Fluxes,source and transport of organic matter in the western Sea of Okhotsk: Stable carbon isotopic ratios of n-alkanes and total organic carbon |
| |
| Institution: | 1. Institute of Low Temperature Science, Hokkaido University, N19W8, Kita-ku, Sapporo, Hokkaido 060-0819, Japan;2. Graduate School of Environment Earth Science, Hokkaido University, N10W5, Kita-ku, Sapporo, Hokkaido 060-0810, Japan;1. School of Earth and Environmental Sciences, Queens College, City University of New York, Flushing, NY, USA;2. The Graduate Center, City University of New York, New York, NY, USA;3. Global Institute of Sustainability, Arizona State University, PO Box 875402, Tempe, AZ, USA;1. Department of Geology, University of Cincinnati, PO Box 210013, Cincinnati, OH 45221, USA;2. Department of Geosciences, Pennsylvania State University, University Park, PA 16802, USA;3. Department of Paleobiology, Smithsonian Institution, NHB121, PO Box 37012, Washington, DC 20013, USA;1. Department of Marine Organic Biogeochemistry, NIOZ Royal Netherlands Institute for Sea Research, P.O. Box 59, 1790 AB Den Burg (Texel), The Netherlands;2. School of Civil Engineering and Geosciences, Newcastle University, Drummond Building, Newcastle upon Tyne NE1 7RU, United Kingdom;3. All-Russian Research Institute for Geology and Mineral Resources of the World Ocean (VNIIOkeangeologia), Ministry of Natural Resources, Russian Academy of Science, St. Petersburg, Russian Federation;1. School of Environment and Energy, South China University of Technology, Guangzhou 510006, China;2. LAPC, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China;3. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China;4. Institute of Surface-Earth System Science, Tianjin University, Tianjin 300072, China;5. State-owned Assets Management Office, Guilin Tourism University, Guilin 541006, China;6. College of Earth Sciences, University of Chinese Academy of Sciences, Beijing 100049, China |
| |
| Abstract: | Settling particles and surface sediments collected from the western region of the Sea of Okhotsk were analyzed for total organic carbon (TOC), long-chain n-alkanes and their stable carbon isotope ratio (δ13C) to investigate sources and transport of total and terrestrial organic matter in the western region of the sea. The δ13C measurements of TOC in time-series sediment traps indicate lateral transport of resuspended organic matter from the northwestern continental shelf to the area off Sakhalin via the dense shelf water (DSW) flow at intermediate depth. The n-alkanes in the surface sediments showed strong odd carbon number predominance with relatively lighter δ13C values (from ?33‰ to ?30‰). They fall within the typical values of C3-angiosperms, which is the main vegetation in east Russia, including the Amur River basin. On the other hand, the molecular distributions and δ13C values of n-alkanes in the settling particles clearly showed two different sources: terrestrial plant and petroleum in the Sea of Okhotsk. We reconstructed seasonal change in the fluxes of terrestrial n-alkanes in settling particles using the mixing model proposed by Lichtfouse and Eglinton 1995. 13C and 14C evidence of a soil by fossil fuel and reconstruction of the composition of the pollutant. Organic Geochemistry 23, 969–973]. Results of the terrestrial n-alkane fluxes indicate that there are two transport pathways of terrestrial plant n-alkanes to sediments off Sakhalin, the Sea of Okhotsk. One is lateral transport of resuspended particles with lithogenic material from the northwestern continental shelf by the DSW flow. Another is the vertical transport of terrestrial plant n-alkanes, which is independent of transport of lithogenic material. The latter may include dry/wet deposition of aerosol particles derived from terrestrial higher plants possibly associated with forest fires in Siberia. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
