The Daily Bulletin

This year's conference and tutorials are being held at NCAR Foothills Laboratory April 13 - 17, 2015 in Boulder, CO and will focus on Python in Scientific Computing.
The program for the plenary talks and tutorials can be found by visiting: and registration will be handled through the conference website:

Early Bird Registration fee of $175.00 ends on March 31, 2015, so register soon!
Thereafter, the registration fee will be $200.00. Please disseminate this information to all who may be interested.

We hope to see you there!

The CISL User Services Section will hold a one-hour seminar and discussion for Yellowstone users at 10:30 a.m. Friday, March 20, at NCAR’s Foothills Lab (FL2, Room 1003) in Boulder.

The purpose of the seminar is to have supercomputer users share their tips, tools, and best practices for accomplishing computational and analysis tasks.

Scheduled presentations:

  • Mary Haley (CISL/VETS) - The NCAR Command Language (NCL) is a powerful tool that can easily ingest data in different formats (NetCDF, GRIB, HDF) and create publication quality visualizations. This talk will include tips for visualizing data on different types of lat/lon grids (rectilinear, curvilinear, unstructured).

  • Sheri Mickelson (CISL/ASAP) - Task parallelism is a simple form of parallelism where you execute independent tasks concurrently.  This is a very simple form of parallelism that can be introduced into workflows to increase performance.   In this talk, I will go over a couple of Python scripts that execute NCL scripts in parallel using a Python library we have developed.  This library wraps MPI so the user does not have to have any MPI experience to write these simple scripts.

  • Davide Del Vento (CISL/CSG) - Is that a cluster in your browser? How to control an arbitrarily large LSF job from your browser with IPython Notebook, including change on the fly what you want the job to compute.

All Yellowstone users are welcome. Please sign up here to give us an idea of how many participants to expect.

CISL has two upcoming deadlines for large-scale allocation requests. Climate Simulation Laboratory requests are due March 23, and large requests from university researchers are due March 30.

The Climate Simulation Laboratory (CSL) is CISL's premier opportunity for researchers seeking high-performance computing and data storage systems to support extremely demanding, high-profile climate simulations. These long-running simulations typically require millions of core-hours to complete and usually produce many terabytes of model output that must be stored for analysis and comparison with other simulations and with observations. See the CSL web page for details.

Large allocations on Yellowstone are those for more than 200,000 core-hours. CISL accepts requests from university researchers for these large-scale allocations every six months. For submission instructions and information regarding available resources, see the the CISL HPC Allocations Panel (CHAP) page.

Please contact if you have any questions about the two opportunities or help determining which may be a better fit for your planned computational work.

HPSS  Downtime Tuesday, March 3, 7:00am - 9:00am

No Scheduled Downtime:  Yellowstone, Geyser_Caldera, GLADE