Maps of GEOS-Chem User Groups

Click on a pin to see the name of the institution and follow the link to find out how it uses GEOS-Chem! Use the zoom button on the map to resolve individual pins. See below for a complete list of GEOS-Chem User Groups.

Legend: | Support Team | Steering Committee | Users


Listing of GEOS-Chem User Groups

Harvard University
Cambridge, Massachusetts, USA

Harvard Atmospheric Chemistry Modeling Group

We apply GEOS-Chem and its adjoint to simulations of tropospheric chemistry, air quality, methane, mercury, and chemistry-climate interactions. We collaborate with NASA GMAO in the use of GEOS-Chem as a chemical module for data assimilation within the GEOS Earth System Model (ESM), including development of new numerical algorithms, and work on the development of the High-Performance GEOS-Chem (GCHP). We also drive GEOS-Chem with GISS-GCM meteorology for simulation of future and paleo climates. See our current research activities for details. We also support GEOS-Chem for the general benefit of its user community.

Group Website:

Group Leaders:

Group Members: Please see this listing

GEOS-Chem Support Team Members:


University of Alaska
Fairbanks, Alaska, USA

Mao Group

We plan to use GEOS-Chem to study the impact of biogenic and biomass burning emissions on atmospheric composition, particularly over polar regions

Group Website:

Leader: Jingqiu Mao


Alfred Wegener Institute for Polar and Marine Research (AWI)
Potsdam, Germany

Mao Group

We apply a Lagrangian chemistry and transport model to simulate the transport of sulfur from the troposphere to the stratosphere. GEOS-Chem is used to provide three-dimensional fields of the concentrations of ozone, OH, and H2O2, which are needed for the simulation of the chemical conversion of DMS (dimethylsulfide) and SO2 in the troposphere.

Group Website:

Leader: Markus Rex (Professor)

Group Members:

  • Ralph Lehmann (Senior Scientist)
  • Ingo Wohltmann (Senior Scientist)


Argonne National Laboratory
Illinois, USA

Streets Group

We will use GEOS-Chem to validate and constraint emission inventories, and apply GEOS-Chem to understand the emission and transport of air pollutants over China. We are working in collaboration with Yuxuan Wang at Tsinghua University.

Group Website:

Leader: David G. Streets (Senior Scientist, ANL)

Liao Group

We are planning to use GEOS-Chem to develop chemical data assimilation using satellite, air and ground measurement data based on a global scale.

Group Website:

Group Leader: K. J. Liao (Environmental Science Division, ANL)


Atmospheric and Environmental Research (AER)
Lexington, Massachusetts, USA

We plan to integrate the AER radiative transfer model (RRTMG) online into GEOS-Chem. We are working in collaboration with Prof. Colette Heald at MIT.

Group Website:

Group Leaders:

  • Matthew Alvarado (Staff Scientist); email: malvarad [at]
  • Karen Cady-Pereira (Staff Scientist), email: cadyp [at]


Beijing Normal University
Beijing, China

Li Group

We wil use the GEOS-Chem model to characterise the relationship between wetland emissions and CH4 columns.

Group Website:

Group Leader: Xianglan Li

Group Members: Minmin Sun; email: sunminmin199023 [at]


University of Birmingham
Edgbaston, UK

Marais Group

We combine GEOS-Chem with surface, aircraft, and satellite observations to obtain improved estimates of anthropogenic, biogenic, and biomass burning emissions, understand upper tropospheric nitrogen oxide dynamics, and the impact of policy decisions on health and food security.

Group Leader: Eloïse Marais (Birmingham Fellow)


Bodeker Scientific
Alexandra, Otago, New Zealand

The small research group at Bodeker Scientific is intending to use GEOS-Chem to investigate the sensitivity of sulfur transport from the troposphere to the stratosphere to OH concentrations. GEOS-Chem will be used to simulate ozone, OH, H2O2 and related fields that determine the sulfur abundances in the troposphere.

Group Website:

Group Leader: Stefanie Kremser (Research Scientist)

Group Members: Please see this listing


Boston University
Boston, Massachusetts, USA

Geddes Group

We use the GEOS-Chem model to help understand the links between atmospheric chemistry and the Earth's changing biosphere, and to help interpret and advance ground- and satellite-based remote sensing observations of air pollution.

