Spatila-temporal distribution of monohalomethane in the N Pacific
Project/Area Number |
24681001
|
Research Category |
Grant-in-Aid for Young Scientists (A)
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Allocation Type | Partial Multi-year Fund |
Research Field |
Environmental dynamic analysis
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Research Institution | Hokkaido University |
Principal Investigator |
Ooki Atsushi 北海道大学, 水産科学研究科(研究院), 准教授 (70450252)
|
Project Period (FY) |
2012-04-01 – 2016-03-31
|
Project Status |
Completed (Fiscal Year 2015)
|
Budget Amount *help |
¥27,820,000 (Direct Cost: ¥21,400,000、Indirect Cost: ¥6,420,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2013: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Fiscal Year 2012: ¥18,980,000 (Direct Cost: ¥14,600,000、Indirect Cost: ¥4,380,000)
|
Keywords | 揮発性有機物 / VOC / 有機物分解 / ハロカーボン / 溶存有機物 / 植物プランクトン / 生物地球化学 / 生物生産 / 有機ガス / ヨウ素 / 北極海 / ヨードメタン / クロロメタン / ブロモメタン / イソプレン / 光合成 / アンモニア / 噴火湾 / ベーリング海 |
Outline of Final Research Achievements |
Monohalomethanes (chloromethane, bromomethane, and iodomethane) are the dominant organic halogen compounds in the atmosphere. Ocean is an important source of monohalomethane. Spatial-temporal distributions of monohalomethane were measured in the NW Pacific and estern Arctic Ocean. Over the continental shelf of the Chukchi Sea in the Arctic Ocean, the concentration maxima of 3 monohalomethanes were found in the bottom layer water, in which bottom sediment, denitrification would occur owing to a large amount of settling organic particle. In the Funka-Bay, Hokkaido, Japan, concentration maxima of bromomethane and chloromethane were found in the subsurface layer in June when decompositions of organic material proceed. Phytoplankton culture experiment showed that productions of monohalomethane were found in the senescence stage after the exponential growth. It is considered that monohalomethane production in seawater is associated with cell senescence and degradation of organic matter.
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Report
(5 results)
Research Products
(18 results)
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[Journal Article] Concentration maxima of volatile organic iodine compounds in the bottom layer water and the cold, dense water over the Chukchi Sea in the western Arctic Ocean: a possibility of production related to the degradation of organic matter2016
Author(s)
Ooki, A., Kawasaki, S., Kuma, K., Nishino, S., and Kikuchi, T.
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Journal Title
Biogeosciences
Volume: 13
Issue: 1
Pages: 133-145
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] Regeneration dynamics of iron and nutrients from bay sediment into bottom water of Funka Bay, Japan2015
Author(s)
N. Hioki, K. Kuma, Y. Morita, D. Miura, A. Ooki, S. Tanaka, H. Onishi, T. Takatsu, N. Kobayashi, Y. Kamei
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Journal Title
J. Oceanogr.
Volume: 71
Issue: 6
Pages: 703-714
DOI
NAID
Related Report
Peer Reviewed
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[Journal Article] Laterally spreading iron, humic-like dissolved organic matter and nutrients in cold, dense subsurface water of the Arctic Ocean2014
Author(s)
Hioki,N., K. Kuma, Y. Morita, R. Sasayama, A. Ooki, Y. Kondo, H. Obata, J. Nishioka, Y. Yamashita, S. Nishino, T. Kikuchi, M. Aoyama
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Journal Title
Scientific reports
Volume: 4
Issue: 1
Pages: 6775-6775
DOI
Related Report
Peer Reviewed
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