Sedimentary Organic Carbon Budget Across the Slope to the Basin in the Southwestern Ulleung (Tsushima) Basin of the East (Japan) Sea SCIE SCOPUS

Cited 1 time in WEB OF SCIENCE Cited 1 time in Scopus
Title
Sedimentary Organic Carbon Budget Across the Slope to the Basin in the Southwestern Ulleung (Tsushima) Basin of the East (Japan) Sea
Author(s)
Lee, Jae Seong; Han, Jeong Hee; An, Sung-Uk; Kim, Sung-Han; Lim, Dhongil; Kim, Dongseon; Kang, Dong-Jin; Park, Young-Gyu
KIOST Author(s)
Lee, Jae Seong(이재성)Kim, Sung Han(김성한)Lim, Dhongil(임동일)Kim, Dongseon(김동선)Kang, Dong-Jin(강동진)Park, Young Gyu(박영규)
Publication Year
2019-09
Abstract
With the total sediment oxygen uptake rates measured using an in situ benthic chamber, vertical distributions of organic carbon, and sedimentation rates estimated by excess Pb-210 across the slope to the basin sediment of the southwestern region of the Ulleung (Tsushima) Basin (UB), the partitioning of organic carbon fluxes in the sediment was estimated to understand the biogeochemical cycles of organic carbon in the high productivity marginal sea. The results of depth attenuation of total oxygen uptake (TOU) demonstrate that the organic carbon oxidation of the UB sediment was 2.5 times higher than that obtained from the empirical relationship of the global's depth attenuation of TOU. Similar to TOU, the high mass accumulation rates observed in the slope region were 9.5 times higher than the rate in the basin, indicating that the slope may act as the depocenter of organic carbon. The organic carbon budget with water depth gradient implies that a significant fraction of the organic carbon deposited into sediment is supplied by lateral transport down the slope. Definite increasing C/N ratio with water depth indicates that the refractory organic carbon seems to be successively transported later from shelf to slope. The total burial flux in the sediment of southwestern UB was estimated to be 0.46 +/- 0.04 Tg C/year, which is similar to the megadepocenter of the Congo River fan. Our results imply that the UB sediment may be an important biogeochemical reaction place not only for organic carbon but also materials linked to primary production.
ISSN
2169-8953
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/543
DOI
10.1029/2019JG005138
Bibliographic Citation
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES, v.124, no.9, pp.2804 - 2822, 2019
Publisher
AMER GEOPHYSICAL UNION
Subject
MID-ATLANTIC BIGHT; CONTINENTAL-SLOPE; SULFATE REDUCTION; SINKING PARTICLES; SURFACE SEDIMENTS; BURIAL FLUXES; MATTER; RATES; SHELF; ACCUMULATION
Keywords
East (Japan) Sea; benthic chamber; organic carbon oxidation; mass budget of organic carbon; lateral transport; burial flux
Type
Article
Language
English
Document Type
Article
Publisher
AMER GEOPHYSICAL UNION
Related Researcher
Research Interests

ocean circulation,ocean mixing,marine debris,해양순환,해양혼합,해양부유물

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