Deep Ocean Monitoring : the East Sea (Sea of Japan) Kuh Kim 1 , Kyung-Il Chang 1 , Yun-Bae Kim 2 Jae-Hak Lee 3 , Sang-Chul Hwang 3 1 Seoul National University 2 Pohang University of Science and Technology 3 Korea Ocean Research and Development Institute OceanSITES meeting December 1, 2011, SIO, La Jolla
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Deep Ocean Monitoring : the East Sea (Sea of Japan) the East Sea (Sea of Japan) Kuh Kim 1, Kyung-Il Chang 1, Yun-Bae Kim 2 Jae-Hak Lee 3, Sang-Chul Hwang.
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Deep Ocean Monitoring :
the East Sea (Sea of Japan)
Kuh Kim1, Kyung-Il Chang1, Yun-Bae Kim2
Jae-Hak Lee3, Sang-Chul Hwang3
1Seoul National University2Pohang University of Science and Technology3Korea Ocean Research and Development Insti-tute
OceanSITES meeting December 1, 2011, SIO, La Jolla
Upper Circulation & Topography
Area ~106 km2
Average depth : ~ 1,700 m Max. depth : ~ 4,000 m 3 deep basins (> 2000m) 4 shallow straits (< 200m) 3 4 o
3 6 o
3 8 o
4 0 o
4 2 o
4 4 o
4 6 o
4 8 o
5 0 o
5 2 o
128 o 130 o 132 o 134 o 136 o 138 o 140 o 142 o
2000 300010000
Depth (m)
Japan Basin
Yamato Basin
Ulleung Basin
Korea Strait
Tsugaru Strait
Soya Strait
Tartar Strait
Kuroshio Kuroshio branches: Tsushima Current
Oceanographic Characteristics
3500
3000
2500
2000
1500
1000
500
0
SP.T
Dep
th (
m)
Cold RegionWarm Region Warm and cold water regions
across a subpolar front Deep water formation in winter &
Chang et al. (2009) Deployment of an array of 5 moorings for ~16 months Two-way circulation: weak & broad inflow vs. strong & narrow outflow (Dokdo Abyssal Current) Strong inflow takes place at EC1. A single point current measurement can be used for indexing the inflow deep water transport. Mean net transport below 1800 m ~ 0 Sv Mean inflow transport below 1800 m ~0.16 Sv
Record-length mean currents
Bottom currents at EC1 vs. total deep water transport below 1800 mEC1
Marginal Sea OceanSITES site
EC1 in November 1996 : a joint SNU-KORDI-WHOI mooring Financial Support: 1996~2005 : KORDI’s in-house projects 2006~2015 : SNU’s EAST-I SNU & other Korean institutions will sustain this mooring.
We wish to enroll EC1 as a marginal sea OceanSITES site.
Data sharing will be free and open, available within 12 months
of instrument recovery.
Contact: Prof. Kyung-Il Chang ([email protected]), Seoul National University