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A theoretical approach to glacier equilibrium-line altitudes using meteorological data and glacier massbalance

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Show simple item record Lie, Øyvind en_US Dahl, Svein Olaf en_US Nesje, Atle en_US 2004-08-10T10:39:27Z en_US 2004-08-26T11:57:35Z 2004-08-10T10:39:27Z en_US 2004-08-26T11:57:35Z 2003-05-01 en_US
dc.identifier.citation The Holocene 13(3): 365–372 en_US
dc.identifier.issn 0959-6836 en_US
dc.identifier.issn 1477-0911
dc.description.abstract Based on a close exponential relationship between mean ablation-season temperature and winter precipitation at the equilibrium-line altitude (ELA) of 10 Norwegian glaciers, three equations are derived. The first equation enables calculation of the minimum altitude of areas climatically suited for glacier formation, and is termed the altitude of instantaneous glacierization (AIG). Equation (2) is derived based on the ‘principle of terrain adaptation’, enabling quantification of the glacial buildup sensitivity (GBS) in presently non-glaciated areas. The theoretical climatic temperature-precipitation ELA (CTP-ELA) in presently non-glaciated areas is calculated in equation three by combining GBS with terrain altitude. Mass-balance records from four modern glaciers (Ålfotbreen, Nigardsbreen, Storbreen and Gråsubreen) situated in maritime to continental climate regimes in southern Norway are used to test these equations. Correlation between AIG and net balance measurements (bn) yielded correlation coefficients of r = –0.80 to r = –0.84. Calculated AIGs correspond well with observed ELAs on Ålfotbreen, Nigardsbreen and Gråsubreen, while it deviates from the observed ELA on Storbreen; the latter is probably due to leeward accumulation of wind-blown snow on this cirque glacier. Based on this approach, regional representative climatic ELAs can be calculated for non-glaciated areas with instrumental records of ablation-season temperature and winter precipitation. en_US
dc.format.extent 536149 bytes en_US
dc.format.extent 45393 bytes
dc.format.extent 137 bytes
dc.format.extent 536149 bytes
dc.format.mimetype application/pdf en_US
dc.format.mimetype text/plain
dc.format.mimetype text/plain
dc.format.mimetype application/pdf
dc.language.iso eng en_US
dc.publisher Arnold en
dc.rights Copyright Arnold 2003
dc.title A theoretical approach to glacier equilibrium-line altitudes using meteorological data and glacier massbalance en_US
dc.type Journal article eng
dc.type.version publishedVersion eng
bora.peerreviewed Peer reviewed eng
bora.journalTitle The Holocene
bibo.volume 13
bibo.issue 3
bibo.pageStart 365
bibo.pageEnd 372

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