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AC GEO - Member Bio-Sketches


B.S., high honors, Emory; M.P.A., Harvard (top honors in program); J.D., magna cum laude, Georgetown. Vicki Arroyo is the Executive Director, Georgetown Climate Center and Assistant Dean, Centers & Institutes, Professor from Practice, Georgetown Law, where she is also a Visiting Professor. She oversees the Center’s work at the nexus of climate and energy policy, supervising staff and student work on climate mitigation and adaptation at the state and federal level. She previously served at the Pew Center on Global Climate Change, most recently as the Pew Center’s Vice President for Domestic Policy and General Counsel. For over a decade, she directed the Pew Center’s domestic policy program as well as managing the Center’s work on science, environmental impacts, and economics. Professor Arroyo served as Managing Editor of the Center’s book, Climate Change: Science, Strategies, and Solutions. In addition to Georgetown Law, she has taught courses on environmental policy and climate change at Catholic University, George Mason University’s graduate public policy program, and Tulane Law School. Previously, she practiced environmental law with Kilpatrick Stockton in Washington DC and other firms and served in two offices at U.S. EPA: the Office of Air and Radiation and the Office of Research and Development, where she reviewed development of standards under the Clean Air Act. From 1988 to 1991, she created and directed the Louisiana Department of Environmental Quality’s policy office, and also served during some of that period as Governor Buddy Roemer’s environmental advisor. Professor Arroyo has served on several federal panels, including those reviewing economic modeling of climate legislation (DOE’s Energy Information Administration) and on climate change adaptation along Gulf Coast (Climate Change Science Program). She currently serves on the Advisory Council to National Center for Atmospheric Research, on a National Academy of Sciences/Transportation Research Board panel on reducing greenhouse gas emissions from transportation, and on California’s Economics and Allocation Advisory Committee. She serves on editorial boards of the Climate Policy journal and The Georgetown International Environmental Law Review. As a student at Georgetown, Professor Arroyo served as GIELR’s Editor-in-Chief.
(Term Expires: 2016)


Dr. Bierman is a professor of geology and natural resources at the University of Vermont.  Bierman received his B.A. in Geology from Williams College and his graduate degrees from the University of Washington.  He is a geomorphologist and geochemist with interests focusing on rates of weathering and denudation as well as geologic dating. For more than two decades, Bierman has examined earth surface processes at scales ranging from micron-thick coatings of rock varnish to the evolution of Australian, African, and Arctic landscapes.  His research expertise includes the application of cosmogenic nuclides to a wide variety of geomorphic settings and problems including measuring the rate of bedrock weathering, dating changes in the Greenland Ice Sheet, constraining the age of sea-level changes over the Quaternary, and developing techniques to estimate background rates of sediment generation for management of disturbed landscapes.  He has worked around the world including South Africa, Namibia, Israel, Brazil, Greenland, Arctic Canada, Australia, and much of North America. 

Bierman directs the University of Vermont Cosmogenic Nuclide Extraction Lab — one of only a handful of laboratories in the country dedicated to the preparation of samples for analysis of 10-Be and 26-Al from pure quartz (http://uvm.edu/cosmolab). In 1996, Bierman was the recipient of the Geological Society of America’s Donath Medal as the most promising young geologist in the country.  He was also the recipient of NSF’s Director’s Award for Distinguished Teaching Scholars, in 2005.  Bierman has served on numerous National Science Foundation review panels, has been associate editor of the Geological Society of America Bulletin, and has served as chairperson of the 1,500-member Quaternary Geology and Geomorphology Division of the Geological Society of America.  Bierman has been primary advisor to 5 Ph.D. and 26 MS students.

Bierman, working with his collaborators and graduate students, has published 81 papers in refereed journals and presented more than 225 meeting abstracts. Bierman is the lead author of a new Geomorphology textbook to be published in 2012 and is the junior author for two editions of an Environmental Geology textbook.  He has published nine peer-reviewed book chapters relating to landscape change and the application of cosmogenic nuclides to problems in Earth Surface Processes.
(Term Expires: 2016)