Group Website:

Group Leader: Jeffrey Geddes (Assistant Professor)

Group Members: Please see our group website


University of Bremen
Bremen, Germany

Notholt Group

We are working on investigating the atmospheric relationship between OCS and CO2 using FTIR measurements and GEOS-Chem. I simulated CO2 and OCS with different fluxes, now mainly using SiB biospheic fluxes for both CO2 and OCS, and compared to our FTIR measurements. Model inversion is planned for the next step.

Group Website:

Group Leader: Justus Notholt (Professor)

Group Members: Yuting Wang (Graduate Student); email: w_yuting [at]


California Institute of Technology
Pasadena, California, USA

Seinfeld Group

The Seinfeld group focuses on improving the treatment of aerosols in GEOS-Chem. Studies include examining the effect of changes in climate and emissions on present-day and future aerosol levels.

Group Website:

Group Leader: John Seinfeld (Professor)

Group Members: Please see this listing

Wennberg Group

We have been working on isoprene photooxidation in an atmospheric chamber using a chemical ionization mass spectrometer. We would like to implement a more detailed version of isoprene photooxidation in GEOS-Chem to examine the effect on NOx transport and carboxylic acid formation.

Group Website:

Group Leader: Paul Wennberg (Professor)

Group Members: Rebecca Schwantes (Graduate Student)


University of California at Berkeley
Berkeley, California, USA

Cohen Group

We are using observations of NO2 column densities from OMI interpreted with GEOS-Chem to constrain soil NOx emissions over the United States and globally. We are also implementing new methyl-peroxynitrate chemistry to examine impacts on Arctic chemistry.

Group Website:

Group Leader: Ron Cohen (Professor)

Group Members: Please see this listing


University of California at Irvine
Irvine, California, USA

Randerson Group

We are using GEOS-Chem to study the global carbon cycle, aerosols, and the impact of fires on tropospheric composition. We are continuing to develop the Global Fire Emissions Database (GFED) and to plan to integrate higher spatial and temporal resolution time series of fire emissions into the model over the next few years.

Group Website:

Group Leader: James Randerson (Professor)

Group Members:

  • Yang Chen (Project Scientist)
  • Mingquan Mu (Project Scientist)


University of California at Los Angeles (UCLA)
Los Angeles, California, USA

Li Group

We are applying the GEOS-Chem model to interpret satellite retrievals and in-situ (aircraft) observations to understand precursor emissions, chemical processes, and transport that determine the global distributions of tropospheric ozone and aerosols.

Group Website:

Group Leader: Qinbin Li (Assistant Professor)

Group Members: Please see this listing


University of California at Merced (UC Merced)
Merced, California, USA

We are using the GEOS-Chem adjoint for data assimilation and inverse modeling of tropical fluxes of carbonyl sulfide.

Group Website:

Group Leader: Elliot Campbell

Group Members: James Stinecipher


Canadian Meteorological Center
Dorval, Quebec, Canada

Air Quality Research Division

The Air Quality Research Division of Environment and Climate Change Canada (ECCC) has launched a project to update the aerosol model in GEM-MACH, the ECCC air quality model. This includes revising parameterizations for nucleation and post-nucleation growth including the role of organics, thermodynamics, and improving the mixing state representation based on the latest research. Substantial advances have been made over the last 10 years in understanding nucleation and the role of organics but existing aerosol models represent the state of the art that dates back to the 1990s. One of the major limitations of existing aerosol models is the treatment of sub 100 nm particles which become increasingly surface active and impacted by the Kelvin curvature effect. Existing thermodynamics models and aerosol dynamics models fail to properly account for size effects. Yet sub 100 nm particles are important for health impacts and aerosol indirect effects via CCN formation.

Group Leader: Kirill Semeniuk (Research Scientist), kirill.semeniuk [at]


Carnegie-Mellon University
Pittsburgh, Pensylvania, USA

Adams Group

We are interested in the aerosol indirect effect, modeling aerosol microphysics and cloud condensation nuclei, and understanding organic aerosols in the atmosphere. Our group has led the development of the TOMAS aerosol microphysics code, which is available as an option in GEOS-Chem.

