Staff Notes Daily Announcements

A Multi-Layer Parallelization Scheme for Pseudospectral Computations of Fluid Turbulence
Pablo Mininni
Universidad de Buenos Aires and CONICET, Argentina

GHOST (the Geophysical High-Order Suite for Turbulence) is an accurate and highly scalable pseudospectral code that solves a variety of PDEs often encountered in studies of turbulent flows. Some of the equations that can be solved with GHOST include rotating and stratified flows using the Boussinesq approximation, compressible and incompressible magnetohydrodynamic (MHD) equations for space physics, and superfluids and Bose-Einstein condensates using the Gross-Pitaevskii equation. Recently, support for the computation of trajectories of Lagrangian particles, test particles (charged particles in a conducting fluid or a plasma), and inertial particles was added. The code uses a multi-layer parallelization method combining MPI, OpenMP and CUDA, and can run efficiently in laptops and small clusters, as well as to scale up to 100,000 CPU cores (and GPUs) in production runs in supercomputers. In this talk I will present some of the parallelization schemes used in GHOST, including a hybrid MPI-OpenMP domain decomposition of the pseudospectral grids, CUDA support, I/O handling, and performance measurements to illustrate the utility of the methods.


Pablo Mininni is a professor in the Physics Department at UBA where he was also the chair of the department from 2011 to 2015. He received his diploma in 1999 and his doctoral degree in 2003, both in physics and from the University of Buenos Aires (UBA) in Argentina. He works on the numerical and theoretical study of turbulent flows, with applications in astrophysics, geophysics, and atmospheric sciences. In the field of fluid dynamics, his expertise includes parallelization methods for computational fluid dynamics, the application of statistical methods for the characterization and analysis of turbulent flows, spectral analysis of multi-scale and multi-physics phenomena, and sub-grid modeling for turbulent flows. Applications include the solar cycle and turbulent dynamos, magnetic reconnection, rotating and stratified turbulence, and superfluid turbulence.

Tuesday, March 7, 2017
2:00 pm – 3:00 pm
Mesa Lab, Main Seminar Room

Posted by Shilo Hall at ext. 2477,

Wednesday, March 1, 2017 to Tuesday, March 7, 2017


SUBJECT:  CPM Scheduled Outage including FAB User Interface and Cognos BI Reports

DATE/TIME:  Friday, March 3rd, 2017 at 3pm


SERVICES AFFECTED:  All CPM services including Cognos BI Reports and FAB User Interface

REASON:  Regular maintenance

START: Fri Mar 3 2017 3:00 PM MST
DURATION: 3 days

Cognos BI

Reta Kubler

Kelly Box

Posted by Kelly Box at ext. 8558,

Wednesday, March 1, 2017 to Friday, March 3, 2017

Around the World in 21 days: Mapping the Global Aerosol during the Atmospheric Tomography (ATom) Project
Dr. Charles Brock

Aerosol particles in the atmosphere originate from direct emissions (biomass burning, dust, sea-spray) but also from condensation from the gas phase (secondary formation from sulfur, nitrogen, and organic species). Global models estimate that about half of cloud-nucleating particles originate from these secondary formation processes in the free troposphere, yet they are poorly studied. NASA's ATom project provides a unique opportunity to increase knowledge of the sources of particles in the remote free troposphere. ATom uses the NASA DC-8 aircraft to expand on the example provided by HIPPO by repeatedly profiling from 200 m to 12 km in the center of both the Pacific and Atlantic in four seasons. Two of the four ATom missions have been completed to date.

During ATom, NOAA is operating a suite of instruments for measuring fast response aerosol size distributions from 3 to 3000 nm in diameter. These measurements show high concentrations of newly formed particles in the tropical upper troposphere. These particles grow in descending air outside of convection because of coagulation and condensation of gas-phase species, and ultimately become large enough to be effective cloud nucleating particles. This region of tropical particle production and growth is large enough to be a globally significant source of cloud-active particles. The ATom measurements provide strong constraints on global models, which must replicate the observed patterns of particle production and growth to accurately simulate cloud radiative properties in the remote troposphere.

Seminar will be webcast at:

Tuesday March 7, 2017
3:30 - 4:30 PM
3450 Mitchell Lane Boulder, CO
FL2-1022 Large Auditorium

Posted by Meghan Stell at ext. 2043,

Wednesday, March 1, 2017 to Tuesday, March 7, 2017

Thunderstorms and lightning pose a safety risk to personnel working outdoors. Airport and airline operators, therefore, employ safety procedures that include observations and warnings of the onset and duration of lightning hazards. Ramp closures (i.e., bringing people inside) are needed to ensure the safety of outdoor personnel servicing gate-side aircraft. Yet halting outdoor work delays air traffic and can cause ripple effects beyond the impacted airport.

The presentation will discuss observed impacts of lightning-induced ramp closures on departing and arriving air traffic across the United States and examine today’s ramp closure decision-making process and associated uncertainties. The results demonstrate that ramp closures can have substantial impacts on air traffic. Moreover, varied sources of lightning information, a choice of safety procedure, and limitations on implementation effectiveness yield large uncertainty that operators have to appreciate for balancing personnel safety and operational efficiency. 

