3. People

Current Group Members

Photo courtesy of Jason Grow

Photo courtesy of Jason Grow

Dan Cziczo
Associate Professor of Atmospheric Chemistry

Dan joined the Department of Earth, Atmospheric and Planetary Sciences as Professor of Atmospheric Chemistry in 2011. His research focuses on the role that particulate matter plays in atmospheric chemistry, visibility, and cloud formation. Examples include understanding how aerosols nucleate water and ice clouds, improving the quantification of meteoritic ablation products, and determining the abundance of aircraft and rocket exhaust. Dan’s undergraduate work was in Aerospace Engineering (BS, 1992) and he spent two years at the Jet Propulsion Laboratory performing spacecraft navigation before starting his graduate work. Dan received an MS (1997) and PhD (1999) in Geophysical Sciences from the University of Chicago for work with Professor Jon Abbatt (now at the University of Toronto). His post doctoral fellowship was with Dr. Daniel Murphy at the NOAA Aeronomy Laboratory (now the Earth Systems Research Laboratory) and he spent three years at the Swiss Federal Institute of Technology (ETH) working with Professor Ulrike Lohmann. Before coming to MIT Dan was a Research Scientist at the Pacific Northwest National Laboratory where he directed their Atmospheric Measurement Laboratory.


Alexandria Johnson
Post-doctoral Fellow
Alexandria joined the Cziczo group at MIT in the spring of 2014. She received a Bachelor’s degree in Physics (2009) from Michigan Technological University and a Ph.D. in Atmospheric Science (2014) from the Department of Earth, Atmospheric, and Planetary Sciences at Purdue University. Past research topics include laboratory studies on the freezing properties of ice under Earth and Martian atmospheric conditions, airborne studies of water vapor with a GPS radio occultation system during PREDICT and in situ cloud microphysical properties during ICE-T, and high-resolution, single cloud numerical modeling. In the Cziczo group, and in collaboration the Seager group at MIT, Alexandria will investigate the formation and properties of cloud particles representative of those that may form in exoplanet atmospheres in the laboratory setting.
Michael Roesch
Post-doctoral Fellow

Michael joined the Cziczo group in the spring of 2015. Michael holds a Diploma (equivalent to M.Sc.) in Meteorology in April 2010 at the University of Leipzig and a Ph.D. in Meteorology in March 2015 at the University of Leipzig. His research interests include laboratory studies on particle separation in the sub- and supermicron range using PCVI technique, cyclone impactor and DMA technique. Also investigated different particle generation methods with the focus on supermicron particles to investigate their immersion freezing behaviour.

Carolin Roesch
Post-doctoral Fellow

Carolin joined the Cziczo Group in November 2015. She studied Meteorology at the Leipzig University, Germany, where she received her Diploma (equivalent to MSc) in 2010 and her Ph.D. in 2015. She was granted a Ph.D. fellowship of the German Federal Environmental Foundation (DBU) for her thesis about particle formation in realistic indoor environments. The research was done in cooperation with the Helmholtz Center for Environmental Research (UFZ) Leipzig, Germany and included different methods for pattern recognition in large data sets in addition to the experimental work. In a joint research project of the MIT Departments EAPS and CEE as well as the Center for Complex Engineering Systems at KACST, Riyadh, Carolin will investigate the influence of dust particles on the energy efficiency of solar cells.

Maria Zawadowicz
Graduate Student
Maria joined the group in the fall of 2012, after receiving her B.A. in Chemistry and Physics from Lake Forest College. Currently, she is pursuing a Ph.D in Atmospheric Science at the Department of Earth, Atmospheric and Planetary Sciences. She is interested in design and construction of analytical instruments that characterize of the atmosphere both in laboratory and field studies. Her favorite techniques are optical spectroscopy in infrared, visible and UV regions, as well as mass spectrometry. In the group, she currently works on designing a flow tube experiment to study deliquescence and efflorescence of aerosol particles by FTIR spectroscopy.
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Martin Wolf
Graduate Student

Martin joined the group in the fall of 2015. He graduated as a Chemical and Biological Engineer from Princeton University in June, 2015. His senior research focused on quantifying the effects of ocean acidification on planktonic foraminifera as well as quantifying the rates of epipelagic nitrification in the North Atlantic Ocean. He is currently working on projects with the lab’s Cloud Condensation Nuclei Counter (CCNC) and Spectrometer for Ice Nuclei (SPIN), and he hopes to illuminate the ways in which different aerosol particles interact with water vapor to form clouds.

Tajana Erjavec
Graduate Student

Tajana joined the group in the fall of 2016, after graduating from the Ohio State University with a B.S. in physics. Her undergraduate research focused on developing a data fusion model for better Martian mineral classification using the Mars 2020 rover instrument, SuperCam. She will be investigating the formation and properties of CO2 and water ice clouds in the context of the Martian atmosphere. In the long term, she hopes to investigate the properties of clouds in more exotic exoplanetary atmospheres and their effects on habitability. 