Group Website:

Group Leader: Peter Adams (Professor)

Group Members: Marguerite Marks (Graduate Student); email: margueritemarks [at]

  • My research will utilize GEOS-Chem with the TOMAS microphysics package, in conjunction with satellite and ground-level measurements, to understand sources of cloud condensation nuclei (CCN), and improve the representation of CCN in global models. 


Chinese Academy of Sciences
Beijing, China

Chen Group

We are using GEOS-Chem to analyze the sources and distributions of CO2 in Central Asia and research the factors which affect CO2 concentration distribution.

Group Website:

Group Leader: Xi Chen

Group Members:

  • Chi Zhang
  • Liangzhong Cao


The Chinese University of Hong Kong
Hong Kong, China

Tai Group for Atmosphere-Biosphere Interactions

We use GEOS-Chem to investigate the impacts of historical and future climate and land cover changes on global and East Asian air quality, including climate feedbacks. Particular focus includes factors controlling ozone and PM2.5 air quality, variability of East Asian dust, CO2-isoprene interaction, and impacts of air pollution on agriculture.

Group Website:

Group Leader: Amos P. K. Tai (Assistant Professor)

Group Members: Please see this listing


University of Colorado at Boulder
Boulder, Colorado, USA

Henze Group

We use GEOS-Chem to learn more about the sources and processes that govern distributions of criteria pollutants and greenhouse gases. We help lead development of the GEOS-Chem adjoint model and are involved in many aspects of chemical data assimilation and model sensitivity analysis.

Group Website:

Group Leader: Daven Henze (Associate Professor)

Group Members: Please see this listing

GEOS-Chem Support Team Members: Yanko Davila (Scientific Programmer, GEOS-Chem adjoint support)

Institute of Arctic and Alpine Research

We are interested in doing simulations with relatively non-reactive species, including CO2, N2O and oceanic fluxes of O2 and N2. We are also interested in performing N2O simulations with the UCX stratospheric-tropospheric chemistry mechanism.

Group Website:

Group Leader: Cynthia Nevison (Research Scientist)


Colorado State University
Fort Collins, Colorado, USA

Fischer Group

We are using GEOS-Chem to understand the global distribution of PAN and the impact of reactive nitrogen transport on global oxidation.

Group Website:

Group Leader: Emily Fischer (Assistant Professor)

Group Members: Please see this listing

Pierce Group

We are using GEOS-Chem as a tool to help understand and improve our ability to predict aerosol number, size and composition in models.

Group Website:

Group Leader: Jeffrey Pierce (Assistant Professor)

Group Members: Please see this listing


Columbia University
New York, New York, USA

McNeill Group

We are working, in collaboration with Prof. Tzung-May Fu and others, to implement aqueous pathways of SOA formation into GEOS-Chem and test their impact on organic aerosol loadings.

Group Website:

Group Leader: V. Faye McNeill (Associate Professor)

Collaborators: Arlene Fiore (LDEO / Columbia University)


University of Connecticut
Storrs, Connecticut, USA

Computational Atmospheric Chemistry and Exposure Lab

We are interested in using GEOS-Chem to establish a global model of particulate matter that can be used to better understand how different global sources influence regional particulate matter observations and the potential ramifications for both human health and aerosol-cloud interactions.

Group Website:

Group Leader: Kristina Wagstrom (Assistant Professor)

Group Members: Carmen Lamancusa (Graduate Student); email: carmen.lamancusa [at]


Copenhagen University
Copenhagen, Denmark

Department of Chemistry

We use the GEOS-Chem model in halogen simulations.

Group Leader: Johan Schmidt (Independent Researcher)


Dalhousie University
Halifax, Nova Scotia, Canada

Martin Group

We use the GEOS-Chem model to support the retrieval and interpretation of satellite observations of tropospheric composition in the context of in situ measurements.

Group Website:

Group Leader: Randall Martin (Professor)

Group Members: Please see this listing

GEOS-Chem Support Team Members: Chi Li (Graduate Student)


Dalian University of Technology
Dalian, China

Chen Group:

We are interested in using GEOS-Chem to investigate the contribution of HOMs to new particle formation and haze on a regional and global scale.

