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

Title
Black carbon in deep-sea sediments from the northeastern equatorial Pacific Ocean
Author(s)
김동현; 이용일; 형기성; 유찬민
KIOST Author(s)
Hyeong, Kiseong(형기성)Yoo, Chan Min(유찬민)
Publication Year
2011-12-08
Abstract
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
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/27987
Bibliographic Citation
AGU Fall Meeting 2011, pp.1, 2011
Publisher
American Geophysical Union
Type
Conference
Language
English
Publisher
American Geophysical Union
Related Researcher
Research Interests

Ocean Geology,Mineral resources,해양지질,광물자원

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