Outstanding Accomplishment Awards - 2014 nominees

Winners will be announced at holiday party

December 2, 2014 | Listed below are the UCAR 2014 Outstanding Accomplishment Award Nominations. Please note that if there was only one nomination received in a particular category, that single nomination would not be included below. Winners will be announced on December 12 at the 2014 Outstanding Accomplishment Awards and Holiday Celebration in the Center Green auditorium. To find out more, see About NCAR & UCAR Awards to Staff or check out previous winners.

Outstanding Publication Nominations

Rolando R. Garcia (NESL/ACD), Douglas E. Kinnison (NESL/ACD), and Daniel R. Marsh (NESL/ACD)

Garcia, R. R., Kinnison, D. E., & Marsh, D. R., 2012: “World avoided” simulations with the whole atmosphere community climate model. Journal of Geophysical Research: Atmospheres (1984–2012)117 (D23).
http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-011-737

William "Al" Cooper (far right) accepts Distinguished Achievement Award
William "Al" Cooper (far right) accepts the Distinguished Achievement Award during the 2013 ceremony and holiday celeration. This is the one award for which nominations are never published. With Al are presenters (left to right) Tom Bogdan (UCAR President), Katy Schmoll (UCAR Vice President for Finance and Administration), Jim Hurrell (NCAR director), and filling in for UCP director Emily CoBabe-Ammann, Karyn Sawyer (UCP/JOSS Director). (Photo courtesy Marijke Unger, CISL.)
 

This article describes a numerical modeling study of the consequences of unchecked growth in ozone-depleting substances (ODS). This is the definitive study on the topic, as it is the first to use a “whole atmosphere” climate model with fully-coupled photochemistry. This allowed evaluation of the response of atmospheric ozone, in particular, and the climate system, in general, to very large atmospheric concentrations of ODS. Climate responses follow from changes in absorption of ultraviolet radiation as ozone decreases and from the warming effect of the ODS, which act as greenhouse gases. The principal conclusions of the study are that continued growth of ODS would have led to a global collapse of the ozone layer by mid-21st century, and that the increased burden of ODS would have produced by the end of the 21st century radiative forcing comparable to that expected from increases in CO2, methane and nitrous oxide combined. The study also explored the reversibility of these effects if emissions of ODS were halted abruptly in mid-21st century. It was shown that, while tropical ozone loss would be quickly reversed, ozone depletion over the polar caps and much of the radiative effect of the increased ODS burden would disappear only over the course of a century.

Stephen Yeager (NESL/CGD), Alicia Karspeck (NESL/CGD), Gokhan Danabasoglu (NESL/CGD), Joe Tribbia (NESL/CGD), and Haiyan Teng (NESL/CGD)

Stephen Yeager, Alicia Karspeck, Gokhan Danabasoglu, Joe Tribbia, and Haiyan Teng, 2012: A decadal prediction case study: Late Twentieth-Century North Atlantic Ocean heat content. Journal of Climate, 25, 5173–5189, doi: 10.1175/JCLI-D-11-00595.1.
http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-011-048

Predicting climate change in the near-term, over time horizons of up to a few decades into the future, is a relatively new and rapidly evolving field of climate science. Such “decadal prediction” research is aimed at bridging the gap between seasonal-to-interannual forecasting carried out by many operational weather services worldwide, and the centennial timescale future climate change projections that are the mainstays of the periodic IPCC assessments. Decadal time scales and regional spatial scales are particularly relevant to policy makers and other climate stakeholders. Skillful decadal predictions have the potential to confer tremendous benefits to society by providing advance warning of climate changes such as prolonged droughts, severe heat waves, and increased hurricane activity. The nominated publication distinguishes itself as an outstanding publication on the topic of decadal prediction in several respects:

  • This study has provided impetus for continued and expanded decadal prediction efforts at NCAR, and influenced the latest Strategic Plans of NCAR, NESL and CGD that now highlight decadal climate prediction as a Grand Challenge objective (NCAR Strategic Plan: 2014-2019).
  • It demonstrates that significant decadal prediction skill is possible today using community models developed by NCAR.
  • It goes beyond simply documenting predictive skill by providing a clear explanation of the physical processes that give rise to that skill through a rigorous and innovative analysis of a relevant case study.

Its immediate and lasting impact on the international research community is evidenced by a high and accelerating citation rate.

