pism

[fork] customized build of PISM, the parallel ice sheet model (tillflux branch)
git clone git://src.adamsgaard.dk/pism # fast
git clone https://src.adamsgaard.dk/pism.git # slow
Log | Files | Refs | README | LICENSE Back to index

README.md (2274B)

      1 Antarctica example using SeaRISE-Antarctica data
      2 =========
      3 
      4 The scripts in this directory apply the PISM model to the present-day Antarctic
      5 ice sheet.  The data are from the SeaRISE collaboration, specifically the file
      6 `Antarctica_5km_dev1.0.nc` (105 MB) described at
      7 <http://websrv.cs.umt.edu/isis/index.php/Present_Day_Antarctica>.
      8 
      9 These scripts do not prepare an actual SeaRISE submission.  Some elements of the
     10 modeling strategy in this example is explained in
     11 
     12 * M. A. Martin, R. Winkelmann, M. Haseloff, T. Albrecht, E. Bueler, C. Khroulev, A. Levermann (2011).  _The Potsdam Parallel Ice Sheet Model (PISM-PIK) - Part 2: Dynamic equilibrium simulation of the Antarctic ice sheet_, **The Cryosphere** 5, 727--740. <http://www.the-cryosphere.net/5/727/2011/tc-5-727-2011.pdf>
     13 
     14 Getting and preprocessing the data
     15 ---------
     16 
     17 This script downloads `Antarctica_5km_dev1.0.nc` with `wget` and uses NCO to preprocess to PISM-ready condition:
     18 
     19     $ ./preprocess.sh
     20 
     21 Running the coarse-grid spinup
     22 ---------
     23 
     24 Next look at what the run script will do (i.e. a dry-run):
     25 
     26     $ PISM_DO=echo ./antspin-coarse.sh 4
     27 
     28 Then actually do the run, saving its `stdout` output in a file; this will take a number of processor-hours:
     29 
     30     $ ./antspin-coarse.sh 4 &> out.ant30km
     31 
     32 This is a 30 km grid (the default) run with 4 processes.  The first stage essentially smooths the surface, the second stage improves the enthalpy field (a "no mass continuity" run), and then the third stage uses the "full" physics, which has sliding and PIK calving-front physics.
     33 
     34 Adjust the `antspin-coarse.sh` script to use other grids for this coarse grid stage.
     35 
     36 Regridding to a fine grid to complete the spinup
     37 ---------
     38 
     39 This is a 15 km grid run with 4 processes which continues the above "third" stage using the "full" physics, which has sliding and PIK calving-front physics.
     40 
     41     $ PISM_DO=echo ./antspin-regridtofine.sh 4
     42     $ ./antspin-regridtofine.sh 4 &> out.ant15km
     43 
     44 Adjust the `antspin-regridtofine.sh` script to use other grids for the fine grid stage.
     45 
     46 SeaRISE experiments
     47 ---------
     48 
     49 To perform the actual SeaRISE experiments, see scripts in PISM release `stable0.4`.
     50 Look in `examples/searise-antarctica`.  These scripts will require modifications
     51 to run under more recent versions of PISM.