Catherine Constable is a professor of geophysics in Scripps’s Cecil H. and Ida M. Green Institute of Geophysics and Planetary Physics .  Constable’s research is concerned with Earth’s magnetic field. She is particularly interested in decadal to million year variations in the geomagnetic field and how the changing structure of the magnetic field and events like geomagnetic reversals can inform scientists about processes in Earth’s deep interior. Constable also uses recent satellite magnetic field observations to study the electrical conductivity of Earth’s mantle. She is an active proponent of the development of databases and cyberinfrastructure allowing electronic access to paleomagnetic and rock magnetic data and an author on more than 80 peer-reviewed scientific articles. (Term Expires: 2017)


Dr. Dixon is a Professor of Anthropology (Archaeology) and Director, Maxwell Museum of Anthropology at the University of New Mexico. His areas of research include Arctic archeology, Paleoindian archeology, Quaternary paleoecology, high altitude - high latitude adaptations, museum studies. (Term Expires: 2017)


Dr. Doney is a senior scientist in the Department of Marine Chemistry and Geochemistry at WHOI. He graduated with a PhD from the Massachusetts Institute of Technology/Woods Hole Oceanographic Institution Joint Program in Oceanography in 1991 and was a postdoctoral fellow and later a scientist at the National Center for Atmospheric Research, before returning to Woods Hole in 2002. He was awarded the James B. Macelwane Medal from the American Geophysical Union in 2000, an Aldo Leopold Leadership Fellow in 2004, and the WHOI W. Van Alan Clark Sr. Chair in 2007. His science interests span oceanography, climate and biogeochemistry. Much of his research focuses on how the global carbon cycle and ocean ecology respond to natural and human-driven climate change, which may act to either damp or accelerate climate trends. A current focus is on ocean acidification due to the increase in the ocean of carbon dioxide and other chemicals from fossil fuel burning. He is currently the chair of the U.S. Ocean Carbon and Biogeochemistry Program and the U.S. Ocean Carbon and Climate Change Program. (Term Expires: 2016)


Dr. Fine’s research focuses on understanding the role of the ocean in climate change occurring on time scales of up to decades. It involves understanding the physical processes that influence the capacity of the ocean to take up atmospheric constituents, such as carbon-dioxide a greenhouse gas, and oxygen which ventilates the ocean. (Term Expires: 2017)


Jose D. Fuentes is a professor on Meteorology at Penn State University. His research focuses on the processes controlling emissions, atmospheric transport, and chemical transformations of hydrocarbon compounds. Field studies focus of the oxidation of hydrocarbons and the formation of oxidants and secondary organic aerosols. Currently, he is the atmospheric sciences editor of Eos (the American Geophysical Union weekly periodical). Also, he serves an associate editor of the journal Agricultural and Forest Meteorology. (Term Expires: 2018)


Greg Hakim is the Chair of Atmospheric Sciences, and works to understand what the climate is doing now and will do in the future by reconstructing what it did in the past. To do this, he combs through the historical record for those sparse and noisy proxies of the state of the climate at different times. With those proxies, he is able to get view into the past far beyond the instrumented record, which goes back only about 150 years. Additionally, he also builds models to describe dynamic weather events, such as cyclones and hurricanes. With James Holton, he is the author of An Introduction to Dynamic Meteorology, now in its fifth edition. (Term Expires: 2018)


Kip Hodges specializes in multidisciplinary studies of the evolution of orogenic systems. His research tools are drawn from the fields of structural geology, regional tectonics, metamorphic and igneous petrology, isotope geochemistry, geochronology, and geomorphology. His field areas have included Baja California; the East Greenland, Irish, and Norwegian Caledonides; the U.S. sector of the North American Cordillera; and the Peruvian Andes. For the past quarter-century, much of his research has focused on the Himalaya and Tibet. In addition to his role as Founding Director of SESE, Hodges serves as the scientific director of ASU's Noble Gas Geochemistry and Geochronology Laboratories. These state-of-the-art facilities are designed to support a wide range of tectonics and geochemical studies, with special emphasis on the design and implementation of advanced analytical instrumentation for (U-Th)/He and 40Ar/39Ar geochronology and thermochronology. (Term Expires: 2017)


George M. Hornberger is Distinguished University Professor at Vanderbilt University, where he is the Director of the Vanderbilt Institute for Energy and the Environment. He has a shared appointment as the Craig E. Philip Professor of Engineering and as Professor of Earth and Environmental Sciences there. He previously was a professor at the University of Virginia for many years where he held the Ernest H. Ern Chair of Environmental Sciences. He also has been a visiting scholar at the Australian National University, Lancaster University, Stanford University, the United States Geological Survey (USGS), the University of Colorado, and the University of California at Berkeley.

