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Andy Aschwanden
Researcher at University of Alaska Fairbanks
Publications - 45
Citations - 2723
Andy Aschwanden is an academic researcher from University of Alaska Fairbanks. The author has contributed to research in topics: Ice sheet & Ice-sheet model. The author has an hindex of 23, co-authored 39 publications receiving 2046 citations. Previous affiliations of Andy Aschwanden include ETH Zurich & University of Alaska System.
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An enthalpy formulation for glaciers and ice sheets
TL;DR: In this article, a unified enthalpy formulation for the three dimensional ice fluid, for the surface runoff layer and for the subglacial hydrology layer, together in a single energy-conserving theoretical framework is presented.
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Benchmark experiments for higher-order and full-Stokes ice sheet models (ISMIP-HOM).
Frank Pattyn,Laura Perichon,Andy Aschwanden,B. Breuer,B. de Smedt,Olivier Gagliardini,G. H. Gudmundsson,Richard C. A. Hindmarsh,Alun Hubbard,Jesse V. Johnson,Thomas Kleiner,Y. Konovalov,Carlos Martín,Antony J. Payne,David Pollard,Stephen Price,Martin Rückamp,Fuyuki Saito,Ondřej Souček,Shin Sugiyama,Thomas Zwinger +20 more
TL;DR: In this article, the results of the first intercomparison project for higher-order and full-Stokes ice sheet models are compared and verified in a series of six experiments of which one has an analytical solution obtained from a perturbation analysis.
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Ice-sheet model sensitivities to environmental forcing and their use in projecting future sea level (the SeaRISE project)
Robert Bindschadler,Sophie Nowicki,Ayako Abe-Ouchi,Andy Aschwanden,Hyeungu Choi,James L. Fastook,Glen Granzow,Ralf Greve,Gail Gutowski,Ute Christina Herzfeld,Charles S. Jackson,Jesse V. Johnson,Constantine Khroulev,Anders Levermann,William H. Lipscomb,Maria A. Martin,Mathieu Morlighem,B. R. Parizek,David Pollard,Stephen Price,Diandong Ren,Fuyuki Saito,Tatsuru Sato,Hakime Seddik,Helene Seroussi,Kunio Takahashi,R. T. Walker,Wei Li Wang +27 more
TL;DR: In this article, the authors used ten models to study the sensitivity of the Greenland and Antarctica ice sheets to prescribed changes of surface mass balance, sub-ice-shelf melting and basal sliding, and found that Greenland is more sensitive than Antarctica to likely atmospheric changes in temperature and precipitation.
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Contribution of the Greenland Ice Sheet to sea level over the next millennium
Andy Aschwanden,Mark Fahnestock,Martin Truffer,Douglas J. Brinkerhoff,Regine Hock,Constantine Khroulev,Ruth Mottram,S. Abbas Khan +7 more
TL;DR: It is found that Greenland could contribute 5 to 33 cm to sea level by 2100, with discharge from outlet glaciers contributing 8 to 45% of total mass loss.
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Greenland ice sheet mass balance: a review
Shfaqat Abbas Khan,Andy Aschwanden,Anders A. Bjørk,John Wahr,Kristian K. Kjeldsen,Kurt H. Kjær +5 more
TL;DR: The mass loss of different sectors is revisited and it is shown that they manifest quite different sensitivities to atmospheric and oceanic forcing and recent progress in constructing coupled ice-ocean-atmosphere models required to project realistic future sea-level changes is discussed.