Staff Notes Daily Announcements

There were 14 articles by NCAR/UCAR staff recently added to OpenSky and published between April 1 and April 15, 2015:

Alessandrini, S., L. Delle Monache, S. Sperati, and J.N. Nissen, 2015: A novel application of an analog ensemble for short-term wind power forecasting. Renewable Energy, 76, 768-781, DOI: 10.1016/j.renene.2014.11.061 | OpenSky

Caron, L.-P., M. Boudreault, and C.L. Bruyere, 2015: Changes in large-scale controls of Atlantic tropical cyclone activity with the phases of the Atlantic multidecadal oscillation. Climate Dynamics44, 1801-1821, DOI: 10.1007/s00382-014-2186-5 | OpenSky

Ding, R., J. Li, and Y.-H. Tseng, 2015: The impact of South Pacific extratropical forcing on ENSO and comparisons with the North Pacific. Climate Dynamics, 44, 2017-2034, DOI: 10.1007/s00382-014-2303-5 | OpenSky

Fornberg, B., and N. Flyer, 2015: Fast generation of 2-D node distributions for mesh-free PDE discretizations. Computers & Mathematics With Applications69, 531-544, DOI: 10.1016/j.camwa.2015.01.009 | OpenSky

Ma, R., J. Xu, W. Wang, G. Chen, W. Yuan, J. Lei, A.G. Burns, and G. Jiang, 2015: Characteristics and mechanisms of the annual asymmetry of thermospheric mass density. Science China: Earth Sciences58, 540-550, DOI: 10.1007/s11430-014-5020-3 | OpenSky

Mahrt, L., J. Sun, and D. Stauffer, 2015: Dependence of turbulent velocities on wind speed and stratification. Boundary-Layer Meteorology, 155, 55-71, DOI: 10.1007/s10546-014-9992-5 | OpenSky

Medeiros, B., B. Stevens, and S. Bony, 2015: Using aquaplanets to understand the robust responses of comprehensive climate models to forcing. Climate Dynamics44, 1957-1977, DOI: 10.1007/s00382-014-2138-0 | OpenSky

Nair, R.D., 2015: Quadrature-free implementation of a discontinuous Galerkin global shallow-water model via flux correction procedure. Monthly Weather Review, , DOI: 10.1175/MWR-D-14-00174.1 | OpenSky

Santos-Alamillos, F.J., D. Pozo-Vázquez, J. Ruiz Arias, and J. Tovar-Pescador, 2015: Influence of land-use misrepresentation on the accuracy of WRF wind estimates: Evaluation of GLCC and CORINE land-use maps in southern Spain. Atmospheric Research157, 17-28, DOI: 10.1016/j.atmosres.2015.01.006 | OpenSky

Schuur, E.A., A.D. McGuire, C. Schädel, G. Grosse, J.W. Harden, D.J. Hayes, G. Hugelius, C.D. Koven, P. Kuhry, D.M. Lawrence, S.M. Natali, D. Olefeldt, V.E. Romanovsky, K. Schaefer, M.R. Turetsky, C.C. Treat, and E.J. Vonk, 2015: Climate change and the permafrost carbon feedback. Nature520, 171-179, DOI: 10.1038/nature14338 | OpenSky

Wan, W., K.M. Larson, E.E. Small, C.C. Chew, and J.J. Braun, 2015: Using geodetic GPS receivers to measure vegetation water content. GPS Solutions, 19, 237-248, DOI: 10.1007/s10291-014-0383-7 | OpenSky

Wang, B., K.-S. Yun, K.-J. Ha, S.-W. Yeh, and B. Xiang, 2015: Critical role of boreal summer North Pacific subtropical highs in ENSO transition. Climate Dynamics, 44, 1979-1992, DOI: 10.1007/s00382-014-2193-6 | OpenSky

Yang, J., Z.-H. Wang, F. Chen, S. Miao, M. Tewari, J.A. Voogt, and S. Myint, 2015: Enhancing hydrologic modelling in the coupled Weather Research and Forecasting -- Urban modelling system. Boundary-Layer Meteorology155, 87-109, DOI: 10.1007/s10546-014-9991-6 | OpenSky

Yucel, I., A. Onen, K.K. Yilmaz, and D.J. Gochis, 2015: Calibration and evaluation of a flood forecasting system: Utility of numerical weather prediction model, data assimilation and satellite-based rainfall. Journal of Hydrology, 523, 49-66, DOI: 10.1016/j.jhydrol.2015.01.042 | OpenSky

For more information, contact Michael Flanagan at ext. 1180,

Fri, 05/01/2015

The TIAA-CREF Individual Counseling Sessions for May 2015 have been scheduled. The TIAA-CREF representative will be at:

Foothills Anthes Building, Room 1004. Thursday, May 7, 2015, 9:00am – 3:00pm

Mesa Lab, Chapman Room 245. Tuesday, May 19, 2015, 9:00am - 3:00pm


To schedule a counseling session, please call their Scheduling and Service Group phone reservation center at 1-800-732-8353.

