Black carbon in deep-sea sediments from the northeastern equatorial Pacific Ocean

Black carbon in deep-sea sediments from the northeastern equatorial Pacific Ocean
김동현; 이용일; 형기성; 유찬민
KIOST Author(s)
Hyeong, Kiseong(형기성)Yoo, Chan Min(유찬민)
Publication Year
Deep-sea sediment core is a good archive for understanding the land–ocean interactions via atmosphere, due to it is little influenced by fluvial and continental shelf processes. This study dealt with black carbon(BC) in a 328 cm-long piston core collected from the northeastern equatorial Pacific Ocean (16°12N, 125°59W), covering the last 15 Ma (Hyeong at al., 2004). BC is a common name of carbon continuum formed by incomplete combustion of fossil fuels and plant materials. Though it may react with ozone and produce water-soluble organic carbon, BC has commonly refractory nature. Thus BC in preindustrial sediment can be a tracer of forest-fire events. BC is purely terrestrial in origin, and is transported to marine environments by atmospheric and fluvial processes. Therefore, distribution of BC in deep-sea sediments could be used to understand atmospheric circulation. Chemical oxidation was used to determine BC in this study following Lim and Cachier (1996). Concentration of BC varies from 0.010% to 0.233% of total sediments. Mass accumulation rate (MAR) of BC ranged between 0.077 mg/cm^2/1000 yrs and 47.49 mg/cm^21000 yrs. It is noted that MAR in sediments younger than 8 Ma (av. 9.0 mg/cm^2/1000 yrs) is higher than that in sediments older than 8 Ma (av. 3.2 mg/cm^2/1000 yrs). Stable carbon isotope value of BC increases with time from the low δ13C value near 13 Ma until it
Bibliographic Citation
AGU Fall Meeting 2011, pp.1, 2011
American Geophysical Union
American Geophysical Union
Related Researcher
Research Interests

Ocean Geology,Mineral resources,해양지질,광물자원

Files in This Item:
There are no files associated with this item.


Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.