2006 Fiscal Year Final Research Report Summary
Long-term interaction between dynamics of marine organic pools and earth's surface bioelemental cycles
| Project/Area Number |
14103001
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| Research Category |
Grant-in-Aid for Scientific Research (S)
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| Allocation Type | Single-year Grants |
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| Research Field |
地球化学
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| Research Institution | Nagoya University |
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Principal Investigator |
TANOUE Eiichiro Nagoya University, Graduate School of Environmental Studies, Prof., 環境学研究科, 教授 (50133129)
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| Co-Investigator(Kenkyū-buntansha) |
KITAGAWA Hiroyuki Nagoya University, Graduate School of Environmental Studies, Assoc. Prof., 環境学研究科, 助教授 (00234245)
NISHIDA Tamihito Nagoya University, Graduate School of Environmental Studies, Assist. Prof., 環境学研究科, 助手 (60313988)
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| Project Period (FY) |
2002 – 2006
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| Keywords | Oceanic Carbon Pool / Dissolved Organic Matter / Particulate Organic Matter / Marine Protein / Marine lipids / Intermolecular association |
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| Research Abstract |
The measurements of fluorescent intensity derived from marine humic-like materials and ^<14>C of dissolved lipids as well as dissolved organic carbon (DOC) were carried out in 2006 fiscal year for better understanding the dynamics of marine organic matter pool. The results are summarized as follows.
Fluorescence dissolved organic matter (FDOM) was selected as a representative of major component of DOM in quantity but chromatographically-uncharacterizable component in quality, and the basin scale distribution of fluorescent intensity were clarified. The lowest fluorescent intensity was always found in surface waters, and it increased with increasing depth. The distribution of FDOM was similar to the of apparent oxygen untilization (AOU), and they are positively correlated in the mesopelagic and abyssal layers, indicating that FDOM is in situ produced to biological degradation of organic matter and is bio-refractory for〜900 yr. The production rate of FDOM is comparable to riverine input of DOC and burial rate of organic carbon to sediment.
^<14>C concentration of dissolved lipid and DOC collected from the depth of 5 m were 72.32 ± 2.01 pMC (2600 yr BP), 93.48 ± 2.03 pMC (540 yr BP), respectively, at the innermost station in Ise Bay, and were 41.31 ± 1.64 pMC (7100 yr BP) and 95.25±2.09 pMC (390 yr BP), respectively, at the station on the mouth of Sagami Bay. Interestingly, ^<14>C concentrations of lipid were commonly lower than those of DOC, implying that the dynamics of dissolved lipid and bulk dissolved organic matter were different each other.
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[Journal Article] Spatial variability of iron in the surface water of the northwestern North Pacific Ocean2004
Author(s)
Takata, H., K.Kuma, S.Iwade, Y.Yamajyoh, A.Yamaguchi, S.Takagi, K.Sasaoka, Y.Yamashita, E.Tanoue, T.Midorikawa, K.Kimura, J.Nishioka
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Journal Title
Mar.Chem. 86
Pages: 139-157
Description
「研究成果報告書概要(欧文)」より
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