These sessions are in high demand, so if you have to miss your appointment, be sure to contact TIAA-CREF as soon as possible so they can fill your time slot.

For more information, contact Irena Haimsky at ext. 8706,

Fri, 05/01/2015

As the weather turns warm, more and more people are out and about, including pedestrians, bicyclists and motorcyclists. It is especially important for motorists and cyclists to obey stop signs and speed limits at all our facilities. Pedestrians do have the right of way at marked and unmarked crosswalks, but should not enter the crosswalk when traffic is approaching. Motorists must yield to bicyclists and pedestrians, bicyclists must yield to pedestrians. Cyclists, drivers, and pedestrians all play a key role in keeping our campuses safe.

For more information, contact Christy Fletcher at ext. 8557,

Thu, 04/30/2015

FA IT will perform maintenance on a server affecting the IFAS application and Web services on Sun, May 3 between 9:00am and 1:00pm.

Those applications will be intermittently unavailable during this period.


IFAS and its webapps, including:
Time Card
Connect Self-Service
Advance Notice
Signature Authority
Charitable Contributions

For more information, contact FandA Helpdesk at ext. 8888,

Thu, 04/30/2015

These new acquisitions will be displayed at each NCAR Library location for one week, first at FL Library and then at ML Library. If you have questions regarding the items or want to suggest additions to the library collection, please contact the NCAR Library at or ext. 8505.

Modeling and Control of Antennas and Telescopes
Author: Wodek Gawronski
Publisher: Springer
Call Number: TK7871.6 .G39 2008
Location: FL Library

Climate Conundrums : What the Climate Debate Reveals About Us
Author: William B. Gail
Publisher: American Meteorological Society
Call Number: QC903 .G35 2014
Location: ML Library

For more information, contact NCAR Library at ext. 8505,

Tue, 04/28/2015

Effective immediately, for payroll assistance, please contact Missy Boone-Hall at (303)497-8860.  You can also send email to  This email alias is monitored by the payroll office staff, and someone will get back to you in a timely manner.

Questions?  Please contact Melissa Miller at or (303)497-8575.

For more information, contact Melissa Miller at ext. 8575,

Mon, 04/27/2015

To all supervisors, managers, and directors:

During this period when you are completing employee performance appraisals, please also be thinking about nominations for the annual UCAR awards.  Excellent work is being done all over this organization. It is important to recognize outstanding efforts in many ways, including the annual UCAR awards.

Nominations this year will be due on Friday, October 16th.  This deadline will be here before we know it.

Although anyone can initiate a nomination, all nominations must be submitted through the director of one of the entities listed within the awards procedures.

The winners will be announced at the December 11th annual holiday party. For past years' recipients, see the Honors & Awards website.

Thank you for keeping possible nominations for these awards in mind as you complete the annual performance appraisals.

Tom Bogdan

For more information, contact Tom Bogdan at ext. 1652,

Mon, 04/27/2015

Did you know that NCAR/UCAR staff have borrowing privileges at the University of Colorado Libraries? The NCAR Library is affiliated with CU through their University Libraries Research Partners (ULRP) program. You can apply for borrowing privileges at the Main Norlin Circulation desk with your NCAR ID. More information about the program can be found on CU's ULRP program page.

Please note that these privileges DO NOT include remote access to databases. In order to access CU databases, you must be at one of their libraries or use the NCAR Library InterLibrary Loan service to acquire electronic materials not held by the NCAR Library.

For more information, contact Jennifer Phillips at ext. 1173,

Thu, 04/23/2015

Date:       May 6, 2015
Time:       2pm
Place:       FL 2, Room 1001
Speaker:   Paul Roebber, Atmospheric Science Group and School of Freshwater Sciences
                University of Wisconsin at Milwaukee, Milwaukee, WI 53211

Probabilistic and Deterministic Forecasting using Evolutionary Program Ensembles

Charles Darwin wrote: “Can it … be thought improbable … that other variations useful in some way to each being in the great and complex battle of life, should sometimes occur in the course of thousands of generations? If such do occur, can we doubt … that individuals having any advantage, however slight … would have the best chance of surviving and of procreating their kind?” This is the conceptual basis of evolutionary programming (EP), a process in which simulated evolution is used to find solutions to problems as diverse as the sorting of numbers and forecasting minimum temperature. Despite a history in computer sciences dating back to the 1960s, the application of this idea to meteorological studies is relatively new. Recently, EP has been adapted to the weather domain in order to generate large member ensemble forecasts for minimum temperature, maximum temperature, wind power, and heavy rainfall (Roebber 2013; Roebber 2015abc). These studies have shown that the method can provide greater probabilistic and deterministic skill, particularly at the extremes, than post-processed numerical weather prediction (NWP) ensembles. Further research has shown that this skill advantage persists out to longer ranges, where the forecast signal is presumably weaker.

