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sensible+latent heatfluxes using linear bulk formula #633

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merged 13 commits into from
Sep 27, 2021
Merged

sensible+latent heatfluxes using linear bulk formula #633

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db07a38
'heatflux_linear' flag: sensible+latent heatfluxes using traditional …
mhrib Sep 14, 2021
ce7b41d
Add option atmbndy='mixed' boundary layer condition
mhrib Sep 15, 2021
416bd74
New options for 'atmbndy'
mhrib Sep 15, 2021
316538c
For backward compability, rename "atmbndy" = default to similarity
mhrib Sep 16, 2021
bc292e5
Change wording for text related to atmbndy
mhrib Sep 23, 2021
779509a
Change wording for text related to atmbndy
mhrib Sep 23, 2021
b759d49
Change wording for text related to atmbndy
mhrib Sep 23, 2021
d3dd99e
Spelling error etc.
mhrib Sep 23, 2021
3954d4b
Update Icepack with required atmbndy changes
mhrib Sep 24, 2021
fa92c7f
Added test for atmbndy={constant,mixed}
mhrib Sep 27, 2021
dd18f9b
Add test for atmbndy={constant,mixed}
mhrib Sep 27, 2021
9d2aacb
Test for atmbndy={constant,mixed}
mhrib Sep 27, 2021
290744b
clean up. Renamed without underscores
mhrib Sep 27, 2021
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15 changes: 10 additions & 5 deletions cicecore/cicedynB/general/ice_init.F90
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Expand Up @@ -448,7 +448,7 @@ subroutine input_data
albsnowv = 0.98_dbl_kind ! cold snow albedo, visible
albsnowi = 0.70_dbl_kind ! cold snow albedo, near IR
ahmax = 0.3_dbl_kind ! thickness above which ice albedo is constant (m)
atmbndy = 'default' ! or 'constant'
atmbndy = 'similarity' ! Atm boundary layer: 'similarity', 'constant' or 'mixed'
default_season = 'winter' ! default forcing data, if data is not read in
fyear_init = 1900 ! first year of forcing cycle
ycycle = 1 ! number of years in forcing cycle
Expand Down Expand Up @@ -1641,13 +1641,18 @@ subroutine input_data
write(nu_diag,1010) ' rotate_wind = ', rotate_wind,' : rotate wind/stress to computational grid'
write(nu_diag,1010) ' formdrag = ', formdrag,' : use form drag parameterization'
write(nu_diag,1000) ' iceruf = ', iceruf, ' : ice surface roughness at atmosphere interface (m)'
if (trim(atmbndy) == 'default') then
tmpstr2 = ' : stability-based boundary layer'
if (trim(atmbndy) == 'constant') then
tmpstr2 = ' : boundary layer uses bulk transfer coefficients'
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I would change 'bulk' to 'constant' in this line. If I remember correctly, the overall parameterization we use is considered a 'bulk' formulation, and we're just choosing whether the coefficients are constant or not. Anyone please correct me if that's wrong. (And yes I used 'bulk' in the original comment!)

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Changed / rewritten

elseif (trim(atmbndy) == 'similarity' .or. &
trim(atmbndy) == 'mixed') then
write(nu_diag,1010) ' highfreq = ', highfreq,' : high-frequency atmospheric coupling'
write(nu_diag,1020) ' natmiter = ', natmiter,' : number of atmo boundary layer iterations'
write(nu_diag,1002) ' atmiter_conv = ', atmiter_conv,' : convergence criterion for ustar'
elseif (trim(atmbndy) == 'constant') then
tmpstr2 = ' : boundary layer uses bulk transfer coefficients'
if (trim(atmbndy) == 'similarity') then
tmpstr2 = ' : stability-based boundary layer'
else
tmpstr2 = ' : stability-based boundary layer, but constant for sensible+latent heatfluxes'
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How about
' : stability-based wind stress, constant-coefficient sensible+latent heat fluxes'

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Changed / rewritten

endif
else
tmpstr2 = ' : unknown value'
endif
Expand Down
2 changes: 1 addition & 1 deletion configuration/scripts/ice_in
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Expand Up @@ -223,7 +223,7 @@

&forcing_nml
formdrag = .false.
atmbndy = 'default'
atmbndy = 'similarity'
rotate_wind = .true.
calc_strair = .true.
calc_Tsfc = .true.
Expand Down
2 changes: 1 addition & 1 deletion doc/source/cice_index.rst
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Expand Up @@ -65,7 +65,7 @@ either Celsius or Kelvin units).
"atm_data_dir", "directory for atmospheric forcing data", ""
"atm_data_format", "format of atmospheric forcing files", ""
"atm_data_type", "type of atmospheric forcing", ""
"atmbndy", "atmo boundary layer parameterization (‘default’ or ‘constant’)", ""
"atmbndy", "atmo boundary layer parameterization ('similarity', ‘constant’, or 'mixed')", ""
"avail_hist_fields", "type for history field data", ""
"awtidf", "weighting factor for near-ir, diffuse albedo", "0.36218"
"awtidr", "weighting factor for near-ir, direct albedo", "0.00182"
Expand Down
6 changes: 4 additions & 2 deletions doc/source/user_guide/ug_case_settings.rst
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Expand Up @@ -528,8 +528,10 @@ forcing_nml
:widths: 15, 15, 30, 15

"", "", "", ""
"``atmbndy``", "``constant``", "bulk transfer coefficients", "``default``"
"", "``default``", "stability-based boundary layer", ""
"``atmbndy``", "string", "bulk transfer coefficients", "``similarity``"
"", "``similarity``", "stability-based boundary layer", ""
"", "``constant``", "constant-based boundary layer", ""
"", "``mixed``", "stability-based, but constant for sensible+latent heatfluxes", ""
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Likewise,
'stability-based wind stress, constant-coefficient sensible+latent heat fluxes'

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Changed / rewritten

"``atmiter_conv``", "real", "convergence criteria for ustar", "0.0"
"``atm_data_dir``", "string", "path to atmospheric forcing data directory", ""
"``atm_data_format``", "``bin``", "read direct access binary atmo forcing file format", "``bin``"
Expand Down