Icepack Input Data

Forcing Data

The near surface data required for testing Icepack at a single point have been published on Zenodo and can be found at the path listed for each dataset. Details about each dataset can be found at the link following the Zenodo DOI.

The ASCII files provided contain various atmospheric and/or oceanic forcing fields. Some netCDF files (with metadata) are also available but netCDF is not yet implemented in the Icepack driver. The data files available below are designed only for testing the code, not for use in production runs or as observational data. Please do not publish results based on these data sets. Specific instructions for setting up standard tests (e.g. regression, restart) are in the User's Guide section of the documentation.

A guide to the directory structure of the Icepack input data is also available. Tar files provided below will automatically unpack with this structure.

File Availability:

File name	size	DOI and download link	compatible code versions	date added(+)/ deprecated(-)	file description
All Icepack Forcing Data	0.45 Mb		All		link

Naming standards

For any new files that will be added to the Icepack Input Data files, please note the following:

• File names must be unique from any other files in the archive.
• Existing forcing datasets will be updated only if there are errors found in the existing data.
• New forcing datasets will be added under Icepack_data/forcing/ in a new directory.

Directory structure

An example of how testing data is organized follows. We recommend setting up a similar path structure. You will need to set up your own 'inputdata' path, but the organization of the Icepack_data top level directory should follow the structure below and should automatically unpack as so from the ftp's *.tar.gz files. You will need to extract the data from the downloaded *tar.gz files.

inputdata = '/glade/p/cesm/pcwg_dev/'  
   Icepack_data/
       forcing/
         CFS/
           cfsv2_2015_220_70_01hr.nc
           cfsv2_2015_220_70_01hr.txt
         ISPOL_2004/            
           ISPOL_atm_forcing_05092018.txt
           ISPOL_atm_forcing.txt
           nutrients_daily_ISPOL_WOA_field3.txt
           pop_frc.gx1v3.051202_but_hblt_from_010815_ispol.txt
         NICE_2015/            
           NICE_atm_forcing_05092018.txt
           NICE_atm_forcing.txt
           nutrients_daily_ISPOL_WOA_field3.txt
           oceanmixed_daily_3.txt
        SHEBA
           open_clos_lindsay.dat

Description of Tar file

There are currently five types of data, described below. Forcing fields that are unavailable in a chosen data file take default values for the season set in namelist.

CFS:

Output from the CFSRv2 dataset for 2015.

ISPOL 2004:

Measurements from the Ice Station Polarstern (2004) field experiment.

NICE 2015:

Measurements from the N-ICE (2015 field experiment.

SHEBA:

A monthly climatology based on [Lindsay 1998], and default values representative of winter, spring and summer.

Lindsay, R.W. (1998). Temporal Variability of the Energy Balance of Thick Arctic Pack Ice. Journal of Climate. https://doi.org/10.1175/1520-0442(1998)011<0313:TVOTEB>2.0.CO;2