The method can be understood as follows. Suppose that we have a well-defined problem with a clear measure of success (e.g., root-mean-square-error), and for which we can construct solutions by performing various mathematical operations on a set of inputs. In this case, it is possible to develop a single computer program that generates algorithms which solve the defined problem by applying various operators and coefficients to the inputs. The level of success or "fitness" of a particular solution can then be measured. The idea of fitness invokes evolutionary principles and suggests that if one starts from a very large set of random initial algorithms and allows fit algorithms to propagate some portion of their components to the next generation, then it may be possible to produce improved algorithms over time. This culling of the population in favor of stronger individuals through maximizing fitness and the exchange of "genetic material" between fit algorithms drives the progress towards improved solutions. Since weather forecast problems are nonlinear with non-unique solutions, evolved programs are a new means for generating a set of skillful but independent solutions. The algorithms resemble multiple linear or nonlinear regression equations, but with conditionals that allow for special circumstances to be accounted for as a routine outcome of the data search (e.g., the impact of snow cover on temperature under conditions of clear skies and light winds; Roebber 2010).

In this talk, I will discuss the EP concept and its most recent meteorological forms, including examples from various applications of the method. Roebber (2015abc) modified the technique to incorporate various forms of genetic exchange, disease, mutation, and the training of solutions within ecological niches, and to produce an adaptive form that can account for changing local conditions (such as changing flow regimes) as well as improved forecast inputs – thus, once initial training is completed, the ensemble will adapt automatically as forecasts are produced. I will outline efforts to mitigate the tendency for EP ensembles to exhibit under dispersion as with NWP ensembles and the concept of balancing the minimization of root-mean-square error with the maximization of ensemble diversity. I will then conclude with a discussion of outstanding questions regarding the method and future research directions.

This seminar will be webcasted.

 UCAR Connect Link

For more information, contact Marybeth Zarlingo at ext. 2751,

Mon, 04/20/2015

The NCAR Community Art Program proudly presents two new exhibits:


Gay E. Lasher’s work combines digital photography, printing and computers and is expressed in the medium of textiles. As an artist, she is concerned with ideas of transformation and re-creation. Lasher is fascinated by the potential that even common photographs can be reborn in a new and completely different way. Using features of Adobe Photoshop, she transforms ordinary photographs into abstract images. Small areas are then greatly enlarged to produce the final composition which is printed on cotton. She then uses black thread and stitching to sharpen the image, create depth, and give the surface a sculptural quality. In this show Lasher is presenting selected works from her Transformations and Playing in Traffic series. Lasher's work will be on exhibit in the Community Art Gallery l of the National Center for Atmospheric Research Mesa Lab March 30, 2015 through May 30, 2015.


Over the past ten years, Michael “m.g.” Davis has explored the character of distinctly Western icons such as the horse and saddle, grain elevators, and Airstream trailers, and has sought to capture common Front Range landscapes in an uncommon style—Pointillism2. The style, employing gentle abstraction, allows Davis to recreate underappreciated objects and places which he injects with new energy through unexpected contexts and the use of vibrant color. Davis will feature two works in this show never before exhibited publicly. Davis's work will be on exhibit in the Community Art Gallery ll of the National Center for Atmospheric Research Mesa Lab March 30, 2015 through May 30, 2015.

For more information, contact Audrey Lewis at ext. 2570,

Mon, 03/30/2015

January 20-23, 2015
June 9-12, 2015
Corporate Technical Training Center
Center Green campus, 3085 Center Green Drive (CG-2)

These 3.5 day workshops are geared towards new users of NCL, and will be taught by both an associate scientist and a software engineer. The workshops include a combination of introductory lectures and hands-on labs.

During the labs, the instructors work with students to help them write NCL programs for analyzing their own data.

Limited travel funds are available for eligible students or faculty members at minority serving institutions in the United States, or from universities in EPSCoR states.

Registration is free and limited to 16 students per class, so be sure to register as soon as possible.

See the link below for information on registering for the workshop and/or applying for travel funds.

For more information, contact Mary Haley at ext. 1254,

Fri, 10/10/2014