Jielun Sun (NESL/MMM), Larry Mahrt (Oregon State University), Robert Banta (NOAA/ESRL), and Yelena Pichugina (NOAA/ESRL)

Sun, J., L. Mahrt, R. M. Banta, and Y. L. Pichugina, 2012: Turbulence regimes and turbulence intermittency in the stable boundary layer during CASES-99. J. Atmos. Sci., 69, 338-351.
http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-010-814

This paper develops an innovative approach to describe the structure of turbulence in the neutral to stably stratified atmospheric boundary layer (NSABL), which is commonplace at night over land. The NSABL is notoriously difficult for weather and climate forecasting models to handle because of the difficulty in dealing with intermittent turbulence events, which is a characteristic feature of the NSABL. Classical turbulence theory predicts that local vertical wind shear is the proper scaling variable for turbulence generation. Based on the systematic analyses of the observations collected from the CASES-99 field experiment, Sun and her coauthors carefully categorized all the turbulence events into three distinct regimes and clearly demonstrated that the bulk shear (i.e., shear between the observation level and the surface), instead of local shear, controls turbulence generation for the strong- wind regime. Switching between the weak and strong wind regimes can explain many previously puzzling intermittent turbulent-mixing events. Although similar observations have previously been made, this is the first coherent explanation of turbulence generation that incorporates all nocturnal wind conditions. The paper clearly describes and forcefully documents, aided by well-crafted figures, the shortcomings of the previous approach and how the new approach improves predictions of the NASBL structure. It is an exceptional example of using a simple idea in an ingenious way that in retrospect seems obvious, and yet had not previously been exploited. This new concept challenges traditional turbulence theory now used in almost all mesoscale and climate numerical models, and shows a new direction for improving turbulence parameterizations in those models.

Daran L. Rife (DNV-GL Energy, San Diego, CA), James O. Pinto (NCAR/RAL), Andrew J. Monaghan (NCAR/RAL), Christopher A. Davis (NCAR/Directorate – ASP), and John R. Hannan (Defense Threat Reduction Agency, Fort Belvoir, VA)

Rife, D. L., J. O. Pinto, A. J. Monaghan, C. A. Davis, and J. R. Hannan, 2010: Global distribution and characteristics of diurnally varying low-level jets. Journal of Climate, 23 (19), 5041–5064.
http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-000-630

This pioneering effort produced the first quantitative global maps of nocturnal low-level jet (LLJ) activity, which significantly enhanced the knowledge of LLJs in terms of their global distribution, seasonality, structure, and dynamics. To accomplish this feat, the authors developed a fully three-­dimensional global analysis with (then) unprecedented spatial and temporal resolution, and a novel quantitative index to identify the location and peak time of occurrence of LLJs. LLJs play a pivotal role in the global hydrologic cycle, and the authors’ analysis revealed that they are present across huge portions of the continents. The authors also established an important link between LLJs and regional climates. The primary breakthrough of this study is the identification of a number of new LLJs, including those recurring over Africa, South America, the Middle East, and China, which has blazed a path for new exploration, as evidenced by numerous referencing papers. In summary, this paper provides a landmark contribution to the understanding of LLJs around the globe by allowing LLJs to be viewed as a network of interconnected circulations, and sublimely extending “mesoscale thinking” to a global scale.

John Hubbert (EOL), Scott Ellis (EOL), Mike Dixon (EOL), and Greg Meymaris (EOL)

Hubbert, J. C., Ellis, S. M., Dixon, M., & Meymaris, G., 2010: Modeling, error analysis, and evaluation of dual-polarization variables obtained from simultaneous horizontal and vertical polarization transmit radar. Part I: Modeling and antenna errors. Journal of Atmospheric and Oceanic Technology, 27 (10), 1583-1598.
http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-001-164

