Added capability to track melt-by-ice-sheet-basin. Fixed consistency under different PE layouts for positioning of new footloose bergs. #70
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…oose bergs from parent berg so that it will be consistent under different PE layouts
….g. IMBIE basins), which are then associated with bergs as they calve from the basins. Note each basin must extend at least one ocean cell past the ice front. Then, the iceberg melt associated with each basin can also be saved
…y having it as a dynamic field
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Added capability to read in a gridded field of ice-sheet basin IDs (e.g. IMBIE-3 basins), which are then associated with bergs as they calve from the basins. The iceberg melt fields associated with each basin can be saved and outputted.
Must provide a file "./INPUT/ice_sheet_basins.nc" (which resembles "./INPUT/ocean_topog.nc" in structure), with the field "sub_basin" that labels ice-sheet cells with their basin ID (which span 1 through n for the n basins). Non-ice-sheet cells are labeled as 0. Each basin in the file must extend at least one ocean cell past the ice front.
Must add to icebergs_nml:
nbasins = 18 !number of basins (18 for Antarctica for IMBIE-3)
use_berg_origin_basins = .true.
The diag_table field names for the basin-ID field and the melt-rate field associated with each basin are, respectively:
"ice_sheet_basins"
"melt_by_ice_sheet_basin"
The basin ID field should also output as "ice_sheet_basins_static"
Also changed the random positioning of new footloose child bergs around their parents so that it is consistent under different PE layouts.