Permafrost, Ground Ice, and Soils Database in Japan
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Transcript of Permafrost, Ground Ice, and Soils Database in Japan
Permafrost, Ground Ice, and Soils Database in Japan
Compiled by Norikazu Matsuoka (University of Tsukuba)
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Sør Rondane Mountains
Thiel Mountains
Ellesworth Mountains
Prince Olav Coast
Riiser-Larsen Mts.,Enderby Land
East Ongul Island(Syowa Station)
James Ross Island
Seymour Island
Periglacial Research Sitesby Japanese Scientists
Blue: Coastal sitesRed: Inland sites
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Sør Rondane Mountains
Thiel Mountains
Ellesworth Mountains
Prince Olav Coast
Riiser-Larsen Mts.,Enderby Land
East Ongul Island(Syowa Station)
James Ross Island
Seymour Island
Japanese Antarctic Research Expedition
(1956-)
Antarctic Walk Environmental Research Expedition (1991-1993)
Japan-ArgentinaJoint Team (1987-)
Periglacial Research Sitesby Japanese Scientists
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Ground Temperature
ALT 15 cmMAGT -20 to -22 ˚C
ALT 60 cmMAGT -10˚C
ALT >80 cmMAGT ~-10˚C
ALT 100- 120 cmMAGT -4 to -7 ˚C
ALT 65 cmMAGT -7˚C
ALT 8- 40 cmMAGT -17 ˚C
ALT 50- 130 cmMAGT -3 to -7˚C
ALT: Active Layer ThicknessMAGT: Mean Annual Ground Temperature
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Major permafrost features
Large sorted circles
Rock glaciers
Ice wedge polygons
Rock glaciers
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Frost heave: max. 20 mm(seasonal)
Frost heave: max. 10 mm(mainly diurnal)
Solifluction :no movement
Frost heave: <2 mm (diurnal)Frost creep: <1.5 cm/yr <17 cm deep• Only at humid sites
SolifluctionRock glacier creep
Monitoring ofPeriglacial Processes
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Rock Weathering & Soils
Chemistry of weathered rocks and varnish
Soil: Profile, Granulometry,Mineralogy, SaltsRock: Chemistry of varnish,Weathering index, Salts
Contacts (Data Reporters):
• Antarctic Peninsula (Seymour & James Ross)Dr. T. Sone (Hokkaido University)
• Ellsworth Mountains & Polar PlateauDr. K. Yoshikawa (Univ. Alaska-Fairbanks)
• Enderby LandDr. H. Miura (National Institute of Polar Research)
• Prins Olav Coast (Japanese Main Base)Dr. T. Sawagaki (Hokkaido Univ.)
• Sør Rondane MountainsDr. N. Matsuoka (Univ. Tsukuba)