PEI Research and Technical Staff  
 
PEI has five active research centers and groups, the Princeton Climate Center (PCC), part of the Cooperative Institute for Climate Science (CICS), the Center for Environmental Bioinorganic Chemistry (CEBIC), the Center for Biocomplexity (CBC), the Carbon Mitigation Initiative (CMI), and PEI’s Energy Group. Each research center has research and technical staff affiliated with it, many of whom have offices in PEI’s space in Guyot Hall. Most of these scientists are exploring one or more aspects of global climate change.

Many of the postdoctoral research associates who have recently obtained their Ph.D.s and who are acquiring additional training with PEI faculty, participate in the interdisciplinary PEI Fellows Program. The fellows meet monthly to present their research to each other and to discuss the challenges of launching their careers. This is a unique opportunity for these young scientists to forge ties across disciplines with researchers and faculty from other departments and programs who focus on environmental problems.

The research and technical staff members’ research interests follow.

PEI's Postdocs
Ray Dybzinski (PEI) researches the mechanisms that structure plant communities with methodological emphasis on the interplay between quantitative mathematical theory and observations/experiments. He is currently working with Dr. Steve Pacala on an analytically tractable model of nitrogen-and light-limited forest dynamics using the Pacala lab's framework for modeling forest light competition. He received his PhD from the University of Minnesota in 2007.

Roger Stern (CNES/PEI) is an economic geographer as well as an energy and national security analyst. He holds the PhD in Engineering from John Hopkins University. His research concerns the national security consequences of US believe in the 'oil weapon', which Stern asserts is largely imaginary.

Princeton Climate Center (PCC)/Cooperative Institute for Climate Science (CICS)
Stefan Gerber received his PhD from the University of Bern in Switzerland. He is working with Lars Hedin, EEB, and Michael Oppenheimer, WWS on the implementation of a terrestrial Nitrogen cycle in the GDFL's earth system model. The application of such a model helps to address a variety of questions ranging from nutrient limitation to the fate of anthropogenic emissions of reactive nitrogen.

Sergey Malyshev's primary research interest is the problems of interaction between the surface and the atmosphere and its consequences for the climate of the earth. He is especially interested in long-term variations of the climate, how they are connected with long-term variations of surface properties and what feedbacks are involved in the process. Malyshev works with Prof. Steve Pacala in EEB.

Ni-Zhang Golaz has worked on various research projects, including Topical Ocean-Global Atmosphere (TOGA) Program and conducted field work on several international scientific research cruises; also worked on atmospheric boundary layer meteorology and atmospheric trace gases such as CH4, CO and CO2; is familiar with both experimental work and computer modeling field. Currently she is working with Steve Pacala on terrestrial carbon cycle with a focus on the atmospheric CO2 fluxes and concentrations. Research involves numerical modeling and statistical data analysis.  http://www.princeton.edu/~ngolaz

Elena Shevliakova's research is focused on modeling biosphere-atmosphere interactions and applications of such models to the issues of global environmental change. Currently she is working with Steve Pacala on the implementation of a dynamic land surface model for the GFDL-Princeton Earth modeling system. This system will be used to address a variety of questions such as analysis of impacts of climatic change and anthropogenic land-use practices on the regional distribution and dynamics of CO2 sources and sinks in different regions of the world.

Center for Biocomplexity
Ford Ballantyne received his PhD from the University of New Mexico in 2003. He is working with Simon Levin and Lars Hedin in the Department of Ecology and Evolutionary Biology. Ford's main research focus is modeling carbon, nitrogen, and phosphorous stoichiometry in marine and terrestrial ecosystems but he is also interested in mean-variance scaling of species abundance and community dynamics.

Frederic Bartumeus received his PhD in Biology from the University of Barcelona (Spain) in 2005. His dissertation was entitled " Lévy processes in animal movement and dispersal". His background is in limnology and theoretical ecology, mainly using complex system approaches. His research interests are on the study of animal movement and dispersal, at different scales and based on different methodologies. Currently, Frederic is working with Simon Levin at the Department of Ecology and Evolutionary Biology on the understanding of the origins and consequences of intermittence and fractality in animal movement and dispersal. The question is addressed from an evolutionary and ecological perspective but based on statistical mechanics insights. New linkages between search strategies, optimal foraging theory and macroscopic diffusive properties of motion are expected.

