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Surface Heat Balance and Spatially Distributed Ablation Modelling at Koryto Glacier, Kamchatka Peninsula, Russia

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Title: Surface Heat Balance and Spatially Distributed Ablation Modelling at Koryto Glacier, Kamchatka Peninsula, Russia
Authors: Konya, Keiko1 Browse this author
Matsumoto, Takane Browse this author
Naruse, Renji Browse this author
Authors(alt): 紺屋, 恵子1
Keywords: maritime glacier
heat balance
distributed ablation model
Koryto Glacier
Kamchatka Peninsula
Issue Date: Dec-2004
Publisher: Blackwell Publishing
Journal Title: Geografiska Annaler: Series A, Physical Geography
Volume: 86
Issue: 4
Start Page: 337
End Page: 348
Publisher DOI: 10.1111/j.0435-3676.2004.00236.x
Abstract: To investigate the characteristics of ablation at Koryto Glacier, a mountain glacier under maritime climate in Kamchatka Peninsula, Russia, we made field observations from August to early September 2000. At a site near the equilibrium line, the 31-day average net radiation, sensible heat flux, and latent heat flux were 43, 59 and 31 W-2, respectively. We developed a new distributed ablation model, which only needs measurements of air temperature and global radiation at one site. Hourly ablation rates at this site obtained by the energy balance method are related to measured air temperature and global radiation by linear multiple regression. A different set of multiple regression coefficients is fitted for snow and ice surfaces. Better estimates of ablation rate can be obtained by this approach than by other temperature index models. These equations are then applied to each grid cell of a digital elevation model to estimate spatially distributed hourly melt. Air temperature is extrapolated using a constant temperature lapse rate and global radiation is distributed considering topographic effects. The model enables us to calculate the hourly spatial distribution of ablation rates within the glacier area and could well provide a realistic simulation of ablation over the whole glacier.
Type: article (author version)
URI: http://hdl.handle.net/2115/4872
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: 紺屋 恵子

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