Group Website:

Group Leader: Professor Jingwen Chen (jwchen [at]

Group Members: Deming Xia (xiadm [at]; Fangfang Ma (mafangfang0411 [at]


Duke University
Durham, North Carolina, USA

Kasibhatla Group

Our goal is to combine measurements with GEOS-Chem model results to derive a better understanding of the distributions of key tropospheric species and to elucidate the factors that control these distributions. We work in collaboration with James Randerson's group at UC Irvine.

Group Website:

Group Leader: Prasad Kasibhatla (Professor and Senior Associate Dean, Environmental Sciences and Policy)

Group Members: Kemen Austin


University of East Anglia
Norwich, UK

Suntharalingam Group

We will use GEOS-Chem to investigate global atmospheric budgets and fluxes of carbon species.

Group Website:

Group Leader: Parvada Suntharalingam (Reader)


University of Edinburgh
Edinburgh, UK

Palmer Group

We are primarily interested in how we can use aircraft, ground-based and satellite observations of chemical composition and inverse methods to further our understanding of tropospheric chemistry.

Group Website:

Group Leader: Paul Palmer (Professor, School of Geosciences)

Group Members: Please see this listing


Emory University
Atlanta, Georgia, USA

Liu Group

We use GEOS-Chem simulated aerosol profiles and composition to support regional to national scale satellite-based air pollution exposure modeling and health impact assessments in the US.

Group Website:

Group Leader: Yang Liu (Associate Professor)

Group Members: Please see this listing


Environment Canada
Toronto, Ontario, Canada

Nassar Group

We are using GEOS-Chem for CO2 modeling and source sink estimation with satellite and surface data. This includes comparison of GEOS-Chem simulations with other model and assimilation systems.

Group Leader: Ray Nassar (Research Scientist)


Electric Power Research Institute (EPRI)
Palo Alto, California, USA

Levin Group

Group Website:

Group Leader: Leonard Levin


Environmental Protection Agency (EPA)
Research Triangle Park, NC, USA

Henderson Group

We use computer models such as GEOS-Chem to explore scientific and societal issues such as air quality and climate.

Group Website:

Group Leader: Barron Henderson (Assistant Professor)

Group Members: Please see this listing


Federal University of Technology
Akure, Nigeria

We are trying to assess movement of some gases over crude oil producing region in Nigeria. For this work, we would like to use the GEOS-chem model.

Group Leader: Gbode Imole Ezekiel (Assistant Lecturer)


Florida State University
Tallahassee, FL, USA

Holmes Group

We are quantifying chemistry-climate feedbacks in GEOS-Chem and other CTMs to assess modeling uncertainties and to make multi-decadal projections of methane and ozone. In addition, we are interested global mercury cycling processes.

Group Website: TBD

Group Leader:Chris Holmes (Assistant Professor)

Group Members: TBD


Georgia Institute of Technology
Atlanta, GA, USA

Wang Group

Our group is applying the GEOS-Chem model to analyze the sources and distributions of nonmethane hydrocarbons, oxygenated hydrocarbons, and halocarbons.  These trace gases are proxies for the anthropogenic and natural processes that control the chemical state of the atmosphere. Through this work we will understand better how these processes contributed to the changing trace gas composition of the troposphere in the past decade.

Group Website:

Group Leader: Yuhang Wang (Professor)

Group Members: Please see this listing


Greendelta GmbH
Berlin, Germany

We are working in Life Cycle Assessment and have been recently looking into regionalized Life Cycle Impact Assessment models and linking them with GIS.

Company Website:

Group Leader: Andreas Ciroth


University of Hertfordshire
Hatfield, Hertfordshire, UK

Farrow Group

My background is in palaeoclimate modelling where I worked on interfacing global circulation models with schemes representing the Earth's surface. At the University of Hertfordshire we hope to interface boundary conditions provided by a number of sources including GEOS-Chem with urban, regional and global scale air quality models such as CMAQ to study air quality responses to environment change.

Group Website:

Group Leader: Aidan Farrow (Research Fellow)


University of Houston
Houston, Texas, USA

We use GEOS-Chem for providing chemical boundary conditions for our regional models since the last year (e.g.,

We are running now GEOS-Chem for more than 28 years simulation to quantify the impact of stratosphere-troposphere ozone exchange, emissions changes, meteorology and background contributions to surface ozone levels in the US.

