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    Modelling calving front dynamics using a level-set method: application to Jakobshavn Isbræ, West Greenland, links model results in MATLAB format (2016)
    PANGAEA
    In:  Supplement to: Bondzio, Johannes H; Seroussi, Hélène; Morlighem, Mathieu; Kleiner, Thomas; Rückamp, Martin; Humbert, Angelika; Larour, Eric Y (2016): Modelling calving front dynamics using a level-set method: application to Jakobshavn Isbræ, West Greenland. The Cryosphere, 10(2), 497-510, https://doi.org/10.5194/tc-10-497-2016
    Details
    Publication Date: 2023-01-13
    Description: Calving is a major mechanism of ice discharge of the Antarctic and Greenland ice sheets, and a change in calving front position affects the entire stress regime of marine terminating glaciers. The representation of calving front dynamics in a 2-D or 3-D ice sheet model remains non-trivial. Here, we present the theoretical and technical framework for a level-set method, an implicit boundary tracking scheme, which we implement into the Ice Sheet System Model (ISSM). This scheme allows us to study the dynamic response of a drainage basin to user-defined calving rates. We apply the method to Jakobshavn Isbræ, a major marine terminating outlet glacier of the West Greenland Ice Sheet. The model robustly reproduces the high sensitivity of the glacier to calving, and we find that enhanced calving triggers significant acceleration of the ice stream. Upstream acceleration is sustained through a combination of mechanisms. However, both lateral stress and ice influx stabilize the ice stream. This study provides new insights into the ongoing changes occurring at Jakobshavn Isbræ and emphasizes that the incorporation of moving boundaries and dynamic lateral effects, not captured in flow-line models, is key for realistic model projections of sea level rise on centennial timescales.
    Keywords: Jakobshavn_Isbræ_drainage_basin; West Greenland
    Type: Dataset
    Format: application/zip, 469.2 MBytes
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  • 2
    Electronic Resource
    Electronic Resource
    Neutrale Ionophore mit Selektivität für Na⊕ (1983)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 116 (1983), S. 2028-2034 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Neutral Ionophores with Selectivity for Na⊕New non-macrocyclic, electrically neutral ionophores 5-9 are described. In membranes they induce selectivities of Na⊕ over K⊕ by a factor of up to 20.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19831160529
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Neue neutrale Ionophore mit hoher Selektivität für Ba2+ (1985)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 118 (1985), S. 1071-1077 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: New Neutral Ionophores with High Ba2+ SelectivityThe syntheses and the selectivity coefficients of the new open-chained, electrically neutral ionophores 2-4 are reported. Their lipophilicities and their selectivities in membranes with respect to Ba2+ ions were optimized: 2c and - to a smaller extent - 4 exhibit a remarkable combination of high Ba2+ selectivity and high lipophilicity and are, therefore, attractive for analytical applications.
    Notes: Synthesen und Selektivitätskoeffizienten der neuen offenkettigen, elektrisch neutralen Ionophore 2-4 werden mitgeteilt. Ihre Lipophilien und Selektivitäten für Ba2+ -Ionen in Membranen wurden optimiert: 2c und - weniger ausgeprägt - 4 zeigen eine bemerkenswerte Kombination von hoher Ba2+ -Selektivität und hoher Lipophilie und sind daher für analytische Anwendungszwecke attraktiv.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19851180324
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    Paper (German National Licenses)
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