Model:WACCM-EE

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WACCM-EE

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Summary Contact Technical specs In/Output Process Testing Other Component info Also known as Model type Modular Model part of larger framework Note on status model Date note status model Spatial dimensions Spatial extent Model domain One-line model description GCM for deep paleoclimate studies Extended model description 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. Keywords: paleoclimate, Name Eric Wolf Type of contact Model developer Institute / Organization University of Colorado, ATOC Postal address 1 Campus Box 392 Postal address 2 Town / City Boulder Postal code 80309 State Colorado Country United States Email address eric.wolf@colorado.edu Phone 240-461-8336 Fax Supported platforms Unix, Linux, Mac OS Other platform Programming language Fortran77, Fortran90 Other program language Code optimized Multiple processors implemented Nr of distributed processors Nr of shared processors Start year development 2008 Does model development still take place? Yes If above answer is no, provide end year model development Code development status When did you indicate the 'code development status'? Model availability As code Source code availability (Or provide future intension) Through web repository Source web address http://www.cesm.ucar.edu/working_groups/WACCM/ Source csdms web address Program license type GPL v2 Program license type other Memory requirements 1GB for input data Typical run time 1.5 days per model year on 8 processor mac Describe input parameters GCM initial conditions files (netcdf) files describe initial state of atmosphere up ~km 140 Input format Other input format NetCDF Describe output parameters netcdf output files describing atmospheric state, chemistry, etc Output format Other output format NetCDF Pre-processing software needed? No Describe pre-processing software Post-processing software needed? Yes Describe post-processing software IDL igeov viewer (IDL procedure) Visualization software needed? Yes If above answer is yes IDL Other visualization software Describe processes represented by the model General circulation model of early Earth. Particular detail is paid to chemistry, RT, and haze microphysics Describe key physical parameters and equations Equations focused on are the radiative transfer equations, and equations governing haze microphysics Describe length scale and resolution constraints Currently, 4x5 degree, with 66 vertical levels up to 140 km. Resolution can be increased if neccessary Describe time scale and 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) Describe any numerical limitations and issues Dynamics, chemistry, RT, microphysical, and slab ocean model are all coupled, thus the model runs slowly. Describe available calibration data sets Haze microphysics can be checked against Bardeen 2008 for initial accuracy. Upload calibration data sets if available: Describe 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. Upload test data sets if available: Describe ideal data for testing Cassini data describing Titan photochemical haze. Laboratory work constraining haze properties. Do you have current or future plans for collaborating with other researchers? Yes, I plan on collaborating with others in particular when it comes time to rework the model chemistry modules. Is there a manual available? Yes Upload manual if available: Model website if any CCSM Model forum / discussion board Comments The Early earth haze microphysical code is working, incorporating fractal particle structures. Development is needed on linking microphysics to RT. NOTICE: REGISTRATION IS NEEDED TO RECEIVE THE SOURCE CODE. SEND THE OWNER A LETTER THAT YOU ARE INTERESTED IN THE SOURCE CODE. http://www.cesm.ucar.edu/working_groups/WACCM/ This part will be filled out by CSDMS staff OpenMI compliant No but possible BMI compliant No but possible WMT component No but possible PyMT component Is this a data component Can be coupled with:

Model info Authors Eric Wolf Source code Go to external source code site Model citations Nr. of publications: 1 Total citations: 188 h-index: 1 m-quotient: 0.06 QR-code Link to this page Other models by author WACCM-EE

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Nr. of publications:	1
Total citations:	188
h-index:	1
m-quotient:	0.06

Publication(s)	Year	Type	Cited
. . , , . [[| (View/edit entry)]]		WACCM-EE	Model overview	Template:SEM 2047181558