[CIG-ALL] CIG News - November 2007
Sue Kientz
sue at geodynamics.org
Tue Nov 27 10:43:12 PST 2007
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CIG News
November 2007
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Also available at
http://www.geodynamics.org/cig/proposalsndocs/newsdocs/newsletter-nov07
CIG Software Release
CitcomS 3.0.1 - CitcomS is a finite element code designed to solve
thermal convection problems relevant to Earth's mantle. This release
features two implementations of compressible convection; the ability
to resume computation from previous checkpoints; multi-component
chemical convection; a fixed non-Newtonian solver; a rheology option
for pseudo-plasiticity; composition dependent viscosity and heat
generation; compressed ASCII output; an easier way for mesh
refinement for the radial coordinate; an exchanger package for solver
coupling; an option to disable monitoring of maximum temperature, and
other new features. See http://www.geodynamics.org/cig/software/
packages/mc/citcoms/ for source code and manual. You can also run
this latest version of CitcomS on the TeraGrid, see http://
www.geodynamics.org/cig/software/csa/ for instructions.
CIG Science Gateway Available
The SPECFEM3D GLOBE Web Portal provides automated and on-demand
simulations, e.g., seismic wave propagation and synthetic
seismograms. This web site launches a simulation on remote
supercomputers (mostly TeraGrid machines) using data gathered from
various web sites and databases, and returns the results to the user.
Create an account and login at https://crust.geodynamics.org/
specfem3dglobe/ to run default and customized seismology simulations
(click "Accept this certificate..." when prompted). Use the
invitation code cig-seismo-2007 when registering to start running
simulations immediately.
CIG Awarded Petascale Code Development Grant
NSF Approves Proposal for High-Resolution Mantle Convection
Simulation on Petascale Computers: Although mantle convection is key
to our understanding of the dynamics of the solid Earth, simulation
of global mantle convection at realistic Rayleigh numbers down to the
scale of faulted plate boundaries is currently intractable, due to
the wide range of time and length scales involved. The new project,
funded by NSF's Office of Cyberstructure (OCI) through the Peta-Apps
competition, is led by PI Omar Ghattas (U. Texas at Austin), and co-
PIs George Biros (Penn), Michael Gurnis (Caltech), and Shijie Zhong
(Colorado U., Boulder), and will capitalize on upcoming petascale
computing systems to carry out the first high resolution mantle
convection simulations that can resolve thermal boundary layers and
faulted plate boundaries, leading to breakthroughs in the
understanding of the dynamics of the solid Earth. To accomplish this,
CitcomS will be improved and scaled up to the petascale. Then parts
of CitcomS will be incorporated with new parallel algorithms for
adaptive mesh refinement (AMR) and inverse solution that can scale to
hundreds of thousands of processors. CIG will freely distribute the
resulting software.
Magma Code Alpha Release
The Magma Development team has finished the alpha release of the
Magma Dynamics Demonstration Suite (MADDs). The initial code
implements the zero porosity/no melting magma benchmark for mid-ocean
ridge solid flows in 2D and 3D built on the Underworld framework. The
purpose of this code is principally to validate accurate pressure
solvers for Stokes flow in current CIG supported software. Alpha code
and initial instructions are available at http://www.geodynamics.org/
cig/workinggroups/magma/workarea/benchmark/stgmadds/ .
TeraGrid Time Available
Try out CIG's community allocations on TeraGrid - On July 1, CIG's
Medium Resource Allocation award went into effect, enabling CIG to
offer the geodynamics community blocks of time on TeraGrid machines.
Sign up for an allocation to benchmark codes or to try out CIG codes
to see if the TeraGrid can work for your research. To apply for some
of CIG's TeraGrid time, send in the application at http://
www.geodynamics.org/cig/software/csa/ .
Meeting Announcements and Reports
* CIG Business Meeting, December 11 (during AGU), 6-8:30 p.m., Parc
55 Hotel, Da Vinci Room (4th Floor), San Francisco. You are invited
to this public forum for members of the Geosciences community to
discuss the future development of CIG over the next few years. Expect
a major change in format this year, with presentations by chairs of
CIG working groups and members of the Science Steering Committee.
* AMR 2007 Workshop Summary. Held October 24 to 27 in Boulder,
Colorado, the workshop was attended by 25 participants. The invited
talks and tutorials allowed participants to see the potential
benefits of AMR and the feasibility of building the software.
Discussion centered on how to implement AMR in codes that are not
easily extended to incorporate AMR capabilities. Read the full report
at http://www.geodynamics.org/cig/workinggroups/cs/workshops/amr07/
report ; workshop participants are invited to login and comment.
EC and SSC Committee Updates
New EC and SSC Members - We are pleased to announce that the
following people will be CIG's new officers filling 3-year terms:
* EC: Peter Olson (Johns Hopkins), Carolina Lithgow-Bertelloni
(University College, London), Alan Levander (Rice)
* SSC: Bruce Buffett (U Chicago), Jeroen Tromp (reelected), Omar
Ghattas (reelected)
In addition, EC members elected a new chairman, Mark Spiegelman
(Columbia), and new vice chair, Brad Hager (MIT), and SSC members
elected Brad Aagaard (USGS) as their new chairman.
Thanks to all who agreed to stand for election, and thanks also to
the outgoing members of the EC and SSC for their service to CIG: Bill
Appelbe for his hard work on the EC, especially for his invaluable
advice in computational science and software engineering; Mark
Richards for chairing the EC since October 2004 with his unique
ability to both foster discussion and bring everyone to a final
consensus; and Peter Olson for leading the SSC as chairman this past
year. We also appreciate the efforts of the Nominating Committee,
Brad Hager, Laurent Montesi, and Magali Billen, for their fine work
putting together the slate of candidates.
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Who to contact
CIG Administration, contracts, travel, etc.:
Ariel Shoresh, (626) 395-1699
ariel at geodynamics.org
Equation solvers (PETSc) and PyLith development:
Matt Knepley, knepley at mcs.anl.gov
Gale and Magma development:
Walter Landry, (626) 395-4621
walter at geodynamics.org
Benchmarking, Cigma, and visualization:
Luis Armendariz, (626) 395-1695
luis at geodynamics.org
Build procedure and computational seismology:
Leif Strand, (626) 395-1697
leif at geodynamics.org
Citcom and Mantle convection benchmarks:
Eh Tan, (626) 395-1693,
tan2 at geodynamics.org
Website and user manuals:
Sue Kientz, (626) 395-1694
sue at geodynamics.org
Geodynamo, SVN software repository, and systems administration:
Wei Mi, (626) 395-1692
wei at geodynamics.org
Software architecture and Pyre framework:
Michael Aivazis, (626) 395-1696
aivazis at caltech.edu
Administration:
Mike Gurnis, (626) 395-1698
gurnis at caltech.edu
Science Steering Committee: contact Chairman
Brad Aagaard (USGS),
baagaard at usgs.gov
Executive Committee: contact Chairman
Marc Spiegelman (Columbia),
mspieg at lamont.ldeo.columbia.edu
--
Sue Kientz
Technical Writer/Web Manager
Computational Infrastructure of Geodynamics (CIG)
http://www.geodynamics.org/
sue at geodynamics.org
ofc: (626) 395-1694
~Metaphors Be With You~
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