Moreover, we often make use of GEOS-Chem to conduct several sensitivities run globally to understand the relationship between some gas/particles to their emissions.

Group Website:

Group Leader: Yunsoo Choi (Assistant Professor)

Group Members: Please see this listing


Indian Institute of Science
Bengaluru, India

I work on the carbon cycle of tropical lakes, and plan to use the GEOS-Chem model to estimate surface Pb-210 fluxes over the Indian subcontinent.

Group Leader: Gurjot Singh (Research Scientist)


Indian Institute of Technology
Bombay, India

Bojjagani Group

We plan to use GEOS-Chem for our Indian scenarios.

Group Leader: Sreekanth Bojjagani (PhD Research Scholar); email: govardhanamm19 [at]


Indian Institute of Tropical Meteorology (IITM)
Pune, India

We are interested in using the GEOS-Chem chemical transport model to study the effect of aerosol chemistry, emissions, pollution on the dynamics of large scale processes e.g. Asian monsoon.

Group Leader: Dr. Sachin D. Ghude (Scientist E)

Group Leader: Sreyashi Debnath (Junior Research Fellow)


Institute of Atmospheric Sciences and Climate (ISAC)
National Research Council (CNR)
Lecce, Italy

Cloud and precipitation physics group

We are planning to use GEOS-Chem coupled with the WRF-Chem model to study the impact of natural aerosols in the Mediterranean basin.

Group Website:

Group Leader: Umberto Rizza


University of Iowa
Iowa City, Iowa

Wang Group

We are using GEOS-Chem in the following ways: (1) To study the effect of aerosol phase transition on heterogenous chemistry and the formation of ice clouds; (2) To interpret satellite observations of radiance of aerosols, with a focus on air quality applications, and (3) In conjunction with satellite observations, to study aerosol composition and distribution.

Group Website: TBD

Group Leaders:

Group Members: TBD


Japan Agency for Marine-Earth Science and Technology
Yokohama, Japan

Miyazaki Group

We will use the GEOS-Chem model with satellite observations to constrain emission sources of several precursors as well as chemical concentrations of various species based on data assimilation techniques.

Group Website:

Group Leader: Kazuyuki Miyazaki (Senior Scientist)


Japan Environmental Sanitation Center
Kawasaki City, Japan

Kikuchi Group

We plan to use GEOS-Chem to simulate the behavior and transport of atmospheric mercury in East Asia.

Group Website:

Group Leader: Tetsuro Kikuchi (Scientist); email: kikuchi-tr [at] jesc [dot] or [dot] jp


King's College London
London, UK

Kitwiroon Group

We plan on using GEOS-Chem boundary conditions to drive the CMAQ regional chemical transport model, for policy and health impact assessment over the UK.

Group Website:

Group Leader: Nutthida Kitwiroon (Senior Air Pollution Scientist)


KNMI (Royal Netherlands Meteorological Institute)
De Bilt, Netherlands

Boersma Group

We plan to use GEOS-Chem for the interpretation of satellite data; to estimate NOx/VOC emissions with satellite measurements, and to investigate tropospheric ozone changes. We are also very interested in comparing GEOS-Chem simulations to TM4/TM5 runs, also in the context of the above.

Group Website:

Group Leader: Folkert Boersma (Research Scientist)


Space Physics Lab, Kyiv National University
Kyiv, Ukraine

Aerosol Research Group

Our group is investigating aerosol properties, dynamics and distribution in the atmosphere over Ukraine. We are going to use Geos-Chem modeling for study of aerosol sources, transport in different conditions and events. We are participating in operation of two AERONET sites: Kyiv, Martova.

Group Website:

Group Contact: Myroslav Hordiichuk (Magister Student)


University of L'Aquila
L'Aquila, Italy

Atmospheric Composition Modelling group at CETEMPS

We develop a post-processing tool for a more flexible calculation of aerosol optical properties from chemistry-transport model output (FlexAOD). We are applying it with GEOS-Chem in the frame of AeroCom intercomparison exercises. Moreover, we are using the GEOS-Chem model to study the direct and first indirect aerosol effects at the global scale.