This paper is an important contribution toward better scientific understanding of physical reasons for biased polarimetric radar data. The findings of this study will significantly improve the operational rain rate estimates derived from the U.S. National Weather Service (NWS) WSR-88D radar network. Hazardous weather costs this nation billions of dollars each year with increasing frequency and severity. Flooding resulting from heavy rainfall is by far the most destructive event to our society (e.g., the Boulder flood of 2013; the flood in the Northeastern U.S. after the landfall of Hurricane Sandy), leaving death and destruction of property in its wake. Because forecast models are still lacking in their ability to predict accurate rainfall amounts, weather radars with polarimetric capability have been relied upon to fill the gaps of rainfall measurements by discrete and unevenly distributed rain gauges, and are used in warning and mitigating the effects of hazardous weather on society. The U.S. NWS WSR-88D network has been recently upgraded to dual-polarization, adopting the simultaneous horizontal (H) and vertical (V) polarized transmit/receive (T/R) mode, the so-called SHV, in lieu of a traditional alternating (ALT) H and V polarized T/R mode. Studies have shown that SHV technology could lead to biased radar data. If not corrected, such biased data can lead to up to 50 percent errors in radar-derived rain rate, resulting in misinterpretation, false alarms, and missed hazard warnings; however, neither of these studies showed definitive experimental proof of these biases.

Yuhong Fan (HAO)

Fan, Y., 2010: On the eruption of coronal flux ropes. The Astrophysical Journal, 719, 728–736, August 10.
http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-000-376

Numerical simulations are powerful tools for probing the origins of space weather arising from coronal mass ejections (CMEs). This groundbreaking paper uses simulations to convincingly demonstrate how twisted magnetic fields in the Sun’s corona may transition from an initially stable state into a CME eruption. By feeding varying amounts of twisted magnetic field up into the corona from beneath the Sun’s surface, Yuhong was able to simulate an eruption and show that its trigger arose from a particular magnetic instability. This “torus instability” arises when a hoop of twisted magnetic fields, or “flux rope,” can no longer be confined by overlying magnetic loops and expands uncontrollably. Indeed, Yuhong found that dynamic eruption occurred when the simulated flux rope reached a critical height relative to surrounding coronal magnetic fields consistent with analytical predictions of where the torus instability should occur. In a nuance difficult to capture in analytical studies, her simulations indicated that magnetic reconnection beneath the flux rope played a key role in the build-up and rise of the rope to the critical height. Yuhong linked these findings to specific observational signatures that can be used to test the prevalence of the torus instability in solar eruptions, and potentially to predict the onset of CMEs and subsequent space weather activity.

Mentoring Nominations

Matthew Mayernik (UCP/IIS)

Matt is nominated for his exemplary and sustained efforts to mentor data and information science graduate students, significantly improving their preparation for careers in data curation in scientific research environments. This work has ground-breaking impact on building workforce capacity to meet needs for curating unprecedented levels of research data production as articulated by the National Research Council and the National Science Foundation. Over the last four years Matt has made outstanding contributions in both one-on-one mentoring of students and developing and refining a model for integrating hands-on research experiences in their data curation education. Advancing this mentoring model of data scientists, information scientists, and atmospheric scientists working together has significantly sped up the process of workforce development in an emerging field.

Greg Holland (NESL/MMM)

Greg has a formidable scientific and leadership reputation and is widely known for mentoring young scientists in the field of extreme weather, in particular tropical cyclones. His commitment to mentoring throughout his career not only advanced the careers of fortunate mentees but also had broader impacts across UCAR through increased diversity in the workplace, proposal success rates, innovative interdisciplinary research papers, and closer integration of UCAR science with society. Greg thrives on interaction with young scientists, and provides the nurturing environment for early career scientists to realize their full potential. Greg’s holistic mentoring style integrates good science with a multitude of other skills necessary to succeed in today’s research environment. This includes being strategic in research direction, creating networks, developing niche research areas, and being ahead of the game—all critical to attract sustained funding. His vision saw the creation of the new Regional Climate Section in MMM—an interdisciplinary mix of young atmospheric and social scientists, engineers and statisticians—with the goal to understand the interactions between society and high- impact weather and climate. This section grew from a team of four in 2010 to fourteen in 2014 and provides a supportive environment for young scientists to grow, network, and interact easily across disciplines and societal communities. Greg's mentorship has ultimately created a bolder, more relevant UCAR.

