World Library  


Add to Book Shelf
Flag as Inappropriate
Email this Book

Century-scale Simulations of the Response of the West Antarctic Ice Sheet to a Warming Climate : Volume 9, Issue 2 (23/03/2015)

By Cornford, S. L.

Click here to view

Book Id: WPLBN0004023181
Format Type: PDF Article :
File Size: Pages 56
Reproduction Date: 2015

Title: Century-scale Simulations of the Response of the West Antarctic Ice Sheet to a Warming Climate : Volume 9, Issue 2 (23/03/2015)  
Author: Cornford, S. L.
Volume: Vol. 9, Issue 2
Language: English
Subject: Science, Cryosphere, Discussions
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2015
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

APA MLA Chicago

Van Den Broeke, M. R., Cornford, S. L., M. Ligtenber, S. R., Timmermann, R., Edwards, T. L., Vaughan, D. G.,...Krinner, G. (2015). Century-scale Simulations of the Response of the West Antarctic Ice Sheet to a Warming Climate : Volume 9, Issue 2 (23/03/2015). Retrieved from http://nook-library.net/


Description
Description: Centre for Polar Observation and Modelling, School of Geographical Sciences, University of Bristol, Bristol, BS8 1SS, UK. We use the BISICLES adaptive mesh ice sheet model to carry out one, two, and three century simulations of the fast-flowing ice streams of the West Antarctic Ice Sheet. Each of the simulations begins with a geometry and velocity close to present day observations, and evolves according to variation in meteoric ice accumulation, ice shelf melting, and mesh resolution. Future changes in accumulation and melt rates range from no change, through anomalies computed by atmosphere and ocean models driven by the E1 and A1B emissions scenarios, to spatially uniform melt rates anomalies that remove most of the ice shelves over a few centuries. We find that variation in the resulting ice dynamics is dominated by the choice of initial conditions, ice shelf melt rate and mesh resolution, although ice accumulation affects the net change in volume above flotation to a similar degree. Given sufficient melt rates, we compute grounding line retreat over hundreds of kilometers in every major ice stream, but the ocean models do not predict such melt rates outside of the Amundsen Sea Embayment until after 2100. Sensitivity to mesh resolution is spurious, and we find that sub-kilometer resolution is needed along most regions of the grounding line to avoid systematic under-estimates of the retreat rate, although resolution requirements are more stringent in some regions – for example the Amundsen Sea Embayment – than others – such as the Möller and Institute ice streams.

Summary
Century-scale simulations of the response of the West Antarctic Ice Sheet to a warming climate

Excerpt
Agosta, C., Favier, V., Krinner, G., Gallée, H., Fettweis, X., and Genthon, C.: High-resolution modelling of the Antarctic surface mass balance, application for the twentieth, twenty first and twenty second centuries, Clim. Dynam., 41, 3247–3260, doi:10.1007/s00382-013-1903-9, 2013.; Arthern, R. J. and Gudmundsson, G. H.: Initialization of ice-sheet forecasts viewed as an inverse Robin problem, J. Glaciol., 56, 527–533, doi:10.3189/002214310792447699, 2010.; Asay-Davis, X. S., Martin, D. F., Collins, W. D., Cornford, S. L., Holland, D. M., Lipscomb, W. H., Maltrud, M., Ng, E. G., and Price, S. F.: The POPSICLES v. 0.4 coupled ocean-ice sheet model, in preparation, 2015.; Borstad, C. P., Khazendar, A., Larour, E., Morlighem, M., Rignot, E., Schodlok, M. P., and Seroussi, H.: A damage mechanics assessment of the Larsen B ice shelf prior to collapse: toward a physically-based calving law: a calving law based on damage mechanics, Geophys. Res. Lett., 39, L18502, doi:10.1029/2012GL053317, 2012.; Connolley, W. M. and Bracegirdle, T. J.: An Antarctic assessment of IPCC AR4 coupled models, Geophys. Res. Lett., 34, L22505, doi:10.1029/2007GL031648, 2007.; Hansen, P. C.: Regularization tools: a Matlab package for analysis and solution of discrete ill-posed problems, Numer. Algorithms, 6, 1–35, 1994.; Cornford, S. L., Martin, D. F., Graves, D. T., Ranken, D. F., Le Brocq, A. M., Gladstone, R. M., Payne, A. J., Ng, E. G., and Lipscomb, W. H.: Adaptive mesh, finite volume modeling of marine ice sheets, J. Comput. Phys., 232, 529–549, doi:10.1016/j.jcp.2012.08.037, 2013.; Durand, G., Gagliardini, O., Zwinger, T., Le Meur, E., and Hindmarsh, R. C.: Full Stokes modeling of marine ice sheets: influence of the grid size, Ann. Glaciol., 50, 109–114, doi:10.3189/172756409789624283, 2009.; Dutrieux, P., Vaughan, D. G., Corr, H. F. J., Jenkins, A., Holland, P. R., Joughin, I., and Fleming, A. H.: Pine Island glacier ice shelf melt distributed at kilometre scales, The Cryosphere, 7, 1543–1555, doi:10.5194/tc-7-1543-2013, 2013.; Dutrieux, P., De Rydt, J., Jenkins, A., Holland, P. R., Ha, H. K., Lee, S. H., Steig, E. J., Ding, Q., Abrahamsen, E. P., and Schroder, M.: Strong sensitivity of Pine Island Ice-Shelf melting to climatic variability, Science, 343, 174–178, doi:10.1126/science.1244341, 2014.; Favier, L., Durand, G., Cornford, S. L., Gudmundsson, G. H., Gagliardini, O., Gillet-Chaulet, F., Zwinger, T., Payne, A. J., and Le Brocq, A. M.: Retreat of Pine Island Glacier controlled by marine ice-sheet instability, Nat. Clim. Change, 4, 117–121, doi:10.1038/nclimate2094, 2014.; Gagliardini, O., Durand, G., Zwinger, T., Hindmarsh, R. C. A., and Le Meur, E.: Coupling of ice-shelf melting and buttressing is a key process in ice-sheets dynamics, Geophys. Res. Lett., 37, L14501, doi:10.1029/2010GL043334, 2010.; Goldberg, D. N. and Sergienko, O. V.: Data assimilation using a hybrid ice flow model, The Cryosphere, 5, 315–327, doi:10.5194/tc-5-315-2011, 2011.; Fretwell, P., Pritchard, H. D., Vaughan, D. G., Bamber, J. L., Barrand, N. E., Bell, R., Bianchi, C., Bingham, R. G., Blankenship, D. D., Casassa, G., Catania, G., Callens, D., Conway, H., Cook, A. J., Corr, H. F. J., Damaske, D., Damm, V., Ferraccioli, F., Forsberg, R., Fujita, S., Gim, Y., G

 

Click To View

Additional Books


  • Grain Shape Influence on Light Extinctio... (by )
  • Effect of Higher-order Stress Gradients ... (by )
  • Analysis of Long-term Precipitation Patt... (by )
  • Sea Ice Cover in Isfjorden and Hornsund ... (by )
  • Ice Tectonics During the Rapid Tapping o... (by )
  • Effects of Nonlinear Rheology, Temperatu... (by )
  • Limitations of a Coupled Regional Climat... (by )
  • Application of Asymptotic Radiative Tran... (by )
  • Vertical Profiles of the Specific Surfac... (by )
  • A Simple Inverse Method for the Distribu... (by )
  • Monitoring Water Accumulation in a Glaci... (by )
  • Tectonic and Oceanographic Controls on A... (by )
Scroll Left
Scroll Right

 



Copyright © World Library Foundation. All rights reserved. eBooks from Nook eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.