2013 Fiscal Year Final Research Report
Exploration for a new paleoclimate proxy using fossil water in Sphagnum peat layers
| Project/Area Number |
23654193
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Geochemistry/Astrochemistry
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| Research Institution | Kyushu University |
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Principal Investigator |
AKAGI Tasuku 九州大学, 理学(系)研究科(研究院), 教授 (80184076)
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| Project Period (FY) |
2011 – 2013
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| Keywords | ミズゴケ / 保持水 / ミズゴケ泥炭 / 水素同位体比 / 酸素同位体比 |
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| Research Abstract |
Sphagnum peat samples were obtained from Lyngmossen, Sweden. They were squeezed to obtain SW sample and were further distilled to obtain DW. The SW and DW samples were analyzed for 3T concentration, 2D/1H and 18O/16O. After detailed discussion on the vertical profiles of the data, we concluded:SW in the shallow layer is typical water retained by the sphagnum tissue; in the shallow layer, freezing and evaporation processes affect the isotopic composition of SW and DW, respectively; in the deep layer, humification and adsorption affect that of both SW and DW with adsorption being more important in DW. It is concluded that the extraction of information on both temperature and humidity of the past from water is impossible, but that the isotopic data of SW may possess the information of climate, as the extent of humification depends on climate during the first burial stage.
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Research Products
(5 results)
