Summary
| Also known as
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| Model type
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Modular
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| Model part of larger framework
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| Note on status model
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| Date note status model
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Technical specs
| Supported platforms
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Unix, Linux, Mac OS
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| Other platform
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| Programming language
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Fortran77, Fortran90
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| Other program language
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| Code optimized
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| Multiple processors implemented
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| Nr of distributed processors
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| Nr of shared processors
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| Start year development
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2008
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| Does model development still take place?
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Yes
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| If above answer is no, provide end year model development
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| Code development status
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| When did you indicate the 'code development status'?
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| Model availability
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As code
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Source code availability
(Or provide future intension)
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Through owner"Through owner" is not in the list (Through web repository, Through CSDMS repository) of allowed values for the "Source code availability" property.
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| Source web address
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| Source csdms web address
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| Program license type
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GPL v2
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| Program license type other
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| Memory requirements
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1GB for input data
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| Typical run time
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1.5 days per model year on 8 processor mac
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In/Output
| Describe input parameters
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GCM initial conditions files (netcdf) files describe initial state of atmosphere up ~km 140
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| Input format
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| Other input format
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NetCDF
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| Describe output parameters
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netcdf output files describing atmospheric state, chemistry, etc
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| Output format
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| Other output format
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NetCDF
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| Pre-processing software needed?
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No
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| Describe pre-processing software
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| Post-processing software needed?
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Yes
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| Describe post-processing software
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IDL igeov viewer (IDL procedure)
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| Visualization software needed?
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Yes
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| If above answer is yes
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IDL
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| Other visualization software
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Process
| Describe processes represented by the model
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General circulation model of early Earth. Particular detail is paid to chemistry, RT, and haze microphysics
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| Describe key physical parameters and equations
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Equations focused on are the radiative transfer equations, and equations governing haze microphysics
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| Describe length scale and resolution constraints
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Currently, 4x5 degree, with 66 vertical levels up to 140 km. Resolution can be increased if neccessary
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| Describe time scale and resolution constraints
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The model takes about 4-6 model years to reach equilibrium. The modeled time period is from the Archean Earth (3.8 - 2.5 Ga)
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| Describe any numerical limitations and issues
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Dynamics, chemistry, RT, microphysical, and slab ocean model are all coupled, thus the model runs slowly.
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Testing
| Describe available calibration data sets
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Haze microphysics can be checked against Bardeen 2008 for initial accuracy.
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| Upload calibration data sets if available:
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| Describe available test data sets
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I have numerous data sets produced by an 8 processor Mac and a local unix cluster to confirm the model is initialized correctly.
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| Upload test data sets if available:
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| Describe ideal data for testing
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Cassini data describing Titan photochemical haze. Laboratory work constraining haze properties.
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Other
| Do you have current or future plans for collaborating with other researchers?
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Yes, I plan on collaborating with others in particular when it comes time to rework the model chemistry modules.
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| Is there a manual available?
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Yes
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| Upload manual if available:
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| Model website if any
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CCSM
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| Model forum / discussion board
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| Comments
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The Early earth haze microphysical code is working, incorporating fractal particle structures. Development is needed on linking microphysics to RT.
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WACCM-EE
Introduction
History
Papers
WACCM-EE Questionnaire
Contact Information
| Model
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WACCM-EE
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| Contact Person
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Eric Wolf (Model developer)
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| Institution
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ATOC, Univ. of Colorado
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| City
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Boulder, Colorado
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| Country
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USA
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| Email:
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eric.wolf@colorado.edu
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| 2nd person involved:
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--
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| 3rd person involved:
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--
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Model Description
| Model type:
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Model
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| Description:
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I am developing a GCM based on NCAR's WACCM model to studied the climate of the ancient Earth. WACCM has been linked with a microphysical model (CARMA). Some important issues to be examined are the climate of the ancient Earth in light of the faint young Sun, reducing chemistry of the early atmosphere, and the production and radiative forcing of Titan-like photochemical hazes that likely enshrouded the Earth at this time.
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Technical Information
| Supported platforms:
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Unix, Linux, Mac OSX,
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| Programming language:
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Fortran77, Fortran90
|
| Model was developed started from:
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2008 and is still going on
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| To what degree will the model become available:
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As source code
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| Current license type:
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GPLv2
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| Memory requirements:
|
1GB for input data
|
| Typical run time:
|
1.5 days per model year on 8 processor mac
|
Input / Output Description
| Input parameters:
|
GCM initial conditions files (netcdf) files describe initial state of atmosphere up ~km 140
|
| Input format:
|
netcdf
|
| Output parameters:
|
netcdf output files describing atmospheric state, chemistry, etc
|
| Output format:
|
Netcdf
|
| Post-processing software (if needed):
|
IDL igeov viewer (IDL procedure)
|
| Visualization software (if needed):
|
IDL
|
Process Description
| Processes represented by model:
|
General circulation model of early Earth. Particular detail is paid to chemistry, RT, and haze microphysics
|
| Key physical parameters & equations:
|
Equations focused on are the radiative transfer equations, and equations governing haze microphysics
|
| Length scale & resolution constraints:
|
Currently, 4x5 degree, with 66 vertical levels up to 140 km. Resolution can be increased if neccessary
|
| Time scale & resolution constraints:
|
The model takes about 4-6 model years to reach equilibrium. The modeled time period is from the Archean Earth (3.8 - 2.5 Ga)
|
| Numerical limitations and issues :
|
Dynamics, chemistry, RT, microphysical, and slab ocean model are all coupled, thus the model runs slowly.
|
Testing
| Available calibration data sets:
|
Haze microphysics can be checked against Bardeen 2008 for initial accuracy.
|
| Available test data sets:
|
I have numerous data sets produced by an 8 processor Mac and a local unix cluster to confirm the model is initialized correctly.
|
| Ideal data for testing:
|
Cassini data describing Titan photochemical haze. Laboratory work constraining haze properties.
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User Groups
| Currently or plans for collaborating with:
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Yes, I plan on collaborating with others in particular when it comes time to rework the model chemistry modules.
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Documentation
| Key papers of the model:
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- Bardeen 2008
- CAM Users Guide
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| Is there a manual available:
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Yes
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| Model website if any:
|
CCSM
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| Comments:
|
The Early earth haze microphysical code is working, incorporating fractal particle structures. Development is needed on linking microphysics to RT.
|
Issues
Help
Input Files
Output Files
Download
Source |
