{"indexed":{"date-parts":[[2018,4,13]],"date-time":"2018-04-13T16:22:24Z","timestamp":1523636544687},"reference-count":0,"publisher":"Cambridge University Press (CUP)","issue":"73","content-domain":{"domain":[],"crossmark-restriction":false},"published-print":{"date-parts":[[2016,9]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n            <jats:p>At least in conventional hydrostatic ice-sheet models, the numerical error associated with grounding line dynamics can be reduced by modifications to the discretization scheme. These involve altering the integration formulae for the basal traction and\/or driving stress close to the grounding line and exhibit lower \u2013 if still first-order \u2013 error in the MISMIP3d experiments. MISMIP3d may not represent the variety of real ice streams, in that it lacks strong lateral stresses, and imposes a large basal traction at the grounding line. We study resolution sensitivity in the context of extreme forcing simulations of the entire Antarctic ice sheet, using the BISICLES adaptive mesh ice-sheet model with two schemes: the original treatment, and a scheme, which modifies the discretization of the basal traction. The second scheme does indeed improve accuracy \u2013 by around a factor of two \u2013 for a given mesh spacing, but <jats:inline-formula>\n                  <jats:alternatives>\n                     <jats:inline-graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" mime-subtype=\"gif\" xlink:href=\"S0260305516000136_inline1\" xlink:type=\"simple\" \/>\n                     <jats:tex-math>$\\lesssim 1$<\/jats:tex-math>\n                  <\/jats:alternatives>\n               <\/jats:inline-formula> km resolution is still necessary. For example, in coarser resolution simulations Thwaites Glacier retreats so slowly that other ice streams divert its trunk. In contrast, with <jats:inline-formula>\n                  <jats:alternatives>\n                     <jats:inline-graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" mime-subtype=\"gif\" xlink:href=\"S0260305516000136_inline2\" xlink:type=\"simple\" \/>\n                     <jats:tex-math>$\\lesssim 1$<\/jats:tex-math>\n                  <\/jats:alternatives>\n               <\/jats:inline-formula> km meshes, the same glacier retreats far more quickly and triggers the final phase of West Antarctic collapse a century before any such diversion can take place.<\/jats:p>","DOI":"10.1017\/aog.2016.13","type":"article-journal","created":{"date-parts":[[2016,5,13]],"date-time":"2016-05-13T07:13:37Z","timestamp":1463123617000},"page":"1-9","source":"Crossref","is-referenced-by-count":4,"title":"Adaptive mesh refinement versus subgrid friction interpolation in simulations of Antarctic ice dynamics","prefix":"10.3189","volume":"57","author":[{"given":"S. L.","family":"Cornford","affiliation":[]},{"given":"D. F.","family":"Martin","affiliation":[]},{"given":"V.","family":"Lee","affiliation":[]},{"given":"A. J.","family":"Payne","affiliation":[]},{"given":"E. G.","family":"Ng","affiliation":[]}],"member":"56","published-online":{"date-parts":[[2016,5,13]]},"container-title":"Annals of Glaciology","original-title":[],"link":[{"URL":"https:\/\/www.cambridge.org\/core\/services\/aop-cambridge-core\/content\/view\/S0260305516000136","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2017,10,25]],"date-time":"2017-10-25T16:45:32Z","timestamp":1508949932000},"score":1.0,"subtitle":[],"short-title":[],"issued":{"date-parts":[[2016,5,13]]},"references-count":0,"alternative-id":["S0260305516000136"],"URL":"http:\/\/dx.doi.org\/10.1017\/aog.2016.13","relation":{},"ISSN":["0260-3055","1727-5644"],"subject":["Earth-Surface Processes"],"container-title-short":"Ann. Glaciol."}