His research is aimed at understanding complex water-energy-climate interrelationships and at how hydrological processes affect the transport of dissolved and suspended constituents through catchments and aquifers. He is an ISI "Highly Cited Researcher" in environmental sciences and engineering, a recognition given to the top 250 individual researchers in each of 21 subject categories. Hornberger is a fellow of the American Geophysical Union (AGU), a fellow of the Geological Society of America, and a fellow of the Association for Women in Science. He was President of the Hydrology Section of AGU from 2006-2008. He has been a member of the Nuclear Waste Technical Review Board (a Presidential appointment) since April 2004. He has served on numerous boards and committees of the National Academies, including as chair of the Commission on Geosciences, Environment, and Resources (1996-2000) and chair of the Board on Earth Sciences and Resources (2003-2009). Professor Hornberger won the Robert E. Horton Award (Hydrology Section) from the AGU in 1993.

In 1995, he received the John Wesley Powell Award from the USGS. In 1999, he was presented with the Excellence in Geophysical Education Award by the AGU and in 2007 he was selected Virginia Outstanding Scientist. Professor Hornberger is a member of the U.S. National Academy of Engineering, having been elected in 1996.
(Term Expires: 2016)


Dr. Kempton joined Geology as Head of Department in the autumn of 2013. She comes to K-State from the U.K. Natural Environment Research Council, the U.K. equivalent of the U.S. National Science Foundation, where she served as Head of Research and Director of Science.  She holds a doctorate in igneous petrology and a master's degree in sedimentology from Southern Methodist University.  Personal research interests to date have focused on the petrology and geochemistry of oceanic basalts and gabbros, lower crustal granulites, ultramafic peridotites and continental volcanism, with a specific focus on problems of mantle geodynamics, petrogenesis of basaltic magmas, and the evolution of the lower crust and upper mantle.  Dr. Kempton is also interested in pursuing new research problems in Earth’s Critical Zone, such as quantifying processes that control bedrock breakdown and rates of soil formation, how these processes vary with landscape type, tectonic setting and / or climate. (Term Expires: 2017)


Lyons and his research group currently conduct research on four specific topics: 1. the biogeochemistry of Antarctic terrestrial/aquatic ecosystems and how they response to climate change, 2. the interactions and rates of chemical weathering, erosion/sediment transport and carbon dynamics, especially in small, mountainous watersheds, 3. the impact of urbanization, suburbanization and agricultural activities on water quality, and 4. the geochemical dynamics of carbon in agricultural landscapes. He is a Fellow of GSA, AAAS and AGU. He recently stepped down as the lead investigator of the McMurdo Dry Valleys Long Term Ecological Research program, one of the two Antarctic LTER sites funded by the National Science Foundation. He is a US representative on the Geosciences Scientific Group of the Scientific Committee for Antarctic Research (SCAR), and a former Director of the Byrd Polar Research Center at OSU. He is an associate editor for Chemical Geology and Applied Geochemistry, and a member of AGU's Book Board. (Term Expires: 2017)


Dr. Shirley Pomponi is Research Professor and Executive Director of the NOAA Cooperative Institute for Ocean Exploration, Research, and Technology at Harbor Branch Oceanographic Institute, Florida Atlantic University, in Fort Pierce, Florida. She received her Ph.D. in Biological Oceanography from the University of Miami. Her research focuses on marine biotechnology, in general, and sponge systematics, cell and molecular biology, in particular. She has authored or co-authored more than 100 peer-reviewed scientific publications and is co-inventor on several patents. She has led numerous research expeditions worldwide and has made more than 300 dives in Harbor Branch’s Johnson-Sea-Link submersibles. Dr. Pomponi is immediate Past-President of the Southern Association of Marine Laboratories, and immediate past- Chair of the Florida Institute of Oceanography Council. She is a member of the Florida Oceans and Coastal Council, the U.S. National Committee for the Census of Marine Life, the National Association of Marine Laboratories, and the Southeast Coastal Ocean Observing Regional Association.