Group Website:

Group Leader: Gabriele Curci (Assistant Professor)

Group Members: Paolo Tuccella (Research Fellow)


Laboratory of Glaciology and Geophysical Environment (LGGE)
Grenoble, France

Dommergue Group

We use GEOS-Chem for the interpretation of Southern Hemisphere monitoring data (Amsterdam Island and Antarctica).

Group Website:

Group Leader: Aurelien Dommergue (Associate Professor)

Group Members: Helene Angot (Graduate Student)


Lamont-Doherty Earth Observatory
Palisades, New York, USA

Fiore Group

We are applying GEOS-Chem to advance our understanding of factors controlling atmospheric oxidation, including through multi-decadal simulations.

Group Website:

Group Leader: Arlene Fiore (Professor, Columbia University)

Group Members: Please see this listing

Collaborators: V. Faye McNeill (Associate Professor, Columbia University)


University of Liège
Liège, Belgium

Mahieu Group

Our main research focus will be to perform comparisons between GEOS-Chem simulations, time series of Jungfraujoch FTIR ground-based partial/total columns and space-based observations (e.g. from ACE-FTS); to help in data interpretation of long-term changes, of interannual and seasonal variability, to identify source regions. Likely targets are methanol, methyl chloride, methane, ethane, acetylene, hydrogen cyanide, carbonyl sulfide, isotopologues of carbon monoxide, methane. This is of course subject to evolve with time.

Group Website:

Group Leader: Emmanuel Mahieu (Senior Scientist, Institute of Astrophysics and Geophysics)

Group Members: Please see this listing


Louisiana State University
Baton Rouge, Louisiana, USA

Zhang Group

Our research focuses on urban air pollutants characterization, simulation and source apportionment of air pollutants and interactions between aerosols and climate. We have developed different source-oriented models to study regional problems. But with the shift of major emissions from American to Asia, we want to look at the air pollution levels in Asian and the effects to global and US air quality and climate through global model.  We plan to add source-oriented representation of aerosols to Geos-Chem and hope to take advantage of this powerful global model.

Group Website:

Group Leader: Hongliang Zhang

Group Members: Please see this listing


Lund University
Lund, Sweden

Group Website:

Group Leader: Stina Ausmeel


Massachusetts Institute of Technology
Cambridge, Massachusetts, USA

Barrett Group

We are using GEOS-Chem to assess the air quality impacts of aviation, especially the impact of aircraft cruise emissions on surface air quality.

Group Website:

Group Leader: Stephen Barrett (Assistant Professor)

Group Members: Please see this listing

Heald Group

We use the GEOS-Chem model to interpret satellite, aircraft and in situ observations of tropospheric composition with a particular focus on (1) understanding the lifecycle of tropospheric aerosol and (2) investigating biosphere-atmosphere interactions.

Group Website:

Group Leader: Colette Heald (Associate Professor)

Group Members: Please see this listing

Selin Group

We use GEOS-Chem to investigate air pollution issues relevant to decision-making. Current areas of focus include present and future ozone and particulate matter, health impacts of air pollution, and mercury and persistent organic pollutant fate and transport.

Group Website:

Group Leader: Noelle Selin (Associate Professor)

Group Members: Please see this listing

Senseable City Lab

We have installed low cost (Alphasense OPC-N2) particle counters in schools in Nairobi. When comparing the data from the low cost monitors with satellite derived aerosol optical depth (AOD)  from Aqua and Terra MODIS, we obtained a pretty good fit for one site. We now intend to use GEOS-Chem to model aerosol vertical distributions for Nairobi during the time period that we are considering in order to compare results.

Group Website:

Contact: Priyanka deSouza (Research Fellow), email: desouzap [at] mit [dot] edu


Michigan Technical University
Houghton, Michigan, USA

Wu Group

We use GEOS-Chem to work on various research topics related to atmospheric chemistry and air quality, such as:

  1. Interactions among climate, atmospheric chemistry and land use/land cover;
  2. The intercontinental transport of air pollutants and other tracer gases;
  3. Impacts of climate-induced extreme meteorological events on air quality;
  4. Impacts of global change on deposition of Hg and other atmospheric species to the Great Lakes.

