蜜桃传媒破解版下载

Organic and stable isotope biogeochemistry, geobiology, biomarker research, paleoceanography, paleoclimate, extreme climates, mass extinction events

I joined CU in August 2014 as an Assistant Professor in Geological Sciences and Fellow at INSTAAR. I came to CU after having worked as a postdoctoral associate and research scientist in the Geobiology and Astrobiology Group of Prof. Roger Summons in the Department of Earth, Atmospheric and Planetary Sciences at MIT. Originally from Chile, I began my career as a marine biologist (BSc) and chemical oceanographer (MSc) at the University of Concepci贸n, Chile under the supervision of Prof. Silvio Pantoja (Marine Organic Geochemistry Group), where the field of organic biogeochemistry fascinated me. After feeling the desire to explore the world and expand my expertise, I moved to Germany and obtained a PhD in Marine Geosciences from the University of Bremen under the supervision of Prof. Kai-Uwe Hinrichs (Organic Geochemistry Group).

Research

My research group studies the interplay between microorganisms, biogeochemical processes, and climate in contemporary settings (e.g., continental margins, marine oxygen minimum zones, extreme environments), and paleo-ecosystems across major climatic/biotic transitions in Earth history (e.g., mass extinction events, greenhouse climates, glacial-interglacial transitions). We approach these systems with a focus on the structures, distributions, and stable isotope composition of cell membrane lipids (biomarkers) that can be identified in water bodies, sediments, soils, and their fossilized remains preserved in the rock record.听

Education

• PhD: Marine Geosciences, University of Bremen, Germany, 2008
• MSc: Oceanography, University of Concepci贸n, Chile, 2005
• BSc: Marine Biology and Oceanography, University of Concepci贸n, Chile, 2001

Awards

• School of Science Infinitive Kilometer Award, MIT, USA, 2012
• MARUM Research Prize 鈥� Best PhD thesis in Marine Geosciences, University of Bremen, Germany, 2010
• Best undergraduate thesis in Marine Biology, University of Concepci贸n, Chile, 2000
• Best student presentation in Biological Oceanography, Chilean Society of Marine Sciences, 1999

Teaching

Current students and postdocs

• , Graduate Student
• , PhD Student
• , Postdoctoral Scholar
• , PhD Student
• , Postdoctoral Scholar
• , Postdoctoral Scholar

Join us

Interested in joining the Organic Geochemistry Lab as a student or postdoc? Contact Prof. Julio Sep煤lveda directly for current opportunities.

Courses

• GEOL 4700/5700-008: Organic Geochemistry
  • This course explores the 鈥渂iomarker concept鈥� as a tool to elucidate biogeochemical and climatic processes in natural systems through four fundamental questions: How can we characterize and classify organic molecules in complex, natural mixtures? What processes control the synthesis, preservation and destruction of organic matter in nature? How can we use lipid biomarkers to study biogeochemical processes in modern and ancient systems? How can biomarkers inform us about Earth鈥檚 past climate and biota.
• GEOL 5700-030: Geological Topics Seminar: Lipid Biomarkers in the Geosciences
  • Recent analytical advances in organic and stable isotope geochemistry have revolutionized the Earth Sciences by providing an ever-growing number of tools to study the complex interplay between biology, biogeochemistry, geology and climate at different time scales. This course for graduate students explores hot topics in lipid biomarker and compound-specific stable isotope research. Compared to the regular Organic Geochemistry class (GEOL 4700-003/5700-0044), this course will be conducted in seminar format with interspersed small background lectures, and with a stronger focus on specific applications in the Earth Sciences. We will read and discuss seminal and recent research papers that are expanding our understanding of how our planet works, and how it has changed since the emergence of life.
• GEOL 3040: Global Change: The recent geological record
  • This course for undergraduate students explores the science of global change with a focus on how the geological record can inform the study of future climate change. We discuss the basics of the global climate system, how the climate of our planet has changed over geological time scales due to natural processes, and how it has changed and will continue to change due to human impact. Students will learn: (a) How the climate system works; (b) What factors cause climate to change across different time scales; (c) How scientists use different archives (records) and tools (proxy or proxies) to study climate change in the past (paleo-climate); (d) How scientists use observations, models, and theory to make predictions about future climate change and its consequences for our planet.