The causality of traffic delays and the propagation of delays incurred from lightning-induced ramp closures through the national airspace system are investigated by means of air traffic simulations. These simulations enable exploration of opportunities to minimize operational inefficiencies while maintaining outdoor personnel safety. Monetary valuation of the safety risks and air traffic delays allows balancing personnel safety and operational efficiency from an economic perspective. Results are shown from exploring an economic balance framework and examining impact and cost tradeoffs in search of a “most effective” lightning ramp management operation that balances both efficiency and safety.

Please join us for this talk given by Dr. Matthias Steiner. Coffee and refreshments will be offered.

Wednesday March 8
3 p.m. - 4 p.m.
FL2 1022

This will be recorded and webcast at UCAR Connect 

Posted by Karen Griggs at ext. 2750,

Wednesday, March 1, 2017 to Wednesday, March 8, 2017

My father, Stanley Ruttenberg, passed on Feb 12.  He worked at NCAR/UCAR for 30 years, starting in summer of 1964.  He was assistant to Walt Roberts, John Firor, Francis Bretherton, Bob White and Cliff Murino, and was the first director of the UCAR Projects Office (from which UOP evolved to become UCP). He worked on the GARP and GATE projects, and outside of NCAR/UCAR, was Secretary General of IAMAP, Chairman of ICSU, and worked with ESSC and CSNET.  A full obituary is posted here:

I am gathering information for a Staff Notes article to cover his science career in more detail.  If you knew or worked with Stan in any capacity (or know someone who did), please get in touch with me.  I would be most appreciative!

Posted by Becky Ruttenberg at ext. 2816,

Wednesday, March 1, 2017 to Friday, March 10, 2017

The Go Live date for Concur (Travel and Expense) is set for March 28th! In preparation for the Go Live date, the Travel office wants to share some important information:

  • Any travel started in the current Travel System must be finished in that system

  • We recommend holding off on travel requests for future travel until after March 28th to take advantage of all the features and benefits of Concur

Training begins the week of March 20th and we will have the User Support Site up in early March. Watch staff notes for further information or visit the OPEX web site.

For questions regarding Concur please email

Posted by Konnie Phillips at ext. 1101,

Wednesday, March 1, 2017 to Friday, March 10, 2017

Effective March 1, 2017 modifications were made to the "procedure for requesting an exception for UCAR Management Fee" to clarify the roles and responsibilities of the budget offices, UCAR Contracts, and the Vice President for Finance and Administration.  The guideline can be found on the Finance & Administration Guidelines web page at  For any questions please contact Gina Taberski, x2132.

Posted by Gina Taberski at ext. 2132,

Wednesday, March 1, 2017 to Wednesday, March 15, 2017
Vote to Name Our New eProcurement Site!

Help us name our Jaggaer (formerly SciQuest) eProcurement application website where staff will be able to order goods and services using online catalogs and contracts from select suppliers, saving time and money (think Amazon). Vote for your favorite one of the top four finalists selected from over 50 contest entries from staff across the organization.

Cast your ballot and vote by Friday, March 10, the polls will close at 5:00 PM! One vote per person.

The winner will receive:

  • Design Credit
  • Renown in Staff Notes Daily
  • Kudos from your peers
  • Gratitude from the Project Team
  • A $35 Gift Certificate

We will announce the winner in Staff Notes the week of March 13 and have the winner design on the website ready for Go Live on June 19. In the unlikely event of a tie, our President Tony Busalacchi will cast the tie breaking vote!

Check out the OPEX Jaggaer Purchasing project site at for more information!

Posted by Helen Moshak at ext. 1112,

Wednesday, March 1, 2017 to Thursday, March 2, 2017

Please attend the upcoming free seminars presented by the Pre-Retirement Planning Institute, Inc., a non-profit organization specializing in financial planning and pre-retirement counseling services .  Employee spouses/partners are welcome and encouraged to attend.  Each module session requires a minimum of 10 participants.

To enroll, access the Connect Employee Self-Service Web site using the link below, click on the "EOD Training Catalog" link.  To see all of these sessions at once, "Select Course Type" as "Informational" and click "Display".


Medicare Basics
March 3, 2017
12:00-2:00 pm MST and Webcast
CG1 – Room 2126
Overview - Gain a better understanding of Medicare, what is and isn't covered, how to register, and review various plan options.

Estate Planning and Housing/Transitions
March 10, 2017
12:00-2:00 pm MST and Webcast
Overview - Learn key elements of Estate Planning and what to expect in the work-to-retirement transition

Posted by Laurie Carr at ext. 8702,

Tuesday, February 28, 2017 to Friday, March 10, 2017

Weather permitting, work will begin on Friday March 3 on the Mesa Lab roofs.  Several roofs on the B-Tower and portions of the lower roofs will be removed and replaced. At times staff may notice a crane, dumpsters and construction vehicles in the front drive circle and rear dock areas.

The first crane operations – required to stock the new roofing material onto the roofs – are scheduled for Friday March 3. Throughout the construction period, please obey all construction signs and barriers.

Adhesive odors may be present during some phases of the project, and all windows in the upper levels of the B tower should be kept closed during construction.

The roof replacements are expected to be complete by the end of May.

For information, please contact Brad Pattison at ext. 2403 or email

Posted by Brad Pattison at ext. 2403,

Tuesday, February 28, 2017 to Thursday, March 2, 2017