Jess F. Adkins

Smits Family Professor of Geochemistry and Global Environmental Science

Professor Adkins focuses on geochemical investigations of past climates using corals, sediments and their interstitial waters; Rate of deep ocean circulation and its relation to mechanisms of rapid climate changes; Metals as tracers of environmental processes; Radiocarbon and U-series chronology. Chemical oceanography.

Geoffrey A. (Geoff) Blake

Professor of Cosmochemistry and Planetary Sciences and Professor of Chemistry

Geoffrey Blake applies innovative spectroscopic tools to investigate the chemical and physical processes that operate in natural environments.

Simona Bordoni

Professor of Environmental Science and Engineering

Professor Bordoni is interested in the dynamics of important atmospheric processes that influence weather and climate. Her work specifically focuses on the dynamics of monsoon systems, and aims at understanding fundamental dynamical mechanisms which are implicated in their existence, their location and different geographical features, and which might help understand how monsoons change with changing climates.

John M. Eiler

Professor Eiler's focuses on isotope geochemistry of light elements (H, C, N, O and S), as applied to: the origin and evolution of igneous rocks; the origin and evolution of meteorites; planetary atmospheres; atmospheric and environmental chemistry; paleoclimate; and paleontology.

Richard C. Flagan

Irma and Ross McCollum-William H. Corcoran Professor of Chemical Engineering and Environmental Science and Engineering

Professor Flagan focuses on aerosols, and includes studies of secondary organic aerosols in the atmosphere, of biological particles such as pollen and their health impacts, and of the formation of particles and clouds in the atmosphere of Titan. At the center of his work is the development of methods for the physical, chemical, and biochemical characterization of aerosol particles ranging from particles as small a 1 nm diameter to pollen grains that can exceed 100 µm in size. He also applies methods derived from aerosol science to the study of phase transitions in materials, and the development of separations technologies.

Christian Frankenberg

Associate Professor of Environmental Science and Engineering; Jet Propulsion Laboratory Research Scientist

Professor Frankenberg's research interests include remote sensing of atmospheric trace gases, biogeochemical cycles, hydrological cycle and distribution of water isotopes, inverse methods, and applied spectroscopy.

Michael R. Hoffmann

Theodore Y. Wu Professor of Environmental Science

Hoffmann's group studies many facets of environmental science including: environmental chemistry, cloud and aerosol chemistry, chemical kinetics, semiconductor photocatalysis, sonochemistry, electrochemistry, radiation chemistry, advanced oxidation technologies, chemical catalysis applied to pollution control, photochemistry, chemical reaction mechanisms relevant to environmental systems.

Andrew P. Ingersoll

Professor of Planetary Science

Professor Ingersoll focuses on dynamic meteorology and climatology; spacecraft studies of the Earth and other planets; chaotic dust storms and polar caps of Mars; moist convection and the long lived atmospheric vortices of Jupiter; oceanography; the unity of atmospheric circulations throughout the solar system.

Michael P. Lamb

Professor of Geology

Professor Lamb's research focuses on the sedimentary and geomorphic processes that shape the surfaces of Earth, Mars and Titan. Current topics include waterfall erosion, sediment transport in steep mountain streams, river terrace formation, river mouth dynamics, and hyperpycnal flows.

Jared R. Leadbetter

Professor of Environmental Microbiology

Leadbetter’s research program at Caltech focuses on interspecies microbial interactions and has two distinct thrusts. One is lignocellulose conversion by the complex microbial communities present in the guts of termites. The other is the biodegradation of (and related research on) an important class of bacterial signaling molecules, acyl-homoserine lactones.

Dianne K. Newman

Gordon M. Binder/Amgen Professor of Biology and Geobiology; Executive Officer for Molecular Biology

Professor Newman focuses on Electron Transfer and Biofilm Physiology, Photosynthesis and Respiration Based on Iron and/or Arsenic, and Intra- and Extracellular Biomineralization.

Mitchio Okumura

Professor of Chemical Physics

The research activities of Professor Okumura are in the areas of laser spectroscopy, kinetics, and reaction dynamics, applied to problems in atmospheric chemistry. He studies atmospheric free radicals and transient intermediates in order to understand the reactions and photochemistry that are most important in the troposphere and stratosphere. His goal is both to determine parameters of key reactions and species in the atmosphere, and to understand the chemical physics of these processes at the most fundamental level.

Victoria J. Orphan

James Irvine Professor of Environmental Science and Geobiology

Professor Orphan focuses on molecular microbial ecology of anaerobic communities involved in carbon and sulfur cycling; application and development of combined molecular and isotopic methods for relating uncultured microorganisms to biogeochemical processes and understanding interspecies interactions. 

Tapio Schneider

Frank J. Gilloon Professor of Environmental Science and Engineering; Jet Propulsion Laboratory Senior Research Scientist

Professor Schneider's research focuses on the climate dynamics of Earth and other planets. Its goal is to develop theories of climate and in particular of the atmospheric macroturbulence that largely controls it. Such theories help us understand the climate changes that occurred over Earth's history and that are likely to occur in the future. They also help us understand the circulations of other planets, for example, how jets on the giant planets form.

John H. Seinfeld

Louis E. Nohl Professor of Chemical Engineering

John Seinfeld focuses on atmospheric chemistry and physics; aerosols; and climate.

Alex L. Sessions

Professor of Geobiology

Professor Sessions focuses on hydrogen and carbon isotopic studies of organic geochemistry and microbial biogeochemistry, with an emphasis on natural microbial processes regulating the production and preservation of marine and sedimentary organic matter. Also the development of new stable-isotopic methods for investigating complex organic materials and microbial ecosystems.

Andrew F. Thompson

Professor of Environmental Science and Engineering

Professor Thompson's research, which uses a combination of sea-going observations, idealized numerical models and theory, focuses on ocean circulation and the physical processes that transport heat, chemicals and biology within the ocean. His work specifically explores the dynamics of ocean turbulence; the role of eddies in ocean mixing and Southern Ocean circulation, with a goal of understanding how these processes govern the ocean's contribution and response to changes in Earth's climate.

Paul O. Wennberg

R. Stanton Avery Professor of Atmospheric Chemistry and Environmental Science and Engineering; Executive Officer for Environmental Science and Engineering; Director, Ronald and Maxine Linde Center for Global Environmental Science

Paul Wennberg studies the composition of the atmosphere of Earth and other planets.  He is trained as a physical chemist and most of his investigations begin with atmospheric observations made by his research group in the laboratory or in the field. A hierarchy of models are used to study these observations. His group studies the carbon cycle, photochemistry, and air quality.

Yuk L. Yung

Professor of Planetary Science; Jet Propulsion Laboratory Senior Research Scientist

Professor Yung focuses on upper atmosphere photochemistry, radiative transfer through atmosphere, and stratospheric ozone depletion.


Norman H. Brooks

James Irvine Professor of Environmental and Civil Engineering, Emeritus

E. J. (John) List

Professor of Environmental Engineering Science, Emeritus

James J. (Jim) Morgan

Marvin L. Goldberger Professor of Environmental Engineering Science, Emeritus