Organic carbon and nitrogen composition in the sediment of the Kara Sea, Arctic Ocean during the Last Glacial Maximum to Holocene times
- Title
- Organic carbon and nitrogen composition in the sediment of the Kara Sea, Arctic Ocean during the Last Glacial Maximum to Holocene times
- Author
- 신경훈
- Keywords
- CONTINENTAL-MARGIN; ANNA TROUGH; MATTER; ACCUMULATION; DEGLACIATION; ATLANTIC; PACIFIC
- Issue Date
- 2007-06
- Publisher
- AMER GEOPHYSICAL UNION
- Citation
- GEOPHYSICAL RESEARCH LETTERS, v. 34, No. 12, Article no. L12607
- Abstract
- A sharp decrease in C-org/N-tot ratios and apparently heavier stable isotope ratios of C-org and N-tot (delta C-13(org) and delta N-15(tot)) after deglaciation were observed in sediment cores St-25 and St-34 collected from the Saint Anna Trough in the Kara Sea, exhibiting a change of sediment origin from terrestrial to marine during the LGM and Holocene times. Organic nitrogen (N-org) contributed about 40% to total nitrogen (N-tot) during the Holocene, but the Norg fraction was hardly observed in the lower LGM sediments ( below 120 cm depth in St-25 and beneath 170 cm in St-34). This may be due to a permanent cover of sea ice in the area during the LGM. In addition, the delta C-13 values for OClabile and OCresi were remarkably different between LGM and Holocene sediment. The unexpected lighter delta C-13 values for OCresi for the LGM period might be due to methanotrophic bacteria in the sediment of Kara Sea.
- URI
- https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2007GL030068https://repository.hanyang.ac.kr/handle/20.500.11754/106608
- ISSN
- 0094-8276; 1944-8007
- DOI
- 10.1029/2007GL030068
- Appears in Collections:
- COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E](과학기술융합대학) > MARINE SCIENCE AND CONVERGENCE ENGINEERING(해양융합공학과) > Articles
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