, pressure, dissolved oxygen

Aquadopp DW (Nortek): currents, temperature, pressure

RCM-7 (Aanderaa): currents, temperature, pressure

RCM-9 (Aanderaa): currents, temperature, pressure

RCM-11 (Aanderaa): currents, temperature, pressure, dissolved oxygen

(optional) WH 300 kHz sentinel type ADCP (Teledyne RD Instruments): currents, temperature, pressure

(optional) Sediment trap

File Size Format Processing Access
EC1 deployment (1996-2017) 86 MB NC, NetCDF Quality controlled data Open access
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