Organic carbon accumulation and sulfate reduction rates in slope and basin sediments of the Ulleung Basin, East/Japan Sea SCIE SCOPUS

Cited 30 time in WEB OF SCIENCE Cited 34 time in Scopus
Title
Organic carbon accumulation and sulfate reduction rates in slope and basin sediments of the Ulleung Basin, East/Japan Sea
Author(s)
Lee, Taehee; Hyun, Jung-Ho; Mok, Jin Sook; Kim, Dongseon
KIOST Author(s)
Lee, Taehee(이태희)Kim, Dongseon(김동선)
Publication Year
2008-06
Abstract
This study investigated the organic carbon accumulation rates (OCARs) and sulfate reduction rates (SRRs) in slope and basin sediments of the Ulleung Basin, East/Japan Sea. These sediments have high organic contents at depths greater than 2,000 m; this is rare for deep-sea sediments, except for those of the Black Sea and Chilean upwelling regions. The mean organic carbon to total nitrogen molar ratio was estimated to be 6.98 in the Ulleung Basin sediments, indicating that the organic matter is predominantly of marine origin. Strong organic carbon enrichment in the Ulleung Basin appears to result from high export production, and low dilution by inputs of terrestrial materials and calcium carbonate. Apparent sedimentation rates, calculated primarily from excess Pb-210 distribution below the zone of sediment mixing, varied from 0.033 to 0.116 cm year(-1), agreeing well with previous results for the basin. OCARs fluctuated strongly in the range of 2.06-12.5 g C m(-2) year(-1), these rates being four times higher at the slope sites than at the basin sites. Within the top 15 cm of the sediment, the integrated SRRs ranged from 0.72 to 1.89 mmol m(-2) day(-1), with rates approximately twice as high in the slope areas as in the basin areas. SRR values were consistently higher in areas of high sedimentation and of high organic carbon accumulation, correlating well with apparent sedimentation rates and OCARs. The sulfate reduction rates recorded in the basin and slope sediments of the Ulleung Basin are higher than those reported for other parts of the world, with the exception of the Peruvian and Chilean upwelling regions. This is consistent with the high organic carbon contents of surface sediments of the Ulleung Basin, suggesting enhanced organic matter fluxes.
ISSN
0276-0460
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/4497
DOI
10.1007/s00367-007-0097-8
Bibliographic Citation
GEO-MARINE LETTERS, v.28, no.3, pp.153 - 159, 2008
Publisher
SPRINGER
Subject
CONTINENTAL-MARGIN SEDIMENTS; SULFIDE MINERAL FORMATION; EAST CHINA SEA; BLACK-SEA; SURFACE SEDIMENTS; UPWELLING REGION; SHELF SEDIMENTS; PACIFIC-OCEAN; MATTER; OXIDATION
Type
Article
Language
English
Document Type
Article
Publisher
SPRINGER
Related Researcher
Research Interests

Biogeochemistry,Carbon cycle,Ocean acidification,생지화학,탄소순환,해양산성화

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