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Spatial distribution of surface ablation in the terminus of Rhonegletscher, Switzerland

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Title: Spatial distribution of surface ablation in the terminus of Rhonegletscher, Switzerland
Authors: Sugiyama, Shin Browse this author →KAKEN DB
Yoshizawa, Takeshi Browse this author
Huss, Matthias Browse this author
Tsutaki, Shun Browse this author
Nishimura, Daisuke Browse this author
Issue Date: 2011
Publisher: International Glaciological Society
Journal Title: Annals of Glaciology
Volume: 52
Issue: 58
Start Page: 1
End Page: 8
Abstract: The spatial pattern of glacier surface melt was measured with a resolution of 20-100 m within a region extending 1 km up-glacier from the terminus of Rhonegletscher, Switzerland. The melt rate was monitored from 6 July to 6 September 2009 using 44 ablation stakes. We also measured the surface albedo near the stakes to investigate the importance of this parameter for the melt-rate distribution. The melt rate varied from 32.8 to 71.9 mm w.e. d^[-1] in the study area. Our measurements suggest that the spatial variation of the melt rate can be explained by (1) shading of the ice surface by neighbouring mountains, (2) surface albedo and (3) effects of microclimate (e.g. radiation from side-walls) on the surface energy balance. The observed melt-rate distribution was compared to the results of a temperature-index melt model, which takes into account shading of direct solar illumination but not the other two effects. The model reproduces some important features of the field data, but its spatial variations are generally less than the measured values. Our study shows the importance of albedo and other local conditions in the accurate estimation of the small-scale melt-rate distribution.
Rights: © 2011 International Glaciological Society
Relation: http://www.igsoc.org/
Type: article
URI: http://hdl.handle.net/2115/48170
Appears in Collections:低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 杉山 慎

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