Libby Koolik
Masters Student
Libby is originally from South Florida, where she graduated from Spanish River Community High School.  She will graduate in the MIT Class of 2017 and is now pursuing  a 5th Year Masters through Civil and Environmental Engineering. She is interested in better understanding the factors that influence contact freezing in the atmosphere to gain a better understanding of the chemical and physical interactions between the atmosphere and aerosols.  She eventually wants to work on urban air quality or climate change management and policy.
Costa Christopoulos
UROP Student
Costa is a member of the 2013 graduating class of Hewitt-Trussville High School and a native of Trussville, Alabama. He is now attending MIT in pursuit of a BS in Physics and Earth, Atmospheric, and Planetary Sciences. Costa utilizes electron microscopy to study the chemistry and morphology of cloud condensation nuclei. Human activities such as fossil fuel combustion increase the concentration of particulate matter in the atmosphere. Ultimately, he want to help elucidate the relationship between anthropogenic aerosols, cloud formation, and Earth’s radiation budget.
Group Alumni
Sarvesh Garemilla
Chief Scientist, ACME AtronOmatic
Sarvesh received his Ph.D. in Climate Science from MIT in July, 2016. Since that time Sarvesh has served as Chief Scientist at ACME AtronOmatic, LLC in Portland, OR.


Sara Lance
Professor, SUNY-Albany
Sara, a Research Scientist in the Cziczo group, is now on the Faculty at the State University of New York’s Albany campus. She runs a research group performing atmospheric chemistry measurements.
Karin Ardon Dryer
Karin Ardon Dryer
Post-doctoral Fellow, Harvard
Karin was a post-doctoral fellow in the Cziczo group. Her research work included studies of coagulation and contact freezing of different types of ice nuclei using our new contact chamber.
Simon Proud
Research Scientist, University of Coppenhagen
Simon was a Visiting Scientist in the Cziczo group from fall 2013 – 2014. Simon conducted modeling studies of aerosol / cloud interactions and participated in laboratory work on water uptake and freezing while in the group. His home page can be found here.
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Dr. Yi-wen Huang
Senior Scientist, Los Gatos Research
Yi-wen was a post-doctoral fellow in the Cziczo Group studying ice nucleation using mass spectrometry. She is now a senior scientist at Los Gatos Research in Mountain View, CA.
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Dr. Beth Friedman
Post-doctoral fellow, Colorado State University
Beth received her Ph.D. from the University of Washington working jointly with Prof. Joel Thornton Dan Cziczo. Beth holds an undergraduate degree in Chemistry from Carleton College in Northfield, MN. Her graduate work included studies of droplet and ice nucleation both in the laboratory and field.
Shaena Berlin
Research Scientist, Environ
Shaena received her M.S. in EAPS as a member of the Cziczo Group in the spring of 2014. As a senior undergraduate in EAPS Shaena undertook research on Martian cloud formation conditions and continued by pursuing a 5th-year Master of Science in EAPS . Shaena used an electrodynamic balance (EDB) to perform the ice nucleation studies. Shaena is now and environmental consultant at Environ in San Francisco, CA.

Fabian Mahrt

Ph.D student, ETH

Fabian was a visiting student in the Cziczo group during the 2014-15 academic year. During this time he worked on projects involving inertial separation of droplets and ice crystals as well as advanced analysis of mass spectrometer data. Fabian is now finishing his Ph.D. in Ulrike Lohmann’s group at ETH – Zurich.

Dr. Hanna Herich
Research Scientist, EMPA
Hanna was a joint Ph.D. student with Ulrike Lohmann and Dan Cziczo at the Swiss Federal Institute of Technology. Hanna is currently a post-doctoral fellow with EMPA (the Swiss Federal Laboratories for Material Science and Technology) in Dubendorf, Switzerland where she is studying aerosol properties.
Dr. Gourihar Kulkarni
Research Scientist, PNNL
GK was a post-doctoral fellow with Dan Cziczo during his tenure as a senior scientist at the Department of Energy’s Pacific Northwest National Laboratory. GK is currently a research scientist at PNNL where he conducts ice nucleation experiments with a focus on parameterizing the results for inclusion in cloud resolving and global climate models.
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Dr. Stephane Gallavardin
Research Scientist, MPI
Stephane was a post-doctoral fellow with Dan Cziczo during his time at ETH (July 2005- June 2008). Stephane used mass spectrometry to determine the chemical composition of aerosol single particles. His research emphasized mineral dust and their potential to form ice. Stephane is currently a post-doctoral fellow at the Max-Plank Institute for Chemistry in Mainz, Germany where he is developing advanced ion trap based mass spectrometers for aerosol composition.

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