Update glc coupler budgets for active Greenland ice sheet [DRAFT] #6634
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Update various bits of code needed for completing and testing of glc coupler budgets. Still very much in the testing and debugging phase.
Code additions and debugging for addition of Greenland surface mass balance terms to glc budget code, including temporary lines for debugging and validation.
… component Given known number of time steps smb flux is accumulated over, x2g_ smb flux term in budget table now agrees with value calculated from mali and cpl hist files (still need to add support for automatically determining number of averaging steps). Similar support on l2x_ side is close (summing product of accumulation fluxes in different MECs w/ area fractions and cell areas) but off in budget tables from cpl calculated values by ~5%.
Checkpointing changes to coupler budget code that accounts for l2x_ and g2x_ Greenland surface mass balance fluxes, with various lines supporting debugging outputs included. Cleaned up code without debug lines to follow.
Clean up commenting and debugging lines, leaving bare minimum needed to make draft PR understandable.
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Status summary and instructions for testing: Screen grab of budget table for net water budget with Greenland SMB-related fluxes in the "wgsmb" row: The values in the table can be compared with values collated from the mali and coupler history files. The grab below shows output when applying an NCO script to do that (see below) to the cpl hist files from this 1 day BG case. This script pulls out the relevant coupler hist. vector, multiplies it by the relevant areas, sums the product, and then normalizes by earth surface area (approximately) to provide a value that can be compared to budget table values. Output from NCO script to sum relevant fields from coupler history files: The first three values are on the x2g_ side and represent (in order) 1) the summed flux from mali history files, 2) the summed flux from cpl hist files for The last two values are on the l2x_ side and represent (in order) 1) the summed flux from Note that the latter two, when multiplied by the SMB renomalization factor listed in the coupler budget table (here, 0.8823), give a value (0.0125e-6) very close to the value provided in the wgsmb row and lnd column of the coupler budget table (0.0129e-6). Remaining issues
Scripts to recreate run and cpl hist file analysis It requires updating of a few shell / path variables at the top. A copy of the script to sum and normalize fluxes from mali and cpl history files can be found here: If placed in the relevant "run" directory, it requires only that the name of the relevant 1 day mali and cpl hist files be updated at the top of the script. |
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Notes: Jon has been meeting with Steve about this. Will test more for impact when no glc. |
This DRAFT PR adds functionality to coupler budget code so that x2g_ and l2x_ fields associated with Greenland ice sheet surface mass balance are accounted for in the coupler budget tables. Also added, but currently passing fields of zeroes, is support for g2x_ fields associated with iceberg fluxes when running with a dynamic Greenland ice sheet. Additional information for testing this PR is included in the notes below.