Module 6 MM5: Overview William J. Gutowski, Jr. Iowa State University.
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Transcript of Module 6 MM5: Overview William J. Gutowski, Jr. Iowa State University.
![Page 1: Module 6 MM5: Overview William J. Gutowski, Jr. Iowa State University.](https://reader035.fdocuments.in/reader035/viewer/2022070411/56649f455503460f94c668a2/html5/thumbnails/1.jpg)
Module 6 Module 6 MM5: OverviewMM5: Overview
William J. Gutowski, Jr.William J. Gutowski, Jr.Iowa State UniversityIowa State University
![Page 2: Module 6 MM5: Overview William J. Gutowski, Jr. Iowa State University.](https://reader035.fdocuments.in/reader035/viewer/2022070411/56649f455503460f94c668a2/html5/thumbnails/2.jpg)
GOALS:GOALS:Flow of information in MM5 systemFlow of information in MM5 systemTasks of individual codesTasks of individual codesEmphasis on climate simulation Emphasis on climate simulation
Module 6 Module 6 MM5: OverviewMM5: Overview
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OUTLINE:OUTLINE:
Overall SystemOverall System
PreprocessingPreprocessing
MM5 detailsMM5 details
Module 6 Module 6 MM5: OverviewMM5: Overview
![Page 4: Module 6 MM5: Overview William J. Gutowski, Jr. Iowa State University.](https://reader035.fdocuments.in/reader035/viewer/2022070411/56649f455503460f94c668a2/html5/thumbnails/4.jpg)
OUTLINE:OUTLINE:
Overall SystemOverall System
Module 6 Module 6 MM5: OverviewMM5: Overview
![Page 5: Module 6 MM5: Overview William J. Gutowski, Jr. Iowa State University.](https://reader035.fdocuments.in/reader035/viewer/2022070411/56649f455503460f94c668a2/html5/thumbnails/5.jpg)
REGRID
INTERPF
MM5 Modeling System
Preprocessing
TERRAIN
![Page 6: Module 6 MM5: Overview William J. Gutowski, Jr. Iowa State University.](https://reader035.fdocuments.in/reader035/viewer/2022070411/56649f455503460f94c668a2/html5/thumbnails/6.jpg)
REGRID
INTERPF
MM5
MM5 Modeling System
Preprocessing
Simulation
TERRAIN
![Page 7: Module 6 MM5: Overview William J. Gutowski, Jr. Iowa State University.](https://reader035.fdocuments.in/reader035/viewer/2022070411/56649f455503460f94c668a2/html5/thumbnails/7.jpg)
REGRID
INTERPF
MM5
Output Analysis
MM5 Modeling System
Preprocessing
Simulation
Postprocessing
TERRAIN
GRAPH/RIP
![Page 8: Module 6 MM5: Overview William J. Gutowski, Jr. Iowa State University.](https://reader035.fdocuments.in/reader035/viewer/2022070411/56649f455503460f94c668a2/html5/thumbnails/8.jpg)
TERRAIN
REGRID
MM5
Output Analysis
MM5 Modeling System
RAWINS/little_r
INTERPB
NESTDOWN
INTERPF
GRAPH/RIP
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MM5 Coordinates: Vertical
σ = p- ptop( ) psurf -ptop( )
σ =1
σ =0ptop
psurf
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MM5 Coordinates: Vertical
σ = p- ptop( ) psurf -ptop( )
σ =1
σ =0ptop
psurf
˙ σ ,w
u,v,T,q,p'
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MM5 Coordinates: Horizontal
I
J(1,1)
(IMAX,JMAX)
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MM5 Coordinates: Horizontal
X X X
X X X
X X X
I
J(1,1)
(IMAX,JMAX)
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MM5 Coordinates: Horizontal
X X X
X X X
X X X
I
J(1,1)
(IMAX,JMAX)
u,v
T,q,p’,wArakawa
B-grid
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MM5 Modeling System
How does a “flat” grid ...
X X
X X
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MM5 Modeling System
How does a “flat” grid ...
...represent part of the spherical earth?
X X
X X ?
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MM5 Modeling System
By projection to a flat plane
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MM5 Modeling System
PolarStereographic
True at 90o
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MM5 Modeling System
Lambert Conformal
True at, e.g.,30o and 60o
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MM5 Modeling System
Mercator
True at 0o
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MM5 Modeling System
Map Factor:m = (distance on grid)/(distance on earth)
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MM5 Modeling System
Forcing Frame:for lateral
boundary conditions“free” interior
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MM5 Modeling System
Other Features: • Nonhydrostatic
• Grid nesting
dwdt
−u2 +v2
a=−
1ρ
∂p∂z
+2Ωucosφ −g+Frz
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OUTLINE:OUTLINE:
Overall SystemOverall System
PreprocessingPreprocessing
Module 6 Module 6 MM5: OverviewMM5: Overview
![Page 24: Module 6 MM5: Overview William J. Gutowski, Jr. Iowa State University.](https://reader035.fdocuments.in/reader035/viewer/2022070411/56649f455503460f94c668a2/html5/thumbnails/24.jpg)
REGRID
INTERPF
Preprocessing
Preprocessing
TERRAIN
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Preprocessing
Data preparation: topography land use gridded, 3-D atmospheric fields
wind temperature humidity geopotential height
initial surface conditions soil moisture soil temperature
(direct observations)
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Preprocessing
TERRAIN(1) establishes model domain and grid(2) interpolates topographic and land use data to model grid
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Preprocessing
TERRAIN domain specifications:• projection
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Preprocessing
TERRAIN domain specifications:• projection• central latitude/longitude
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Preprocessing
TERRAIN domain specifications:• projection• central latitude/longitude• # of grid points
(IMAX,JMAX)
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Preprocessing
TERRAIN domain specifications:• projection• central latitude/longitude• # of grid points• grid spacing
(IMAX,JMAX)
X, Y
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Preprocessing
TERRAIN input:1. Topographic data
• 1o
• 30 min.• 10 min.• 5 min.• 30 sec.
