
Environmental science of climate, carbon, and energy
Ken Caldeira
Department of Global Ecology
Carnegie Institution for Science
260 Panama St.
Stanford, CA 94305, USA
1 + (650) 704-7212
kcaldeira@carnegiescience.edu
Carnegie Energy Innovation Research Brief
Lab Tabs
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Enrico Antonini (Postdoctoral Fellow)
Enrico is a Postdoctoral Research Scientist for the Carnegie Institution for Science, Department of Global Ecology at Stanford University. His research aims to understand the physics of wind power extraction for regional-scale wind farms. Enrico is investigating the efficiency of large wind farms and which physical parameters control their power extraction.
Before joining the Carnegie Institution for Science, Enrico conducted research in wind energy, computational fluid dynamics and optimization algorithms with the goal of advancing the knowledge of wind turbine aerodynamics and creating new design frameworks for the wind turbine industry.
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Sara Ashfaq (Postdoctoral Fellow)
Sara is a Postdoctoral Research Scientist at the Carnegie Institution for Science at Stanford University. Her research focuses on the Sustainable Development, energy-environment-economic (E3) modeling, Renewable Energy Management and Electricity Market. She is broadly interested in the Idealized energy system modeling for net-zero emission energy-systems.
Before joining the Global Ecology Center (GEC) at Stanford University, Sara was a Research Assistant at The Australian Research Council (ARC), Hub for Integrated Energy Solutions, Sydney, where she researched microgrid control and management, to provide solutions to a more sustainable, secure, reliable and economically efficient energy supply for Australia.
Sara holds an interdisciplinary Ph.D. degree in Electrical Power and Energy Systems Engineering from University of New South, Wales (UNSW), Sydney, Australia. She is the recipient of the Australian Government Research Training Program (RTP) Scholarship.
Outside of work, Sara participates in volunteer work for natural crisis, environmental conservation, bushfire and community services.
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Michael Dioha (Postdoctoral Fellow)
Michael Dioha is a Postdoctoral Fellow in the Carnegie Institution for Science Department of Global Ecology at Stanford University. His research interests revolve around energy-environment-economic (E3) modeling, the quantification of energy/climate scenarios, and interdisciplinary issues in energy and environmental justice, especially in the Global South.
Michael plays advisory and analysis roles for international organizations, including the International Renewable Energy Agency. He also sits on multiple advisory boards, including the Sustainability Expert Advisory Forum of the Global Network for Sustainable Development.
Before joining the Carnegie Institution for Science, Michael was a Research Analyst at the TERI School of Advanced Studies, New Delhi, where he researched net-zero emission pathways for India. Beyond academic research, Michael also advocates for innovative approaches that promote just and equitable socio-technical transitions in Africa.
Michael holds an interdisciplinary Ph.D. degree in Energy & Environment and a B.Sc. degree in Mechanical Engineering. Outside of work, Michael enjoys playing soccer and cycling.
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Lei Duan's research topic is about modeling the climate response to external forcing, especially the global scale geoengineering schemes during his PhD. At Carnegie, he will continue working on climate simulations and also helping with the energy modeling work in Ken Caldeira's group. He had a wonderful experience when he was here previously, and feels happy to come back and work with everyone in Carnegie.
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Manoela Romano de Orte (Postdoctoral Fellow)
Manoela Romanó de Orte is a Postdoctoral Research Scientist in in the Caldeira Lab at the Carnegie Institution for Science's Department of Global Ecology. She is a marine scientist, studying the fate and the effects of pollutants in the coastal environment. Her research considers traditional pollutants, such as heavy metals, alongside emerging contaminant threats. These emerging threats include plastics and the global effects of humans dumping carbon dioxide emissions into the atmosphere, which warms and acidifies the ocean. Manoela's latest work focuses on the response of coral reef ecosystems to climate change and to plastic pollution.
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Tyler Ruggles (Research Associate)
I am a scientist studying low carbon energy transitions. How do we create a low carbon energy system? What could that system look like? What technological breakthroughs are necessary? These are some of the questions which motivate my research.
My current work focuses on studying the interannual variability of renewable energy resources and potential consequences for a highly-renewable grid. I also model the conversion of electric power to liquid fuels or hydrogen to study the benefits these technologies can bring to the grid including increased flexibility.
Before starting on energy systems research, I completed a PhD in particle physics while based at CERN working for the University of Wisconsin-Madison.
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Leslie Willoughby (Science Writer)
Leslie's first love was a horned toad that lived in her backyard in Albuquerque. It disappeared over winter, emerged in spring, and showed her that nature changes over time. Throughout childhood, she yearned to share that lizard's world with others.
In college she studied environmental interpretation. Afterward, at the newly created Ohio EPA, she funded programs that regulated scrubbers in coal-fired power plants and improved sewage treatment facilities. Later, as a science teacher, she set the lab tables with a new narrative each morning. Monday’s tale might compare skeletons; Tuesday’s could mimic a lunar eclipse.
When climate change became the biggest nature story, Leslie signed on as a reporter in the Eastern Sierra. While forest fires rage and drought starves California's snowpack and water supply, Leslie heeds the call for epic writing muscle. She works out every day.

