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Running MM5 with Overlapping Nests

  • Nests MAY NOT overlap in TERRAIN
  • Nest MAY overlap in an MM5 run - this DOES NOT involve running TERRAIN with overlapping nests.
  • To run MM5 with nests as in the figure below
    • Run TERRAIN creating DOMAIN1 ONLY
    • Set up configure.user and mm5.deck as below


configure.user

MAXNES = 4

MIX = 88
MJX = 97

make clean
make


mm5.deck

LEVIDN =  0,   1,   1,  2,  1,  1,  1,  1,  1,  1,  ; level of nest for each domain
NUMNC =   1,   1,   1,  3,  1,  1,  1,  1,  1,  1,  ; ID of mother domain for each nest
NESTIX = 35,  49,  43, 88, 46, 46, 46, 46, 46, 46,  ; domain size i
NESTJX = 41,  46,  76, 97, 61, 61, 61, 61, 61, 61,  ; domain size j
NESTI  =  1,  12,   6,  6,  1,  1,  1,  1,  1,  1,  ; start location i
NESTJ  =  1,  
6,  10, 38,  1,  1,  1,  1,  1,  1,  ; start location i
IOVERW =  1,   0,   0,  0,  0,  0,  0,  0,  0,  0,  ; overwrite nest input

IOVERW is set to 0 for domains 2,3,4

Thus TERRAIN_DOMAIN2/3/4 is not needed as model input.

As all information for domains 2-4 will be interpolated from MMINPUT_DOMAIN1, overlapping nests are allowed.

 

There is very little advantage in running the model with this configuration.

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