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Preprocessing
TERRAIN input:
2. Land use/vegetation data
• PSU/NCAR (13 categories,
global)
• SiB (17 categories, North
America)
• USGS (25 categories, global)
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Preprocessing
TERRAIN input:
3. Land/water mask
• SiB (North America)
• USGS (global)
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Preprocessing
TERRAIN input:
4. Soil texture
5. Monthly vegetation fraction
6. Deep soil temperature
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Preprocessing
TERRAIN interpolation options:
• 16-point, 2-D overlapping parabolic fit
(all TERRAIN fields)
• Cressman-type objective analysis
(topography only)
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Preprocessing
TERRAIN output files:
terrestrial data files
printout (run information) file
plot file in NCAR Graphics format
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REGRID
INTERPF
Preprocessing
Preprocessing
TERRAIN
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Preprocessing
REGRIDInterpolates gridded atmospheric data horizontally to model grid
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Preprocessing
REGRID input:• TERRAIN output• Atmospheric analysis on pressure levels
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Preprocessing
REGRID output:• Atmospheric data on model’s horizontal grid (on pressure levels)
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REGRID
INTERPF
Preprocessing
Preprocessing
TERRAIN
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Preprocessing
INTERPF•Interpolates atmospheric data vertically to
model grid•Generates surface fields: pressure, air
temperature•Initializes nonhydrostatic model
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Preprocessing
INTERPF1. Ingest REGRID output2. Interpolate vertically to coordinate3. Output initial conditions & lateral
boundary conditions
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OUTLINE:OUTLINE:
Overall SystemOverall System
PreprocessingPreprocessing
MM5 detailsMM5 details
Module 6 Module 6 MM5: OverviewMM5: Overview
![Page 45: Module 6 MM5: Overview William J. Gutowski, Jr. Iowa State University.](https://reader035.fdocuments.in/reader035/viewer/2022070411/56649f455503460f94c668a2/html5/thumbnails/45.jpg)
REGRID
INTERPF
MM5
MM5 details
Preprocessing
Simulation
TERRAIN
![Page 46: Module 6 MM5: Overview William J. Gutowski, Jr. Iowa State University.](https://reader035.fdocuments.in/reader035/viewer/2022070411/56649f455503460f94c668a2/html5/thumbnails/46.jpg)
Conservation laws:(1) Projected to model grid(2) Transformed to sigma coordinates
MM5 details
dudt
−uvtanφ
a+
uwa
=−1ρ
∂p∂x
+2Ωvsinφ−2Ωwcosφ+Frx
∂u∂t
+mρ
(∂ ′ p ∂x
−σp*
∂p*∂x
∂ ′ p ∂σ
) =
−V ⋅∇u+v( f +u∂m∂y
−v∂m∂x
)−ewcosα −uwrearth
+Du
Earlier:
Tutorial, p.8-4:
![Page 47: Module 6 MM5: Overview William J. Gutowski, Jr. Iowa State University.](https://reader035.fdocuments.in/reader035/viewer/2022070411/56649f455503460f94c668a2/html5/thumbnails/47.jpg)
Conservation laws:(1) Projected to model grid(2) Transformed to sigma coordinates
MM5 details
dudt
−uvtanφ
a+
uwa
=−1ρ
∂p∂x
+2Ωvsinφ−2Ωwcosφ+Frx
∂u∂t
+mρ
(∂ ′ p ∂x
−σp*
∂p*∂x
∂ ′ p ∂σ
) =
−V ⋅∇u+v( f +u∂m∂y
−v∂m∂x
)−ewcosα −uwrearth
+Du
Earlier:
Tutorial, p.8-4:
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Time Stepping:
MM5 details
t t
n-1 n n+1
T, q, advection, physics, boundary, coriolis, diffusion terms
Long (leapfrog) step
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Split-explicit Time Stepping:
MM5 details
t t
n-1 n n+1
T, q, advection, physics, boundary, coriolis, diffusion terms
pressure gradients, divergence terms
Short (forward) step
Long (leapfrog) step
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MM5 details
Convection parameterization
Options -• None• Anthes-Kuo• Grell• Arakawa-Schubert• Fritsch-Chappell• Kain-Fritsch• Betts-Miller• Shallow Cumulus
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MM5 details
Explicit Moisture Schemes
Options -• Dry• Stable• Warm microphysics• Simple ice• Mixed phase• Goddard• Reisner graupel• Schultz microphysics
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Planetary Boundary Layer Schemes
MM5 details
Options -• None• Bulk• High-Res. Blackadar• Burk-Thompson• Eta • MRF• Gayno-Seaman
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MM5 details
Radiation Schemes
Options -• None• Simple cooling• Cloud-radiation• CCM2• RRTM longwave
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MM5 details
Land Surface Schemes
Options -• None•Force-Restore• Five-Layer Soil• OSU/Eta Land-Surface Model
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MM5 details
Scheme Couplings
RadiationRadiation
SurfaceSurface
Explicit MoistureExplicit Moisture ConvectionConvection
PBLPBL
cloud
moistening
downward SW & LW
upward LW& albedo
sfc. fluxes
sfc. T,q,wind
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REGRID
INTERPF
MM5
Output Analysis
MM5 Modeling System
Preprocessing
Simulation
Postprocessing
TERRAIN
GRAPH/RIP