Results of the third Marine Ice Sheet Model Intercomparison Project (MISMIP+)
- Swansea Univ. (United Kingdom)
- California Institute of Technology (CalTech), Pasadena, CA (United States). Jet Propulsion Lab. (JPL)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Northumbria Univ., Newcastle (United Kingdom)
- British Antarctic Survey, Cambridge (United Kingdom)
- Montana State Univ., Bozeman, MT (United States)
- Alfred Wegener Inst. for Polar and Marine Research, Bremerhaven (Germany)
- Univ. of California, Irvine, CA (United States); Federal Univ. of Rio Grande do Sul, Porto Alegre (Brazil)
- Potsdam Institute for Climate Impact Research, Potsdam (Germany)
- Univ. of Edinburgh, Scotland (United Kingdom)
- Alfred Wegener Inst. for Polar and Marine Research, Bremerhaven (Germany); Univ. of Bremen (Germany)
- National Center for Atmospheric Research, Boulder, CO (United States)
- Univ. of Grenoble (France)
- Univ. of California, Irvine, CA (United States)
- Pennsylvania State Univ., University Park, PA (United States)
We present the result of the third Marine Ice Sheet Model Intercomparison Project, MISMIP+. MISMIP+ is intended to be a benchmark for ice-flow models which include fast sliding marine ice streams and floating ice shelves and in particular a treatment of viscous stress that is sufficient to model buttressing, where upstream ice flow is restrained by a downstream ice shelf. A set of idealized experiments first tests that models are able to maintain a steady state with the grounding line located on a retrograde slope due to buttressing and then explore scenarios where a reduction in that buttressing causes ice stream acceleration, thinning, and grounding line retreat. The majority of participating models passed the first test and then produced similar responses to the loss of buttressing. We find that the most important distinction between models in this particular type of simulation is in the treatment of sliding at the bed, with other distinctions – notably the difference between the simpler and more complete treatments of englacial stress but also the differences between numerical methods – taking a secondary role.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Biological and Environmental Research (BER); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR). Scientific Discovery through Advanced Computing (SciDAC); USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF)
- Grant/Contract Number:
- 89233218CNA000001; AC52-06NA25396; AC02-05CH11231; 1852977
- OSTI ID:
- 1699489
- Report Number(s):
- LA-UR-20-20043
- Journal Information:
- The Cryosphere (Online), Vol. 14, Issue 7; ISSN 1994-0424
- Publisher:
- European Geosciences UnionCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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