I am interested in understanding the impact of anthropogenic activities on the seismic hazards that they might pose for infrastructure and loss of lives. There are a number of human related subsurface activities that might induce earthquakes, such as wastewater disposal, CO2 storage, oil and gas production and the impoundment of large reservoirs.... Read more about Josimar Alves da Silva
My research focuses on developing new tools and constraints to evaluate mathematical models of physical processes and Earth structures. I am currently working to develop new theoretical and observational frameworks to utilize the information about earthquake source processes and Earth structure contained within long-period recordings of seismic energy.
Post-doctoral Fellow Drabon Group Joining Faculty July 2021
My research focuses on the habitability of the early Earth and how it was affected by crustal processes and changing surface environments. The study of the early Earth requires a clear understanding of present-day sedimentary processes as well as an appreciation of the non-uniformitarian character of the early Earth. My research integrates multidisciplinary approaches by applying stratigraphic, provenance and geochemical analyses paired with detailed knowledge of complex geology at outcrop- to basin-scale. Specifically, my contributions to the field focus on: (1) Furthering our understanding of the formation of crust during the Hadean and Archean, (2) evaluating processes of early life recorded in the rock record and studying the influence of impact-related environmental perturbations on the biosphere, and (3) characterizing the poorly understood tectonic processes in the Archean.
Post-Doctoral Fellow Perez-Mercader Lab, Rowland Institute
Thomas Draper completed both his BSc and MSc in Chemistry at the University of Bristol, UK, focusing on catalysis and air-sensitive inorganic synthesis, with Professor Robin Bedford. He earned his PhD jointly under Dr John Turner and Dr Qiao Chen, at the University of Sussex, UK in 2016. His PhD, situated at the inorganic/physical border, involved air-sensitive organometallic synthesis, small molecule activation, heterogeneous photocatalysis, and nanotechnology. Afterwards he worked as a Post-doctoral Research Associate under Professor Andrew Adamatzky at UWE Bristol, UK for 2.5 years, studying the creation, optimisation, and use in unconventional computing, of liquid marbles. He joined Dr Juan Pérez-Mercader’s group as a Post-doctoral Fellow in November 2019 on the “Top-down Synthesis of an Ex-novo Chemical Artificial Living System” project.
Felix is a microbial biogeochemist studying the lipid "fingerprints" of archaea and bacteria ‒ microorganisms that control the cycling of elements such as carbon and nitrogen on our planet. His research focuses on reconciling microbiological lab experiments with geochemical observations from the modern ocean to improve the application of microbial lipids for the reconstruction of past environments.He received a B. Sc. (2009), M. Sc. (2012), and PhD (2015) from the University of Bremen, Germany. Felix joined Prof. Ann Pearson’s lab in January 2016, where he investigates the use of stable isotopes of archaeal lipids as tracers for changes in the oceanic carbon cycle in the past and modern ocean.
I am a seismologist interested in ambient seismic sources and the way they illuminate the subsurface to provide us nearly continuous information about Earth structure. I am utilizing ambient noise to study the site response of sedimentary basins, which is an important hazard factor during earthquakes. It may also reveal how sedimentary basins, which underlie many towns and cities, respond to environmental changes.
I’m interested in connections between the geologic and biospheric carbon cycles. Specifically, my work aims to understand how processes occurring in river basins transfer carbon between these two cycles in order to regulate atmospheric CO2 concentrations over geologic timescales. To do so, I combine a suite of isotope geochemistry techniques (including compound-specific isotope measurements and novel reaction monitoring methods) with inverse models, satellite products, and geospatial analysis. My current projects include analysis of multi-year time-series samples from the Ganges-Brahmaputra and Congo Rivers, high-frequency samples from mountainous rivers in Taiwan, isotope analysis of bacteriohopanepolyols in continental shelf sediments, and development of the Ramped PyrOx radiocarbon instrument. I'm additionally working on reconstructing the mechanisms that control Cenozoic CO2 variability using inverse modeling methods.
I work jointly between Harvard and the Lamont-Doherty Earth Observatory at Columbia University in the field of observational geodynamics. My research encompasses problems related to the structure, deformation, and flow of Earth's mantle. Geological processes include mantle convection, glacial isostatic adjustment, and lithospheric deformation, and I use tools including seismology, landscape evolution, geochemistry, sediment stratigraphy, and the elevation of sea-level markers. Recently, my work has been focusing on building models of 3D Earth structure for sea-level modelling and investigating the genesis of sediment-hosted metal deposits in sedimentary basins surrounding thick lithosphere. For more info, please check out my personal website.
Yuandu Hu studied in Huazhong University of Science and Technology in Wuhan China and earned his PhD in June 2013, majoring in Polymer Chemistry and Physics. He focused mainly on the fabrication of functional soft materials (e.g. shape controllable microgels and stimulus-responsive photonic crystal microparticles) by combining microfluidic techniques and self-assembly of colloidal particles together. Prior to joining the Perez-Mercader group in September 2014, he spent one year in the University of Notre Dame in Indiana as a postdoctoral research associate. His work at Notre Dame dealt mainly with the fabrication of Janus microgel particles and self-propelling materials to mimic mircoorganisms' motion behavior.
My research focuses on advancing our understanding of Earth structure through seismic imaging using both ambient noise and earthquake data. With high-accuracy tomography models at both continental and local scales, my research is motivated by questions about tectonic processes at various tectonic settings, including sedimentary basins, fault zones, magmatic systems, and orogens. My other research interest includes using seismic interferometry to monitor subtle changes in basin aquifers and volcanos on societally relevant time scales.
Ding Ma received his Ph.D. in Earth and Planetary Sciences from Harvard University. Advised by Prof.ZhimingKuang, his dissertation research investigated three dominant patterns of large-scale atmospheric variability, namely the South Asian monsoon, Madden-Julian Oscillation and the annular mode.Beforemoving back to Harvard, he was an Earth Institute Fellow at Columbia University, where he was working with Prof. Adam Sobel to explore extreme weather associated with large-scale variability. His work emphasizes a combination of observational analysis andnumerical modeling. Guided by observations, numerical experiments are designed and conducted to pursue a better theoretical understanding of the large-scale atmospheric variability in the past, present and future. The main goal of his work is to identify essentialphysical mechanisms governing the large-scale circulation variability.... Read more about Ding Ma
Before joining the Knoll Group, Drew received a B.S. in Biological Sciences from Cornell University and a Ph.D. in Geosciences from Virginia Tech. As a paleontologist and geobiologist, his work focuses on fossils of complex eukaryotes in the late Neoproterozoic-early Paleozoic interval (~1000-450 Ma) of the geologic record. By studying the paleobiology and paleoenvironments of these fossils, his work aims to understand the rise of animal life and its impact on the Earth system.
My research interests include earthquake source mechanisms, energy budget of earthquakes and ground motion caused by dynamic earthquake ruptures. Seismological observations bring a lot of information on the earthquake source and the structure of the Earth by comparing them to theoretical models, derived from solid mechanics. However, sometimes there are still discrepancies between the observations and theoretical models (e.g. high-frequency radiation in near-field), implying additional factors which conflict with the assumptions made in the models. My goal is to identify and quantify the factors using the state-of-the-art techniques (e.g. continuous observation of seismic wave velocity structure, physics-based dynamic earthquake rupture modeling), which enable us to better understand the source mechanisms, the overall energy budget and the consequent ground motion.