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As you requested, here is the latest digest of messages posted on CGD Forums forums. Please come and join the discussion!


<<  issues linking to the MPI library, http://bb.cgd.ucar.edu//viewtopic.php?t=30 >>

Postercathryn.meyer at yale.eduPostedWed Oct 27, 2004 5:46 pm MDT, http://bb.cgd.ucar.edu//viewtopic.php?p=108#108
Message: What if I issue the command
<br />
<br />nm $LIB_MPI/libmpich.a | grep mpi_bcast_
<br />
<br />and get
<br />
<br />00000000 W mpi_bcast_ 
<br />
<br />instead of
<br />
<br />00000000 T mpi_bcast_ 
<br />
<br />?
<br />
<br />What do T and W stand for?
<br />
<br />Cathy

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<<  aerosol calculations, http://bb.cgd.ucar.edu//viewtopic.php?t=37 >>

Postercathryn.meyer at yale.eduPostedWed Oct 27, 2004 2:15 pm MDT, http://bb.cgd.ucar.edu//viewtopic.php?p=106#106
Message: I am trying to increase the amount of soot in the atmosphere to create a warming effect.  To begin to do this (and to see the effects of the aerosols before I increase them), I think I need to enable carbon aerosols, which by default seem to be disabled.  How do I do this?
<br />
<br />Are all aerosol feedbacks turned off by default?  Is this why the aerosol optical depth (TAUVIS) is constant at zero throughout model runs?
<br />
<br />Thanks,
<br />Cathy

------------------------------
PosteraconleyPostedWed Oct 27, 2004 10:11 pm MDT, http://bb.cgd.ucar.edu//viewtopic.php?p=110#110
Message: There is a namelist parameter, carscl, which allows you to
<br />scale the carbonaceous species in the climatology by a fixed
<br />amount.
<br />                                                                                
<br />Ex:
<br />carscl = .25
<br />                                                                                
<br />scales the mass of all four species of carbonaceous aerosols
<br />to be 1/4th the amount described by the climatology.
<br />                                                                                
<br />You can also set up a time-dependent series of values for
<br />carbon scales using the namelist parameter,
<br />scenario_carbon_scale = "RAMPED"
<br />and the file with the history,
<br />bndtvcarbonscale = full-path-and-file-name-of-scales
<br />                                                                                
<br />                                                                                
<!
br />Regarding TAUVIS.  I don't believe we've left any traces of
<br />TAUVIS in the calculation.  This parameter was a way of injecting
<br />a uniform optical depth of a sulfate into the lower layers of
<br />the atmosphere.
<br />                                                                                
<br />If you'd like to know the optical depths of the aerosol species
<br />you can output AEROD (for the bulk total of all species) or
<br />CAROD for the bulk total of the carbonaceous species.
<br />(DUSTOD, SULOD, SSLTOD for dust, sulfate, seasalt)
<br />                                                                                                                                                                
<br />The namelist documentation can be found at
<br />http://www.ccsm.ucar.edu/models/atm-cam/docs/usersguide/
<br />
<br />                                                                                
<br />Click on CAM Namelist Variables
<br />Then !
on Subsection B.8

------------------------------

<<  where to download CAM2 data, http://bb.cgd.ucar.edu//viewtopic.php?t=38 >>

Postertz0616PostedWed Oct 27, 2004 2:55 pm MDT, http://bb.cgd.ucar.edu//viewtopic.php?p=107#107
Message: Dear sir/madam,
<br />
<br />       I want to download some data from CAM2 and I find the link
<br />     http://www.ccsm.ucar.edu/models/atm-cam/sims/cam2.0/
<br />     It is said that the data is only available from within UCAR in the 
<br /> MSS directory /ROSINSKI/csm/newsstamip06
<br /> Then I go to the "tempest" and find out that there is only 2 files 
<br />available, please see below
<br /> 
<br />     /home/tempest/taozmsls /ROSINSKI/csm/newsstamip06/atm/hist
<br /> newsstamip06.cam2.h0.1997-06.nc newsstamip06.cam2.h0.2000-12.nc
<br /> 
<br />   I am asking why there is only two files existing in that directory and 
<br /> where is the data archived.
<br />   I am looking forward to hearing from you,
<br />   Thanks,

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