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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 of the Georgetown Climate Center based at Georgetown University Law Center, 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: 2015)


Dr. Barth is a Senior Scientist with the NCAR Earth System Laboratory. She specializes in the effects of clouds on the chemistry of the atmosphere. Her research, which uses both computer simulations and observations of the atmosphere, focuses on such questions as how clouds and lightning influence airborne chemicals, including water vapor and ozone. Such work can advance our understanding of climate change as well as the atmospheric processes that shield Earth from incoming ultraviolet radiation. Barth is a principal investigator on a field campaign, known as DC3, that will use aircraft and ground-based instruments to better understand the influence of storms on atmospheric chemistry. She divides her time between two NCAR divisions: Mesoscale and Microscale Meteorology and Atmospheric Chemistry.
(Term Expires: 2015)


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: 2015)


Dr. Carr, biological oceanographer, is the Associate Director of the Columbia Climate Center at the Earth Institute, Columbia University in New York City.

To meet the challenge of climate change, Dr. Carr coordinates multi-disciplinary education initiatives and leads research at the boundary of social and physical sciences, including projects that evaluate the impact of government policies on greenhouse gas emissions and responding to claims of those skeptical of climate science. She founded the Columbia Climate Center blog, Climate Matters@Columbia, to meet the Climate Center mission to improve communication between climate scientists and the users of climate information from the general public to policy makers.

Before joining Columbia University, she carried out research in oceanography. As a Research Scientist at Cal Tech's Jet Propulsion Laboratory between 1996 and 2005, she used observations made from satellites and numerical models to quantify the pathways of carbon into and within the ocean. Between 2005 and 2007 Carr was Associate Program Director in Biological Oceanography at the National Science Foundation. She has been a member of the scientific steering committees of the U.S. Ocean Carbon and Biogeochemistry program and the international Integrated Marine Biogeochemistry and Ecosystems Research program. She received her Ph.D. from Dalhousie University and her B.Sc. and M.Sc. from the University of Barcelona.
(Term Expires: 2015)


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: 2015)


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)


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)


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)


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: 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)


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. Taylor has been the dean of the School of Ocean and Earth Science and Technology (SOEST) since July 1, 2006. Taylor had served as acting associate dean of research at SOEST since 1994 and has been a faculty member at UH Manoa since 1982. He has secured more than $8 million in grants and contracts, conducted more than 30 oceanographic research cruises, authored 90 papers and edited nine books. As part of the SOEST leadership team he oversaw Ship Operations, Marine Technicians, Oceanographic Instrumentation, Shipboard Scientific Equipment, and Seafloor Mapping.

Taylor serves on the Board of Governors for the Joint Oceanographic Institutions and the Consortium of Oceanographic Research and Education. He has also exhibited scientific leadership with the western Pacific ALVIN submersible dive program, the continental MARGINS program, the Ocean Drilling Program, and the decadel program of RIDGE 2000 integrated studies in the Lau Basin.

Taylor received his doctoral and master’s degrees in marine geology and geophysics from Columbia University, and a bachelor of science degree in geology and geophysics from the University of Sydney.
(Term Expires: 2015)


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)


Dr. Whittaker is the Dean of the School of Computer, Math and Natural Sciences at Morgan State University. He received his bachelor’s degree in 1982 from Morgan State University and the doctoral degree in Physiology and Biophysics from Howard University in 1988. He then joined the University of Tennessee Health Sciences Center in Memphis, Tennessee as a Postdoctoral Fellow in the Neuroscience Center of Excellence. Dr. Whittaker later joined the faculty of Howard University, and subsequently Morehouse School of Medicine (MSM) in Atlanta, GA, where he served for 14 years in the Departments of Anatomy & Neurobiology as well as Psychiatry & Behavioral Sciences. While at Morehouse, he conducted research in basal ganglia anatomy and physiology and spearheaded an initiative to establish the MSM Developmental Neuroscience Program. This initiative drove the design and construction of the current Neuroscience Institute, the first of its kind in a Historically Black College and University (HBCU), and became a prototype for 12 new NIH-supported Specialized Neuroscience Research Programs currently existing at minority-serving institutions across the United States.
(Term Expires: 2015)

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