Move runoff removal from MPAS-Ocean to data runoff component #131
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This commit is an initial demonstration of modifying rofi and rofl based on lat/lon values. It is meant to be replaced by a more appropriate treatment.
This commit adds new DROF namelist options to remove either rofl or rofi from around either the Antarctic Ice Sheet or the Greenland Ice Sheet. This is to be used when those runoff fluxes are represented elsewhere - either by data icebergs or an active GLC component. Logic is added in DROF's buildnml to activate the AIS options following the same rules currently for removing runoff currently implemented in MPAS-Ocean. The Greenland options are not currently used.
Now that this functionality occurs to DROF, remove it from occurring in MPAS-Ocean. Note this does not remove the functionality from MPAS-Ocean, just disable the logic that activated the corresponding namelist options based on compset.
TestingInitial testing using first commit on this branch. As a proof of concept, DROF is hard-coded to zero out any locations not between 0-90 deg longitude. Tested with Here is where rofl>0. It matches expectation of only being nonzero between 0-90 deg longitude. 
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TestingUsing df9a991. This version has implemented the runoff removal in DROF based in case options and uses the same latitude limits around Antarctica as MPAS-Ocean had previously done. It also disables the runoff removal in MPAS-Ocean, so effects below must be coming from the changes to DROF. Test is run with
Images show this is behaving as expected: |
This avoids doublecounting the ice-shelf melt flux calculated from MALI.
If MALI is active and in prognostic mode, use calving flux from MALI and disable DROF's rofi coming. Logic is included to differentiate between ice sheets (including the possibility of a AISGIS MALI mesh).
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This draft PR moves the ability to remove solid and liquid runoff from MPAS-Ocean where it currently occurs to the data runoff component. This has two primary advantages:
This is implemented by adding namelist options to DROF for removing rofl or rofi from either surrounding Antarctica or Greenland. The activation for disabling AIS rofi/rofl follow the same logic as used previously to activate the config_remove_ais_ice_runoff and config_remove_ais_river_runoff options in MPAS-Ocean. The options for Greenland are not currently used. When these options are active, there is new code in DROF that zeros the corresponding field (rofl or rofi) in the r2x attribute vector before it is sent to the coupler. Thus, it is as if the fluxes in those regions never existed.