Kimberly Prather is the Distinguished Chair in Atmospheric Chemistry at Scripps Institution of Oceanography and the Department of Chemistry and Biochemistry at UC San Diego.  Prather’s research focuses on understanding the impact of atmospheric aerosols and their impacts on clouds and climate. Early in her career, she developed a technique known as aerosol time-of-flight mass spectrometry that is widely used in atmospheric field studies around the globe to determine the origin and chemistry of aerosols.  A major focus of her research involves understanding how aerosols impact climate, with a major focus on their role in modifying clouds and precipitation processes. (Term Expires: 2017)


Dr. Semeter ia as an Associate Professor of Electrical and Computer Engineering at Boston University.  His research concerns interactions between the Earth’s ionized outer atmosphere (the ionosphere) and the space environment.   Activities in Dr. Semeter’s lab include the development of optical and magnetic sensor technologies, radar experiment design and signal processing (with focus on incoherent scatter radar), and the application of tomographic and other inversion techniques to the analysis of distributed, multi-mode measurements of the space environment. (Term Expires: 2017)


Dr. Stroeve is a Senior Research Scientist at the National Snow & Ice Data Center (NSIDC), a U.S. information and referral center that supports polar and cryospheric research.  Her specialties include remote sensing of snow and ice in the visible, infrared, and microwave wavelengths. (Term Expires: June 2017)


Dr. Sullivan is a Professor & Associate Chair for Graduate Education in the Department of Physics at the University of Maryland.    His research area is particle physics.   The Maryland Particle Astrophysics group is involved in three pioneering experiments in this exciting field. The water Cerenkov detector, called Milagro, the Super Kamiokande experiment which is designed to study nucleon decay, solar neutrinos and supernovae neutrinos and our newest endeavor, the IceCube Experiment which is a one-cubic-kilometer international high-energy neutrino observatory being built and installed in the clear deep ice below the South Pole Station. (Term Expires: 2017)


Dr. Cindy Lee Van Dover is a deep-sea biologist with an interest in the ecology of chemosynthetic ecosystems.  She began her work in this field in 1982, joining the first biological expedition to hydrothermal vents on the East Pacific Rise.  After earning a Master’s degree in ecology from UCLA in 1985, she continued her graduate education in the MIT/Woods Hole Oceanographic Institution Joint Program in Biological Oceanography.  There she joined numerous expeditions and published on diverse topics such as reproductive strategies and recruitment of vent invertebrates, vent food webs, and taxonomic descriptions of new species.  In 1989, she described a novel photoreceptor in a vent invertebrate, which in turn led to discovery and characterization of a geothermal source of light at vents and investigations of its biological significance.  On receiving her Ph.D. in 1989, Van Dover joined the group that operates the deep-diving submersible ALVIN.  She qualified as pilot in 1990 and was pilot-in-command of 48 dives; she now serves as Chair of the Oversight Committee for a new, state-of-the-art human-occupied deep-submergence vehicle.  Her work with ALVIN has taken her to nearly all of the known vent fields in the Atlantic and Pacific, as well as to deep-water seamounts, seeps, and other significant seafloor features.  Her current research focuses primarily on deep-ocean exploration and the study of biodiversity and biogeography of invertebrates from chemosynthetic ecosystems. She has published more than 90 articles in peer-reviewed journals and is an active participant and Chief Scientist in NSF-and NOAA-sponsored field programs to hydrothermal vents and other chemosynthetic environments.

Professor Van Dover is a Fulbright Scholar, the inaugural recipient of the Mines Medal for “her exceptional leadership and innovation”, and Fellow of the American Association for the Advancement of Science. She is currently the Harvey W Smith Professor of Biological Oceanography in the Division of Marine Science and Conservation of the Nicholas School of the Environment, Duke University, where she serves as Chair of the Division, Director of the Undergraduate Certificate in Marine Science and Conservation, and Director of the Marine Laboratory. (Term Expires: 2018)


David Voorhees is an Associate Professor of Earth Science and Geology  at  Waubonsee Community College at the Sugar Grove Campus in Sugar Grove, Illinois.   His primary professional interests are in geoscience education, specifically bringing the vastness and complexity of the earth to students both in and out of the classroom.  He is also a Principal Investigator for NSF STEM Scholarship Faculty Advisor for Students Organizing Sustainability (SOS). (Term Expires: 2017)


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