My research focus is seismic tomography for imaging the elastic and anelastic properties of the earth in various scales; from meters in environmental, hydrogeological, geotechnical and archaeological problems, kilometers in hydrocarbon exploration targets, up to thousands of kilometers in the study of upper mantle and crust of subduction zones.
This research encompasses different facets of seismic tomography including computational and methodological aspects of the inverse problem, the assessment of uncertainty using high performance computing, forward modeling, as well as the development of algorithms for the extraction of useful information from seismic waveforms. Other interests include Earth's free oscillations, spatio-temporal changes of seismic noise, digitization of old analog seismograms, exploring non-conventional inversion approaches based upon global optimization methods such as genetic algorithms, and studying wave propagation and seismic radiation of earthquakes in the very shallow part of subduction zones that is considered to be aseismic.
Jia Chen joined Prof. Wofsy’s group in Aug. 2011 with a research interest in urban greenhouse gas and pollutant emissions. She works on a method to determine the rates of emissions in cities by measuring the column-averaged gas concentration in the atmosphere, using the sun as light source. This work involves development of compact, mobile, sun-tracking Fourier Transform Infrared Spectrometer (FTIR), atmospheric modeling using mesoscale models (e.g., WRF-GHG), and network design.
Jia Chen received her PhD in electrical engineering at Technische Universität München (Prof. Amann's group) in collaboration with Siemens. She developed hand-held laser-based gas sensors for industrial/household applications, with a focus on modeling of surface-emitting lasers (VCSEL), in-fiber based gas sensing, and efficient signal evaluation. She also worked on transmission method (CDMA) for Powerline Communication System in automobiles for her diploma thesis at Universität Karlsruhe. She is a recipient of the Graduate Student Fellowship Award of IEEE, ITG award of the German EE society VDE and holds several patents related to her PhD and Diploma work.
Carling joined the Mitrovica group in the summer of 2012 after receiving her Ph.D. in physics from the University of Toronto. One of the main goals of Carling’s work is to answer the important climatological question: what are the various contributors to the observed changes in sea level? Her research focuses on using statistical techniques to better understand global mean sea level during current and past warm periods, and to develop the tools necessary to extract source information from historical sea-level records. Understanding how past sea level has changed in response to rising surface temperatures is a critical step in our ability to predict sea-level rise into the next century and beyond.
Research Associate Perez-Mercader Lab, Rowland Institute
Tereza Pereira de Souza is a licentiate in Mathematics by the São Paulo State (IBILCE-UNESP) Brazil. She has obtained her Ph.D. in Biochemistry at the Dept. of Biochemistry, University of São Paulo (USP, Brazil). Thesis: "The analysis of ionic properties in anionic and zwitterionic micelles or cationic vesicles systems: a mean field theoretical approach." Later she worked as a post doctoral fellow at Prof. Pier Luigi Luisi group at Dept of Biology (UNIROMA3 -Italy) developing an experimental approach to the synthesis of proteins inside lipid vesicles using cell-free protein systems. She also worked as post doctoral fellow in the Prof. Alfred Fahr group at Dept. of Pharmaceutical Technology (FSU-Jena, Germany), where she worked with the entrapment of protein and ribosome inside of liposome, as well interactions of polyelectrolyte-membranes, physical chemistry of fatty acid vesicles, and vesicle formation investigations by freeze fracture and cryo-TEM.
Juan Pérez-Mercader earned his Ph.D. from the City College of New York. He is an Elected Member of the International Academy of Astronautics and of the European Academy of Arts and Sciences. In 1998 in Association with the NASA Astrobiology Institute, he founded Spain's Centro de Astrobiología (CAB) of which he was its first Director. He is the architect of Spain's current participation with infrastructure and instrumentation on board Mars Science Laboratory that arrived on Mars in August 2012. He is Profesor de Investigación in Spain's National Research Council (CSIC) and an External Faculty at the Santa Fe Institute. In 2010, he joined Harvard as a Senior Research Fellow in the Department of Earth and Planetary Sciences and the university's Origins of Life Initiative, where he leads a project on the "Top-down Synthesis of an Ex-novo Chemical Artificial Living System".
Jiaping Ruan is a graduate student at Peking University, China. She is a visiting student in Pearson Group for one year from September, 2015. Her research is about using various geochemical tools to study climate change of the geological past.
Jiaheng Shen is a joint graduate student in Ann Pearson’s lab with Chinese Academy of Science. She is interested in the mass extinction, Earth’s environmental history, paleoceanography and especially the relationship between them.
Her recent research is focused on the nitrogen and carbon cycles during the Late Ordovician Mass Extinction using isotopic measurement of porphyrins, the degradation products of chlorophyll, to constrain evolutionary transitions, microbial communities, and ocean chemistry changes associated with the end-Ordovician mass extinction.