Geomorphological Results of the Japanese Expedition to Svalbard, 1988-1989

Ono, Yugo; Matsuoka, Norikazu; Sawaguchi, Shin-ichi; Shimokawa, Kuniyasu; Fukuda, Masami; Takahashi, Nobuyuki; Shiraiwa, Takayuki; Hasegawa, Yohei; Yoshikawa, Kenji; Muto, Harutatsu

doi:10.2307/3673619

Cited by 4 publications

(2 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Polygons of various sizes have developed both on river terraces along Adventelva and on the hill slopes. Ice wedges were found beneath some of the polygons (Svensson 1988;Ono et al 1991) and some pingos were present on the riverbed. Few direct measurements of the permafrost thickness have been made in this area.…”

Section: The Study Areamentioning

confidence: 99%

Landslides and relict ice margin landforms in Adventdalen, central Spitsbergen, Svalbard

Sawagaki

Koaze

1996

Polar Research

View full text Add to dashboard Cite

Two characteristic landforms, landslide blocks and drainage channels, were investigated in Adventdalen, central Spitsbergen. The landslides in the middle reaches of Adventdalen comprise large‐scale bedrock slumps which form a hummocky surface on the south slope of Arctowskifjellet. The fourteen recognized landslide blocks are divided into upper and lower sections, according to altitude. The drainage channels consist of tributary rivers to Adventelva which flow in two distinct directions, either parallel with or oblique to the direction of the main river. Glacial deposits were found to cover the ridges between these tributary channels. The upper and lower landslide divisions may indicate former positions of the ice surface, and the channels appear to have originated during the existence of lateral moraine ridges with high ice content. These geomorphological findings have allowed reconstruction of former ice marginal positions, and they strongly suggest the existence of stagnant ice or minor re‐advance phases during the course of deglaciation in Adventdalen.

show abstract

Section: The Study Areamentioning

confidence: 99%

Landslides and relict ice margin landforms in Adventdalen, central Spitsbergen, Svalbard

Sawagaki

Koaze

1996

Polar Research

View full text Add to dashboard Cite

show abstract

“…The topics involved rock weathering (Matsuoka 1991), rock slides (Sawagaki and Koaze 1996), soil slope processes (Sawaguchi , 1995Matsuoka and Hirakawa 2000), snow action (Shimokawa 1991), wind action (Umemoto 1993), frost mounds (Ono et al 1991;Yoshikawa 1993;Yoshikawa and Harada 1995;Yoshikawa and Nakamura 1996) and ice-wedge polygons Ma tsuoka 1999). However, there was no compre hensive report in English, since these results were published in individual papers and some were written in Japanese.…”

mentioning

confidence: 99%

Present-Day Periglacial Environments in Central Spitsbergen, Svalbard

Matsuoka¹,

Sawaguchi²,

Yoshikawa³

2004

Geogr. Rev. JPN, Chirigaku Hyoron

Self Cite

View full text Add to dashboard Cite

This report overviews observations on periglacial geomorphology in central Spits bergen, which have been undertaken by the Japanese geomorphological groups. Focus is given to permafrost-related processes, including solifluction, thermal contraction cracking and pingo growth. Annual freeze-thaw action dominates the ground, resulting in extensive occurrence of solifluction and shallow landslides on soil slopes. Solifluction shows low surface velocity but large volumetric transport, which respectively reflects infrequent diurnal frost creep and deep movement. The latter partly originates from plug-like flow in the basal active layer, where permafrost temperature is low and muddy sediment is thick. Non-sorted polygons with a wide range of diameters develop on lowlands. In colder inland terrains, large polygons (>7 m) have ice wedges, whereas smaller polygons have only soil wedges or cracks confined to the active layer. Significant ice-wedge cracking occurs during rapid and intensive cooling in midwinter. In warmer coastal terrains, ice wedges are not common even below large polygons, because higher winter temperature can produce only shallow cracks. Open-system pingos occur in valley bottoms and near shores. Some pingos are still growing under a low artesian pressure fed by constant supply of sub-permafrost water. Following lateral river erosion, a new frost mound emerged at a side of a pingo, reaching 3 m high during three years. The observations demonstrate that central Spitsbergen is situated in a High Arctic but relatively warm perma frost environment. The transitional condition between cold and warm permafrost allows diverse periglacial features to coexist within a small area. Even minor climatic change can switch the two thermal regimes, affecting significantly the type and magnitude of periglacial processes.

show abstract

Ice-wedge polygons and solifluction in the Adventdalen area, Spitsbergen, Svalbard

Sørbel¹,

Tolgensbakk²

2002

Norsk Geografisk Tidsskrift - Norwegian Journal of Geography

View full text Add to dashboard Cite

Geomorphological Results of the Japanese Expedition to Svalbard, 1988-1989

Cited by 4 publications

References 10 publications

Landslides and relict ice margin landforms in Adventdalen, central Spitsbergen, Svalbard

Landslides and relict ice margin landforms in Adventdalen, central Spitsbergen, Svalbard

Present-Day Periglacial Environments in Central Spitsbergen, Svalbard

Ice-wedge polygons and solifluction in the Adventdalen area, Spitsbergen, Svalbard

Contact Info

Product

Resources

About