2013 Fiscal Year Final Research Report
An experimental study on cyclic steps aiming for elucidation of the Mars' climate history
| Project/Area Number |
24654165
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Geology
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| Research Institution | Osaka Institute of Technology |
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Principal Investigator |
YOKOKAWA Miwa 大阪工業大学, 情報科学部, 教授 (30240188)
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| Co-Investigator(Kenkyū-buntansha) |
IZUMI Norihiro 北海道大学, 工学研究院, 教授 (10260530)
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| Research Collaborator |
HUGHES CLARKE John E. ニューブランズウイック大学, 測地工学部, 教授
GREVE Ralf 北海道大学, 低温科学研究所, 教授
YAMADA Tomohito 北海道大学, 工学研究院, 准教授 (10554959)
NAITO Kensuke 北海道大学, 工学研究院, 院生
SUMIDA Takashi 北海道大学, 工学研究院, 院生
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | 惑星地質学 / サイクリックステップ / 火星北極冠 / スパイラルトラフ / アナログ実験 / 界面波 / 混濁流 / 安定解析 |
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| Research Abstract |
"Spiral troughs" (cyclic step topography) observed at the upper part of Mars' north polar ice cap is considered to be closely related to the formation history of the npc and thus the climate history of Mars. In order to explore the formation mechanism of this step topography, we operated analog experiments using ice. We also did the other experiment of cyclic steps by the gravity flows analogue to the sediment waves in the deep sea environments whose internal structures are resemble to those of spiral troughs on Mars. A theoretical model of interfacial wave formation between the fluid and ice is also created. In the analog experiments, we have succeeded in forming a interfacial waves that develop at the interface between the fluid and the ice by the flow in upper flow-regime. Behavior of these steps was consistent with that predicted by the theoretical model.
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[Presentation] Antidunes and cyclic steps in open channels : their formative conditions and the geometrical features2014
Author(s)
Yokokawa, M., Takahashi, Y., Yamamura, H., Kishima, Y., Parker, G., Izumi, N.
Organizer
European Geoscience Union, 2014 General Assembly
Place of Presentation
オーストリア,ウイーン
Year and Date
2014-04-28
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[Presentation] R.,Experiments of"cyclic steps"on the ice surface.8th International Symposium on River2013
Author(s)
Yokokawa, M., Izumi, N., Naito, K., Yamada, T., Greve
Organizer
Coastal and Estuarine Morphodynamics (RECM2013)
Place of Presentation
スペイン,カンタブリア大学
Year and Date
2013-06-12
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[Presentation] Analog experiments on the formation of spiral troughs on the North Polar Ice cap of Mars : Layered deposits emplaced by cyclic steps on Ice2012
Author(s)
Yokokawa, M., Izumi, N., Naito, K., Shimizu, H., Yamada, T., Greve, R.
Organizer
American Geophysical Union, 2012 Fall Meeting
Place of Presentation
アメリカ合衆国,サンフランンスコ
Year and Date
2012-12-03
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