Education and Outreach Nominations

Lorrie Alberta (COMET), Alan Bol (COMET), Patrick Dills (COMET), Bruce Muller (COMET), Malte Winkler (COMET), Bill Bua (COMET), Bob Bubon (COMET), Steve Deyo (COMET), Lon Goldstein (COMET), Bryan Guarente (COMET), Hildy Kane (COMET), Matt Kelsch (COMET), Dolores Kiessling (COMET), Ken Kim (F&A/ITENG), Gary Pacheco (COMET), David Russi (COMET), Tsvetomir Ross-Lazarov (COMET), Andrea Smith (COMET), Amy Stevermer (COMET), and Marianne Weingroff (COMET)

This nomination is for the 2011 redesign of the MetEd website and expanded scientific content on the site over the last four years. MetEd, originally developed by the COMET Program to serve online geophysical training developed for our sponsors, has evolved into a free collection of hundreds of training lessons providing access to enhanced features to better serve the greater UCAR Community. As of October 1, 2014, the site offers 350 unique, high quality training modules providing over 800 hours of training and 35,000+ media elements to a worldwide audience of over 354,000 registered users. The training available through MetEd by itself is an impressive and continually growing collection of scientific content. This nomination highlights the actions taken by our team since 2011 to develop training on a wider range of topics and to further enhance the functionality of the website so that the content can be better utilized by the UCAR community as well as by educators, students, and scientists around the world. These actions include the complete redesign of the site to improve organization of content, enhancement of the registration and tracking system, a robust new search engine, expanded distance learning courses, teaching resources for incorporating MetEd content in the classroom, and new quiz functionality that allows for feedback. 

Olga Wilhelmi (RAL), Jennifer Boehnert (RAL), and Kevin Sampson (RAL)

These nominees have worked as a team to enable students, scientists, practitioners and public officials worldwide to more effectively use Geographic Information System (GIS) tools to improve their research, analysis and real-world decision making. Through community workshops, scientific colloquia, and focused training events, the GIS team is helping atmospheric scientists learn how to use GIS approaches, tools, and data to bring many previously unavailable physical, ecological and social data streams to bear on their research. Through workshops, tutorials and the Internet-based applications, such as the GIS Climate Change Portal, they are making research data available and useful to policy and decision makers throughout the world. The end result is that researchers and decision-makers have become much more adept at using GIS to address climate and weather related mitigation, adaptation and impact issues.

Alison Rockwell (EOL)

As the provider of the majority of NSF’s Lower Atmospheric Observing Facilities (LAOF), EOL routinely conducts international and domestic field campaigns. While these campaigns provide an excellent opportunity to carry out public engagement and educational activities in parallel with the conduct of science itself, such activities have until recently been the responsibility of the science team Principal Investigators (PIs) as part of the broader impacts of a funded science proposal. Over the last five years, however, Alison has single-handedly developed the EOL Program for Education and Public Engagement to help PIs implement targeted education and outreach activities as part of their field campaigns. She tailors activities to the research being performed, the needs of each science team and their level of participation, as well as the make-up of and opportunities within each campaign’s host community. The goals of these activities are to stimulate public interest in the wide range of scientific questions that are addressed through fieldwork; to capture the imagination of the public and students of all ages; and to reach out and help increase the number of “science appreciators” who are essential to continued national investment in science. Alison’s ideas, hard work and enthusiasm have not only earned her the respect of scientists and NSF Program Officers but have also significantly raised the visibility of NSF-funded and NCAR-supported research around the world, and have enhanced the public’s understanding of science.

Janice Kauvar (CISL, posthumous), Rich Loft (CISL), Marijke Unger (CISL), Susan Cross (CISL), Stephanie Barr (CISL), Kristin Mooney (CISL), Jim Vandyke (CISL), Teri Eastburn (UCP/UCSE), Marc Mueller (UCP/UCSE), Brian Bevirt (CISL), Tim Barnes (UCP/UCSE), Bryan Shader (University of Wyoming)

The NWSC project was the result of a partnership spanning the private sector, state government, academic institutions, non-profits, and NCAR/UCAR, with the sponsorship and support of the National Science Foundation (NSF). The NSF, Wyoming-based partners, and NCAR all understood that the NWSC presented a unique opportunity, as one of the largest facilities of its kind in an EPSCoR1 state, to perform a transformative educational and community relations role, in addition to serving its scientific mission. To this end, a cross-cutting team comprising Education, Outreach, and Training (EOT) staff from CISL, NCAR, UCAR, the Wyoming State EPSCoR Office, the University of Wyoming, and other Wyoming educators collaborated to create an educational experience for all NWSC visitors, designing displays, creating content, overseeing construction, and ensuring effective engagement on a tight, six-month timeline. The project was completed on time and on budget, and the results have exceeded expectations: as of September 2014, the exhibit has hosted nearly 5,000 visitors, including over 34 student groups and more than 60 adult professional and social organizations since the facility’s Grand Opening in October 2012.

