| DOI: | 10.5194/tc-9-2135-2015
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| Scopus记录号: | 2-s2.0-84945124939
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| 论文题名: | From Doktor Kurowski's Schneegrenze to our modern glacier equilibrium line altitude (ELA) |
| 作者: | Braithwaite R; J
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| 刊名: | Cryosphere
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| ISSN: | 19940416
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| 出版年: | 2015
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| 卷: | 9, 期:6 | | 起始页码: | 2135
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| 结束页码: | 2148
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| 语种: | 英语
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| 英文关键词: | ablation
; accumulation rate
; altitude
; cryosphere
; equilibrium line
; glacier mass balance
; mountain region
; precipitation (climatology)
; valley glacier
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| 英文摘要: | Translated into modern terminology, Kurowski suggested in 1891 that the equilibrium line altitude (ELA) of a glacier is equal to the mean altitude of the glacier when the whole glacier is in balance between accumulation and ablation. Kurowski's method has been widely misunderstood, partly due to inappropriate use of statistical terminology by later workers, and has only been tested by Braithwaite and Müller in a 1980 paper (for 32 glaciers). I now compare Kurowski's mean altitude with balanced-budget ELA calculated for 103 present-day glaciers with measured surface mass-balance data. Kurowski's mean altitude is significantly higher (at 95 % level) than balanced-budget ELA for 19 outlet and 42 valley glaciers, but not significantly higher for 34 mountain glaciers. The error in Kurowski mean altitude as a predictor of balanced-budget ELA might be due to generally lower balance gradients in accumulation areas compared with ablation areas for many glaciers, as suggested by several workers, but some glaciers have higher gradients, presumably due to precipitation increase with altitude. The relatively close agreement between balanced-budget ELA and mean altitude for mountain glaciers (mean error-8 m with standard deviation 59 m) may reflect smaller altitude ranges for these glaciers such that there is less room for effects of different balance gradients to manifest themselves. © 2015 Author(s). |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/75226
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| Appears in Collections: | 影响、适应和脆弱性
气候变化与战略
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作者单位: | School of Environment, Education and Development (SEED), University of Manchester, Manchester, United Kingdom
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| Recommended Citation: | |
Braithwaite R,J. From Doktor Kurowski's Schneegrenze to our modern glacier equilibrium line altitude (ELA)[J]. Cryosphere,2015-01-01,9(6)
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