The Structure of a Temperate Glacier

Seligman, G.

doi:10.2307/1787399

Cited by 34 publications

(29 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…flow.1 0 The strain rate became detectable at approximately 10 m. depth and increased rapidly at depths exceeding 30 m. These values are those set forth by Orowan 9 in his assumption of the yield stress of ice and by Seligman 13 in his work on the depth of crevasses.…”

Section: Contraction Of Tunnel Sectionsmentioning

confidence: 74%

“…Since this situation persisted in August and was present again in December, the assumption that the temperature there never quite came up to 0 0 C. throughout the past year seems a reasonable one. 13 ,18 The inner zone of 0 0 C. was distinguished by water inflows and numerous puddles on the tunnel flo or, puddles which were found and remained unfrozen in December. A relatively small decrease in temperature was noted in the transition from the ice to one of the small isolated air gapS' between the ice and rock-bed.…”

Section: Temperaturesmentioning

confidence: 99%

See 1 more Smart Citation

The Internal Structure of a Cirque Glacier: Report on Studies of the Englacial Movements and Temperatures

McCall¹

1952

J. Glaciol.

View full text Add to dashboard Cite

ABSTRACT. This report is of a preliminary nature; detailed analyses are being carried on at the present time. The tunnel project on a small cirque glacier in the Jotunheim area of Norway, made possible observations of englacial movements in August and December of 1951 which are correlated with surface movements. Emphasis was placed on detailed three-dimensional studies. A marked divergence of flow lines was noted in both the vertical and horizontal planes. Bands previously thought to be thrust planes were found to be of sedimentary origin and not to be discrete planes of shear. Rates of contractions of tunnel sections up to a depth of 50 m . were observed and the englacial temperature distributions were taken in both zones of ablation and accumulation .

show abstract

Section: Contraction Of Tunnel Sectionsmentioning

confidence: 74%

Section: Temperaturesmentioning

confidence: 99%

The Internal Structure of a Cirque Glacier: Report on Studies of the Englacial Movements and Temperatures

McCall¹

1952

J. Glaciol.

View full text Add to dashboard Cite

show abstract

“…According to Colbeck and others (1978), the initial grain-size has a significant effect on the densification rate of wet snow; therefore it was determined in the light of the observed grain-size of firn in temperate glaciers and per ennial snow patches. Many measurements of grain-size distribution in temperate firn showed that the diameter of ice grain did not usually exceed 2 mm (Seligman, 1941;Vallon and others, 1976;Kawamura and others, 1989). Thin sections of snow samples used for the tests were made to measure the initial grain-size (area-equivalent diameter) distribution.…”

Section: Methodsmentioning

confidence: 99%

Experimental studies on the transformation from firn to ice in the wet-snow zone of temperate glaciers

Kawashima¹,

Yamada²

1997

Ann. Glaciol.

View full text Add to dashboard Cite

The densification of water-saturated firn, which had formed just above the firn-ice transition in the wet-snow zone of temperate glaciers, was investigated by compression tests under pressures ranging from 0.036 to 0.173 MPa, with special reference to the relationship between densification rate, time and pressure. At each test, the logarithm of the densification rate was proportional to the logarithm of the time, and its proportionality constant increased exponentially with increasing pressure. The time necessary for ice formation in the firn aquifer was calculated using the empirical formula obtained from the tests. Consequently, the necessary time decreased exponentially as the pressure increased, which shows that the transformation from firn in ice can be completed within the period when the firn aquifer exists, if the overburden pressure acting on the water-saturated firn is above 0.12–0.14 MPa. This critical value of pressure was in good agreement with the overburden pressure obtained from depth–density curves of temperate glaciers. It was concluded that the depth of firn–ice transition was self-balanced by the overburden pressure to result in the concentration between 20 and 30 m.

show abstract

“…The British seem to practice this with particular success. Take, for example, Gerald Seligman's (1941) Jungfraujoch research program in glaciology, which enlisted the talents of Nobel laureate-to-be Max Perutz (Perutz & Seligman 1939), among others. Similar results attended a program of field research on the Austerdalsbrea in Norway, which led to major glaciological contributions from British physicists John Nye (1952Nye ( , 1960Nye ( , 1963 of Bristol and John Glen (1955Glen ( , 1956) of Birmingham.…”

Section: Pedagogical Value Of Fiem Workmentioning

confidence: 99%

Earth Science Field Work: Role and Status

Sharp¹

1988

Annu. Rev. Earth Planet. Sci.

View full text Add to dashboard Cite

The Structure of a Temperate Glacier

Cited by 34 publications

References 0 publications

The Internal Structure of a Cirque Glacier: Report on Studies of the Englacial Movements and Temperatures

The Internal Structure of a Cirque Glacier: Report on Studies of the Englacial Movements and Temperatures

Experimental studies on the transformation from firn to ice in the wet-snow zone of temperate glaciers

Earth Science Field Work: Role and Status

Contact Info

Product

Resources

About