The following is metadata information for an archive of model output and code
for an ice-sheet numerical model associated with the paper (henceforth PD2020):

  Pollard, D., and R.M. DeConto. 2020. Improvements in one-dimensional 
  grounding-line parameterizations in an ice-sheet model with lateral 
  variations (PSUICE3D v2.1). In review for Geoscientific Model Develelopment.

A previous set of directories and files was stored earlier in this archive 
for the original version of the paper submitted to Geoscientific Model 
Develelopment Discussions,

  https://doi.org/10.5194/gmd-2020-131

These are all now preserved in the directory "previous-version-2020-05-27",
and the new directories and files for the current paper described here are 
archived as the primary set.

The new files and subdirectories are described below. They are all collected 
in a single zip file for the archive. There are three types of output files: 
fort.92.nc, fort.22, and fort.885.

fort.92.nc are Netcdf-format files with 2-D maps of selected variables at 
regular time intervals through a run. The main variables are:

  alatd, alond    latitudes and longitudes at grid centers.
  h               ice thickness.
  hs              surface elevation (ice, land, or ocean).
  hb              bedrock elevation.
  utop, vtop      surface ice velocities (in x,y directions
                  of the polar stereographic grid).
  maskwater       0 if grounded ice or land, 1 if floating ice or/ocean.
  alatd, alond    grid cell-center latitude, longitude, for the polar 
                  stereographic grid.
  time = years BP (negative) or AP (positive).

fort.22 are tabular ascii files with time series of overall quantities:
column 1 = time, column 16 = total ice volume, column 28 = equivalent sea level
change allowing for ice over flotation. And for MISMIP3d experiments, 
column 29 = total ice over flotation, column 30 = total ocean cavity volume.

fort.885 are tabular ascii files with time series of x-axis positions of the 
grounding line, only for MISMIP+ and MISMIP3d experiments:

column 1 = time, column 2 = position at center-line, column 6 = position
at domain edge.

The subdirectories and files for the current version (collected into a single 
zip file as mentioned above) are:

README_PD2020.txt
-----------------

This file.

RunMISMIP+ 
----------

Contains subdirectories with files fort.92.nc, fort.22 and fort.885
for idealized fjord-like MISMIP+ experiments, with names:

Run_[ctl,1ra,1rr,2ra,2rr]_1_v[0-9]
where ctl = control, 

      1ra to 2rr = MISMIP+ label as in Cornford et al., The Cryosphere, 2020.
      1 = model resolution (all are 1 km).
      v0 = old model version (A = 3.5e-17 Pa-3 a-1) 
      v1 = old model version (A = 2.3e-17 Pa-3 a-1) 
      v2 = new "main" model version (A = 3.0e-17 Pa-3 a-1)
      v3 = new model version, "single normal" grounding-line modif. A in App. A
      v4 = new model version, "ice-flow" grounding-line modif. B in App.A
      v5 = new model version, "trajectory" grounding-line modif. C in App. A
      v6 = new model version, "shear" grounding-line modif. D in App. A
      v7 = new model version, "strong buttressing" modif. in App. B
      v8 = new model version, "strain softening" modif. in App. B
      v9 = new model version, "0.6 Ug" modif. in App. B


RunMISMIP3d
-----------

Contains subdirectories with files fort.92.nc, fort.22 and fort.885
for idealized fjord-like MISMIP3d experiments, with names:

Run_mis3_1_v[1-6]

where 1 = model resolution (all are 1 km).

      v1 = old model version
      v2 = new "main" model version
      v3 = new model version, "single normal" grounding-line modif. A in App. A
      v4 = new model version, "ice-flow" grounding-line modif. B in App.A
      v5 = new model version, "trajectory" grounding-line modif. C in App. A
      v6 = new model version, "shear" grounding-line modif. D in App. A

RunWAIS
-------

Contains subdirectories with files fort.92.nc and fort.22 
for West Antarctic simulations, with names:

Run_[ctl,fua,fub]_[v1-10]

where ctl = control, 

      fua = RCP8.5-like future climate, no hydrofracturing or cliff failure.
      fub = RCP8.5-like future climate, with hydrofracturing and cliff failure.
      v1 = old model version
      v2 = new "main" model version 
      v3 = new model version, "single normal" grounding-line modif. A in App. A
      v4 = new model version, "ice-flow" grounding-line modif. B in App.A
      v5 = new model version, "trajectory" grounding-line modif. C in App. A
      v6 = new model version, "shear" grounding-line modif. D in App. A
      v7 = new model version, "strong buttressing" modif. in App. B
      v8 = new model version, "strain softening" modif. in App. B
      v9 = new model version, "0.6 Ug" modif. in App. B
      v10 = new "main" mode version without crevasse-depth modif. in App. C  

Code_080820
-----------

Fortran code source (*.F) and include (*.h) files for the ice-sheet model 
version used in the current paper: PSUICE3D v2.1

Make
----

make files to compile and link the model. They can use either Intel Fortran 
(ifort) or gfortran compiler. 

  makemismip+        typical MISMIP+ idealized channel experiment (1rr, v2)
  makemismip3d       typical MISMIP3d idealized channel experiment (v2)
  makewais           typical West Antarctic simulation (fua, v2)

To compile and link on different machines, edits in the make file are needed 
to set pathnames to the model code and Netcdf files. For Antarctic runs, 
observational datasets and climate forcing files are needed as inputs, 
and edits to pathnames in comicepath.h are needed for their locations.

Netcdf_ifort
------------

  Netcdf library files (libnetcdf.a and netcdf.inc) used in compiling and 
  linking, with Intel Fortran (ifort) selected in the make file.

Netcdf_gfortran
---------------

  Netcdf library files (libnetcdf.a and netcdf.inc) used in compiling and 
  linking, with gfortran selected in the make file.