Diversity Nominations

Vidal Salazar (EOL)

Vidal's nomination is in recognition of his ongoing and sustained commitment to capture the curiosity and imagination of Hispanic students by creating STEM-related experiences that speak to students’ particular interests and abilities. In a nation that is keenly aware of the underrepresentation of Hispanics in many Science, Technology, Engineering, and Mathematics fields, Vidal has joined the community of STEM professionals who are willing to contribute their knowledge, time and skills to mentor and inspire Hispanic youth, and to connect them with career paths that are available to them in an increasingly technology-intensive economy. The basis for this nomination is the work that Vidal has carried out in the last three years as part of a proposal that was funded by NCAR’s Diversity Committee to organize and lead a range of extracurricular activities related to science and technology for Hispanic high school students. These activities are but one example of Vidal’s efforts and underlying belief that the work of NCAR must be shared with and engage the next generation of Hispanic students in the Boulder/Denver area.

Rebecca Haacker-Santos (UCP/UCSE)

Rebecca's nomination is for her outstanding accomplishment in increasing UCAR’s direct impact on increasing the diversity of the geoscience workforce, and for strategically setting in motion a sea change in how internships mentor and retain underrepresented students through educating and supporting faculty across the nation. Rebecca’s impact has grown from 20 students per year in the SOARS internship program to more than 160 faculty and one thousand undergraduates per year. Currently about 40 percent of doctoral degrees in the atmospheric sciences earned by underrepresented groups come from the SOARS program, and this number is rising. In addition, Rebecca has strategically expanded the diversity-focused SOARS program into a more broadly impacting SOARS Center for Undergraduate Research by: (1) adapting and expanding the SOARS model to new SOARS programs that focus on community colleges and high school students, first-generation students, and veterans; (2) mentoring a growing cohort of SOARS alumni for years after the program through graduate school and beyond; (3) working with other labs on building SOARS-like diversity internship programs; (4) speaking and publishing to national and international geoscience audiences on diversity strategies; and (5) leading efforts to train the nation’s geoscience faculty on increasing diversity through high-quality workshops, conference sessions, and online resources. As a result, Rebecca has become a respected and influential leader on broadening participation in the atmospheric science workforce nationally and has positioned UCAR as a renowned leader in serving the university community in diversity priorities in the geosciences. 

Scott Landolt (RAL)

Scott's nomination recognizes his work in advancing diversity at NCAR/UCAR through the creation and implementation of significant educational opportunities for high school students. Over the past five years Scott has played a key role in bringing students from diverse backgrounds to UCAR for summer internships. He has led the effort to secure funding from both the NCAR and RAL Directors' Diversity Funds to create these opportunities, assisted in selecting students, taken the lead in finding mentors, and provided hands­-on guidance to both students and mentors to ensure that the internships have been meaningful. Since 2010, more than 50 high school students from the U.S. and Puerto Rico have participated in the high school programs described more fully in the detailed nomination.

Scientific and/or Technical Advancement Nominations

Eric Apel (NESL/ACD), Alan Hills (NESL/ACD), Rebecca Hornbrook (NESL/ACD), Steve Gabbard (NESL/ACD), and Daniel Riemer (University of Miami)

The development of the Trace Organic Gas Analyzer (TOGA) was completed in 2011 as the result of a collaborative Major Research Equipment proposal by NCAR and the University of Miami, funded by NSF (Eric Apel, PI, and Daniel Riemer, Co-PI). The proposal objective was to build an aircraft-based system to measure a wide range of VOCs in near real time. VOCs are gas-phase compounds based on carbon-atom skeletons, and are of central importance to air quality and climate. Together with nitrogen oxide radicals and sunlight, they produce ozone and organic aerosols, both major components of air pollution and climate forcing agents. The TOGA team conceptualized, designed, and built the instrument which was specifically intended to be deployed aboard the NCAR GV aircraft but is adaptable to other aircraft platforms. An ambitious aspect of the development was to design the system to simultaneously measure a suite of 70+ VOCs ranging from compounds containing one to ten carbon atoms and to measure different compound classes ranging from polar compounds (e.g., formaldehyde and alcohols) to non-polar species (hydrocarbons and halogenated compounds including CFCs and HCFCs, important ozone depleting species and greenhouse gases). This effort was successful technically and has had a large scientific impact within and beyond NCAR. TOGA is a unique instrument that allows for examining the atmospheric chemical composition in unprecedented detail and it has been deployed on five major scientific missions (see below) with nearly 100 percent data coverage. In collaboration with NCAR EOL, TOGA is part of an NSF requestable instrument suite available to the community and in great demand.

