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changes.mady.by.user Mark Taylor

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changes.mady.by.user Andrew Bradley

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  1. fluxes:  
    1. if source grid resolution uniformly  >> target grid resolution:  TR aave 
    2. otherwise:    FV2+CAAS 
  2. state and vector maps:  
    1. ocn→atm: The state map's non-zero pattern must be a superset of the ocn→atm flux map.  
      1. ocn resolution uniformly >> atm resolution:  TR aave 
      2. otherwise:   FV2+CAAS   
    2. lnd↔atm and atm→ocn
      1. if source grid resolution uniformly >> target grid resolution (fine-to-coarse):  TR  ave or intbilin
      2. if source grid resolution uniformly << target grid resolution (coarse-to-fine):  TR bilin or intbilin  (bilin slightly faster )
      3. otherwise:   TR intbilin or FV2+CAAS  (intbilin slightly faster)
    3. riv → ocn
      1. continue to use custom maps generated by E3SM/cime/tools/mapping/gen_mapping_files/runoff_to_ocn

"FV2+CASSCAAS" refers to the nonlinear approach from /wiki/spaces/COM/pages/3771301899 where an aave and 2nd order FV map are used with Compute-And-Assured-Sum (CAAS) to provide a monotone conservative map that avoids the blocky artifacts of aave maps and is more accurate than aave maps.  FV2+CAAS is comparable in accuracy to intbilin, adds conservation, but could be slightly more expensive.  

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