Available configurations for the replay

Available Compsets

The replay requires resetting buffer variables to their previous values every time the model backs up. The current setup only resets buffer variables in the FHIST_DARTC6 compset, which is similar to the normal AMIP compsets but with a stub river component and has been used for other data assimilation purposes. A description of the compset is in components/cam/cime_config/confic_compsets.xml.

Additional compsets could be added by making similar changes to the ocean or river buffer variables (any variables that show up in the component.r. restart file) as for the CICE and CLM components (see API for descriptions of what files need to be changed).

Available Resolutions

Replay should be able to use any fv resolution that matches your reanalysis dataset.

Namelist parameters

Various additional Namlist parameters are available for configuring the replay, defined in components/cam/bld/namelist_files/namelist_definition.xml. Specific replay parameters are defined below:

Replay_Model:
type=”logical”, category=”replay”, group=”replay_nl”

Toggle replay ON/OFF.

Default: FALSE

Replay_Path:
type=”char*256”, input_pathname=”abs”, category=”replay”, group=”replay_nl”

Full pathname of analyses data to use for replay. (e.g. ‘/$DIN_LOC_ROOT/atm/cam/replay/’)

Default: none

Replay_File_Template:
type=”char*80”, category=”replay”, group=”replay_nl”

Template for replay analyses file names. (e.g. ‘/MERRA2_%y%m%d_%h.nc’)

Default: none

Replay_Beg_Year:
type=”integer”, category=”replay”, group=”replay_nl”

Year at which replay begins.

Default: 1980

Replay_coef:
type=”real”, category=”replay”, group=”replay_nl”

Coeffcient for replay [0.,1.]. Fraction of nudging tendency applied: usually 1 (full forcing) or 0 (no forcing).

Default: 1.

Replay_coef_U
type=”real” category=”replay”, group=”replay_nl”

U Coeffcient for replay – usually 1 (full forcing) or 0 (no forcing) [0.,1.] fraction of nudging tendency applied.

Default: 1.

Replay_coef_V
type=”real” category=”replay”, group=”replay_nl”

V Coeffcient for replay – usually 1 (full forcing) or 0 (no forcing) [0.,1.] fraction of nudging tendency applied.

Default: 1.

Replay_coef_T
type=”real” category=”replay”, group=”replay_nl”

T Coeffcient for replay – usually 1 (full forcing) or 0 (no forcing) [0.,1.] fraction of nudging tendency applied.

Default: 1.

Replay_coef_Q
type=”real” category=”replay”, group=”replay_nl”

Q Coeffcient for replay – usually 1 (full forcing) or 0 (no forcing) [0.,1.] fraction of nudging tendency applied.

Default: 1.

Replay_coef_PS
type=”real” category=”replay”, group=”replay_nl”

PS Coeffcient for replay – usually 1 (full forcing) or 0 (no forcing) [0.,1.] fraction of nudging tendency applied.

Default: 1.

Replay_Hwin_lat0
type=”real” category=”replay”, group=”replay_nl”

LAT0 center of Horizontal Window in degrees [-90.,90.].

Default: 0

Replay_Hwin_latWidth
type=”real” category=”replay”, group=”replay_nl”

Width of LAT Window in degrees.

Default: 9999 (all latitudes)

Replay_Hwin_latDelta
type=”real” category=”replay”, group=”replay_nl”

Width of transition which controls the steepness of window transition in latitude. 0. –> Step function

Default: 1

Replay_Hwin_lon0
type=”real” category=”replay”, group=”replay_nl”

LON0 center of Horizontal Window in degrees [0.,360.].

Default: 180

Replay_Hwin_lonWidth
type=”real” category=”replay”, group=”replay_nl”

Width of LON Window in degrees.

Default: 9999 (all longitudes)

Replay_Hwin_lonDelta
type=”real” category=”replay”, group=”replay_nl”
Width of transition which controls the steepness of window transition in longitude.

  1. –> Step function

Default: none

Replay_Hwin_Invert
type=”real” category=”replay”, group=”replay_nl”

Invert Horizontal Window Function to its Compliment. TRUE = value=0 inside the specified window, 1 outside (unforced model within window, replay outside) FALSE = value=1 inside the specified window, 0 outside (replay within window, unforced model outside)

Default: FALSE

Replay_Vwin_Hindex
type=”real” category=”replay”, group=”replay_nl”

HIGH Level Index for Verical Window specified in terms of model level indices. (e.g. For a 30 level model, Replay_Vwin_Hindex ~ 30 ). For CAM, this is the bound closer to the surface

Default: Vertical levels + 1

Replay_Vwin_Hdelta
type=”real” category=”replay”, group=”replay_nl”

Width of transition for HIGH end of Vertical Window.

Default: 0.001

Replay_Vwin_Lindex
type=”real” category=”replay”, group=”replay_nl”

LOW Level Index for Verical Window specified in terms of model level indices. (e.g. Replay_Vwin_Lindex ~ 0 ) For CAM, this is the bound closer to the top of atmosphere.

Default: 0

Replay_Vwin_Ldelta
type=”real” category=”replay”, group=”replay_nl”

Width of transition for LOW end of Vertical Window.

Default: 0.001

Replay_Vwin_Invert
type=”real” category=”replay”, group=”replay_nl”

Invert Vertical Window Function to its Compliment. TRUE = value=0 inside the specified window, 1 outside FALSE = value=1 inside the specified window, 0 outside

Default: FALSE

Replay_Uprof
type=”real” category=”replay”, group=”replay_nl”

Profile index for U replaying. 0 == OFF (No replaying of this variable) 1 == CONSTANT (Spatially Uniform Replaying) 2 == HEAVISIDE WINDOW FUNCTION (Use windowing)

Default: 1

Replay_Vprof
type=”real” category=”replay”, group=”replay_nl”

Profile index for V replaying. 0 == OFF (No replaying of this variable) 1 == CONSTANT (Spatially Uniform Replaying) 2 == HEAVISIDE WINDOW FUNCTION (Use windowing)

Default: 1

Replay_Tprof
type=”real” category=”replay”, group=”replay_nl”

Profile index for T replaying. 0 == OFF (No replaying of this variable) 1 == CONSTANT (Spatially Uniform Replaying) 2 == HEAVISIDE WINDOW FUNCTION (Use windowing)

Default: 1

Replay_Qprof
type=”real” category=”replay”, group=”replay_nl”

Profile index for Q replaying. 0 == OFF (No replaying of this variable) 1 == CONSTANT (Spatially Uniform Replaying) 2 == HEAVISIDE WINDOW FUNCTIO (Use windowing)N

Default: 1

Replay_PSprof
type=”real” category=”replay”, group=”replay_nl”

Profile index for PS replaying. 0 == OFF (No replaying of this variable) 1 == CONSTANT (Spatially Uniform Replaying) 2 == HEAVISIDE WINDOW FUNCTIO (Use windowing)N

Default: 0