Jim Ranson (EOL), Cynthia Bradley (EOL), Steve Rauenbuehler (EOL), Karl Schwenz (EOL), Bradley Foote (EOL), Dave Allen (EOL), Vince Grow (EOL), Walt Hodshon (EOL), Tom Wissman (EOL), Bart Woodiel (EOL), and Chris Mahan (EOL)

Scientific programs from all over the world rely on EOL's Design and Fabrication Services (DFS) facility to create innovative engineering solutions and to provide highest-quality machining services for unique and specialized instruments and infrastructure used on every imaginable research platform. This nomination is in recognition of DFS’s sustained efforts as “enablers of science” to meet the needs and requirements of scientists in the atmospheric community. The nomination highlights two remarkable efforts where DFS’s contribution was instrumental in each agency’s programmatic success and overall reputation: the design and fabrication of the automated Global Hawk Airborne Vertical Atmospheric Profiling System (AVAPS) as part of NOAA’s Unmanned Aircraft System (UAS) program; and the certification and fabrication of the wing stores in support of the German Aerospace Agency (DLR) High Altitude and Long Range Research Aircraft (HALO) program.

Piyush Agrawal (CU), Justus Brosche (CU), Greg Card (HAO), Rebecca Centeno-Elliott (HAO), Clemens Halbgewachs (University of Freiburg), Bruce Hardy (consultant), Michael Knölker (HAO), Alice Lecinski (HAO), Ron Lull (HAO), Chris Mahan (EOL), Courtney Peck (CU), Jim Ranson (EOL), Rich Summers (HAO), and Tom Wissman (EOL).

The Sunrise balloon-borne observatory produced the highest-resolution images ever taken of the Sun. Engineers and scientists in HAO and EOL worked with international partner institutions and the NASA Columbia Scientific Balloon Facility to win two science proposals totaling more than $6 million to realize two science flights of Sunrise. The objective of the NCAR effort was threefold: 1) to develop a gondola observing platform that was strong enough to protect the delicate one-meter Sunrise primary mirror and post-focus scientific instrumentation; 2) to design an agile and intelligent control system that would maintain solar pointing accuracy to within one-tenth of an arc second for prolonged periods of time in the harsh wind shears of the Earth's stratosphere; and 3) to bring the mirror, instruments, and valuable science data safely to the ground again. The NCAR team that designed, built, rebuilt, and flew the gondola and pointing system has enabled groundbreaking observations of the Sun at spatio-temporal resolutions never before achieved.

Linda Mearns (CISL), Seth McGinnis (CISL), Don Middleton (CISL), Eric Nienhouse (CISL), Nathan Hook (CISL), and Chi-Fan Shih (CISL)

The North American Regional Climate Change Assessment Program (NARCCAP) addresses the challenges inherent in producing useful climate model results at a regional scale for climate scientists, impacts researchers, statisticians, and others concerned with future climate over North America. Global climate models perform simulations at relatively coarse resolutions when used to study long-term climate change. One way of producing results at higher spatial resolutions (e.g., 50 km) is to drive regional climate models over part of the globe with results from global models. The global models supply large-scale information and the higher resolution regional models provide more detail. Higher resolution is desirable for better understanding of atmospheric processes and for use in climate impacts and adaptation studies that require such detail. While using regional models produces useful information, additional uncertainties are also revealed. NARCCAP explored these uncertainties through application of multiple regional climate models, driven by multiple global models for current and future conditions over the North American domain. It also produced multiple climate change scenarios for use by the climate impacts and adaptation communities, and further evaluated the performance of global and regional climate models. A large volume of data (~40 terabytes) was produced and made available to the larger climate research community along with background documentation and recommendations for appropriate use. The resulting body of research reflects important new information about regional climate change and its possible impacts. The value of NARCCAP's data products has been demonstrated, among other ways, by its widespread use across the targeted research communities, with 1,000 users registered, over 120 scientific publications produced, and over 1,000 citations to date.