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Distribution of Dissolved Organic Carbon (DOC) in the Southwestern East Sea in Summer
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  • Journal title : Ocean and Polar Research
  • Volume 32, Issue 3,  2010, pp.291-297
  • Publisher : Korea Institute of Ocean Science & Technology
  • DOI : 10.4217/OPR.2010.32.3.291
 Title & Authors
Distribution of Dissolved Organic Carbon (DOC) in the Southwestern East Sea in Summer
Kim, Tae-Hoon; Kim, Gue-Buem;
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 Abstract
In the summer of 2008 (August 4-14), vertical and horizontal distributions of inorganic nutrients and dissolved organic carbon (DOC) were measured in the southwestern East Sea. Concentrations of DOC were determined for the first time in the southwestern East Sea using the high-temperature combustion oxidation (HTCO) method, and results were compared with those measured by another laboratory. Concentrations of DOC ranged from 58 to 104 in the upper 200 m, showing a typical decreasing pattern with depth. Generally, concentrations of DOC were relatively lower, with higher nutrient concentrations, in the upper layer of the coastal upwelling zone. Concentrations of DOC ranged from 54 to 64 in the deep Ulleung Basin (200-1500 m), and were higher than those in the Pacific and Atlantic oceans. In association with rapid vertical ventilation of the euphotic, this difference indicates a larger accumulation of semi-labile DOC in the deep East Sea than in the major oceans. A correlation between apparent oxygen utilization (AOU) and DOC in the deep ocean of the East Sea revealed that only a small portion (<10%) of the sinking DOC, relative to the sinking particulate organic carbon (POC), contributes to microbial degradation. Our results present an important data set of DOC in the East Sea, which plays a critical role in carbon cycle modeling and sequestration.
 Keywords
dissolved organic carbon;nutrients;coastal upwelling;apparent oxygen utilization;East Sea;
 Language
English
 Cited by
1.
Spatio-Temporal Variation of Cold Water Masses along the Eastern Coast of Korea in 2013 and 2014, Journal of the Korean Society of Marine Environment and Safety, 2016, 22, 3, 286  crossref(new windwow)
2.
Dissolved organic carbon in the precipitation of Seoul, Korea: Implications for global wet depositional flux of fossil-fuel derived organic carbon, Atmospheric Environment, 2012, 59, 117  crossref(new windwow)
3.
Extraordinary slow degradation of dissolved organic carbon (DOC) in a cold marginal sea, Scientific Reports, 2015, 5, 13808  crossref(new windwow)
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