Why the continental margin around the Antarctica is deeper than other continental shelves ?
| Project/Area Number |
23501255
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Geography
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| Research Institution | National Institute of Polar Research |
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Principal Investigator |
OKUNO Jun'ichi 国立極地研究所, 北極観測センター, 特任研究員 (00376542)
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| Co-Investigator(Kenkyū-buntansha) |
MIURA Hideki 国立極地研究所, 研究教育系, 助教 (10271496)
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2011: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | 南極氷床 / 地形 / 第四紀 / 氷床変動 / 地殻変動 / 海水準変動 / 地球変形 / 南極 / 大陸棚 / 海底地形 |
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| Research Abstract |
The growth and decay history of Antarctic ice sheet affected geographic formation of the Antarctica including its margin through the Cenozoic era. The depth of the continental shelf around the Antarctica is very deep in comparison with that of the other sea areas in the world. The reason why continental shelf of Antarctica is very deep is that the Antarctic ice sheet would depress the continent including the continental shelf. Based on the glacial isostatic adjustment (GIA) modelling, we estimate the effect of the Antarctic ice load on the depth of the continental shelf around the Antarctica. GIA modelling results show that deformation due to the present ice distribution cannot satisfy the anomaly of the continental shelf depths in this region. However, the results based on the ice load model including the last glacial cycle explain the depth around the Antarctica, and imply that the Antarctic ice sheet extent to continental shelf at the Last Glacial Maximum.
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Report
(4 results)
Research Products
(38 results)
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[Journal Article] Initiation of the Changjiang (Yangtze) delta and its response to the mid-Holocene sea level change2013
Author(s)
B.Song, Z.Li, Y.Saito, J.Okuno, Z.Li, A.Lu, D.Hua, J.Li, Y.Li, R.Nakashima
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Journal Title
Palaeogeography, Palaeoclimatology, Palaeoecology
Volume: 388
Pages: 81-97
DOI
Related Report
Peer Reviewed
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[Journal Article] Formation and fate of sedimentary depocentres on Southeast Asia's Sund a Shelf over the past sea-level cycle and biogeographic implications2011
Author(s)
Hanebuth, T.J.J., Voris, H., K., Yokoyama, Y., Saito, Y., Okuno, J.
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Journal Title
Earth-Science Reviews
Volume: 104
Issue: 1-3
Pages: 92-110
DOI
Related Report
Peer Reviewed
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