Luca A. Giuggioli's received his PhD from the department of Physics at the University of New Mexico in 2004. The dissertation work concentrated on transport theory. His main research area is on the emergence of patterns at the animal population level from individual level interactions and its application to epidemic disease spread and home range formation. Of particular interests is the development of mathematical formalisms in animal ecology that go beyond the diffusion approximation, the so-called phenomenon of anomalous diffusion. Other research areas have to do with studies of molecular biological evolution and their relation to the statistical properties of DNA. lgiuggio@princeton.edu


Jinhu Lu received his PhD in applied mathematics from Chinese Academy of Sciences in 2002. He is currently working with Simon Levin of the Department of Ecology and Evolutionary Biology. His research interests include collective behaviors in animals, community structure and information transfer in biological systems, biocomplexity and biodiversity, complex dynamical networks, network dynamics, and network structure. http://lsc.amss.ac.cn/~ljh

Maciej Boni's research focuses on the public health consequences of the evolution of infectious diseases. He has studied antigenic drift in the influenza virus and the evolution of antibiotic resistance in bacteria, and his work analyzes the fundamental mechanisms that drive these processes so that policy can be formulated with some knowledge as to its effects on the evolution of the disease in question. In addition, Boni has contributed to the statistical theory required for identifying recombinant viruses and bacteria; recombinant pathogens are often implicated in resistance evolution, virulence evolution, and in the case of influenza, potentially pandemic strains. His work has enabled the searching of large databases for potentially novel and dangerous disease strains.
Boni currently works with Ramanan Laxminarayan (Resources for the Future) and David L. Smith (University of Florida) on the economic and ecological challenges to developing effective malaria treatment strategies. He is a Resident Scholar at Resources for the Future and has active collaborations with researchers at Penn State's Center for Infectious Disease Dynamics, the University of Chicago, Queen's University (Ontario), the University of Vigo (Spain), the Institute for Research and Development (France), and the University of Queensland (Australia).

Michael Raghib  received his PhD in applied mathematics from the University of Glasgow in 2006.  His dissertation was entitled "Point Processes in Spatial Ecology".  Michael is working with Simon Levin in Ecology and Evolutionary Biology.  He is interested in stochastic models and their deterministic approximations for spatially and physiologically structured populations, problems of dispersal in individuals and collectives using methods from anomalous diffusion and fractional dynamics (with Yannis Kevrekidis ), and more recently bioinformatics and metagenomics (with J.Dushoff and J.Weitz). http://www.princeton.edu/~mraghib/

Carbon Mitigation Initiative
Nicolas Cassar received his Ph.D. from the School of Ocean and Earth Science and Technology (SOEST) at the University of Hawai‘i in 2003. His dissertation was on the influence of carbon-concentrating mechanisms and ß-carboxylation on marine photosynthetic carbon isotope fractionation. He is currently working with Michael Bender (Department of Geosciences) on atmospheric oxygen. In conjunction with atmospheric carbon dioxide measurements, O2/N2 can be used to better understand the global carbon cycle and, more specifically, the mechanisms by which some of the anthropogenic carbon dioxide is removed from the atmosphere (land biosphere vs. ocean).

Steffen Hertog received his PhD in politics from the University of Oxford, working on the political economy of Saudi Arabia. He is one of two post-doctoral associates in the interdisciplinary working group on Oil, Energy and the Middle East, and works with Profs. Pacala and Socolow in the PEI. His current research interests include the history of oil policy making in Saudi Arabia and comparative political mobilization on the Arabian Peninsula.

Samir Succar received his MSE in Electrical Engineering from Princeton University in 2003. He is currently researching implementations of large-scale wind coupled to energy storage as a strategy for enhancing transmission infrastructure utilization and mitigating wind's variability. Other topics include the competition of large-scale wind with other low-carbon technologies such as coal IGCC with CCS under various climate mitigation policy scenarios.

The Center for Environmental BioInorganic Chemistry (CEBIC)

Adam Kustka received his PhD. from SUNY Stony Brook in 2002. His dissertation was entitled: Iron nutrition and metabolism in the marine diazotrophic cyanobacterium, Trichodesmium spp. With Francois Morel, Geosciences, he will be investigating the mechanisms of iron reduction and uptake in marine phytoplankton.

Patrick McGinn completed his Ph.D. in 2003 at the Australian National University in Canberra. At ANU, he investigated certain molecular and physiological aspects of the CO2-concentrating mechanism (CCM) in model freshwater cyanobacteria. His research has broadened in scope and is now concerned primarily with deepening our understanding of the potential consequences of increasing atmospheric CO2 on the activity and regulation CO2 and HCO3- assimilation in diatoms and marine cyanobacteria, arguably the two most important players in the marine carbon cycle. Under the direction of Dr F. Morel, Patrick is currently applying detailed real-time PCR approaches to explore the potential for CO2 limitation and repletion to regulate the expression of genes involved in a C4 mode of carbon acquisition in the model diatom Thalassiosira pseudonana and other strains. This effort has been greatly simplified with the recent publication of the entire genome sequence for this organism (http://genome.jgi-psf.org/).