Group Website:

Group Leader: Shiliang Wu (Associate Professor)

Group Members: Please see this listing


University of Minnesota
Minneapolis, Minnesota, USA

Millet Group

We apply GEOS-Chem to interpret satellite and in situ measurements of the troposphere, with a focus on biosphere-atmosphere exchange and organic chemistry in the atmosphere.

Group Website:

Group Leader: Dylan Millet (Professor)

Group Members: Please see this listing


Meteorological Research Institute / Japan Meteorological Agency
Tsukuba, Japan

Yumimoto Group

Group Website:

Group Leader: Keiya Yumimoto (Senior Researcher)

Group Members: Please see this listing


University of Montana
Missoula, MT, USA

Hu Group

Group Website:

Group Leader: Lu Hu

Group Members: Please see this listing


Nanjing University for Information Science & Technology (NUIST)
Nanjing, China

Liao Group

We are applying the GEOS-Chem model to understand the formation and transport of air pollutants over China.

Group Website:

Group Leader:

  • Hong Liao (Professor); email: hongliao [at]


NASA AMES Research Center
Mountain View, California, USA

Johnson Group

Our group uses GEOS-Chem to better understand processes impacting trace gas (e.g., O3, NOx, CO) and aerosol emission, transport, chemical transformation, and deposition fluxes on a regional and global scale. We also use the model to evaluate bioavailable nutrient (e.g., Fe, P, N) deposition to the global oceans and the impact on marine biogeochemistry and climate. Currently, we are applying GEOS-Chem to inter-compare and evaluate multiple biosphere carbon model predictions of CO2 fluxes and the impact they have on "top-down" estimates of CO2 fluxes using OCO-2 satellite observations.

Group Website:

Group Leader: Matthew Johnson (Research Scientist); email: matthew.s.johnson [at]


NASA Goddard Space Flight Center
Greenbelt, Maryland, USA

Global Modeling and Assimilation Office

GMAO produces the GEOS meteorological fields that are used to drive GEOS-Chem. GEOS-Chem is also being adapted for use as a chemical module in the GMAO GEOS-DAS (Data Assimilation System).

Group Website:

Group Leader: Steven Pawson ; email Steven-Pawson-1 [at]


NASA Jet Propulsion Laboratory
Pasadena, California, USA

Bowman Group

Our research focuses on the assimilation satellite observations into  the GEOS-Chem model in order to understand the drivers of atmospheric composition with applications to both climate and air quality.  Our research includes  atmospheric chemistry and the carbon cycle with active efforts investigating ozone, carbon monoxide, carbon dioxide, methane, and fluorescence.   We use these studies to assess the value of current satellite observations and provide guidance toward the development of future observing systems.  

Group Website:

Group Leader: Kevin Bowman (Deputy PI, TES; JPL PI, Carbon Monitoring System Flux Pilot Project)

Group Members: Please see this listing

Group Projects: Carbon Monitoring System Flux (CMS Flux)


NASA Langley Research Center
Hampton, Virginia, USA

Fairlie Group

I am using GEOS-Chem to study mineral dust mobilization, intercontinental transport, deposition, and chemical transformation, and and use the model to interpret observations from satellite (e.g. CALIPSO), airborne and ground-based instruments.

Group Website:

Group Leader: T. Duncan Fairlie (Research Scientist); email t.d.fairlie [at]


National Academy of Sciences of Belarus
Minsk, Belarus

Institute of Physics

We use the GEOS-Chem model to study the distribution and transport of air pollutants

Group Website: TBD

Group Leader: Natalia Miatselskaya; email: natalia_met [at]

Group Members: Vitaly Kabashnikov


National Institute of Aerospace
Hampton, Virginia, USA

Liu Group

We are using GEOS-Chem to investigate the radiative effects of aerosols and clouds on tropospheric chemistry, constraints from radionuclide tracers on transport and wet removal of trace gases and aerosols, continental versus marine influences on tropospheric aerosols over the North Atlantic, and sources and variability of tropospheric ozone in East Asia.

Group Website:

Group Leader: Hongyu Liu (Research Fellow)

Group Members:

  • Bo Zhang (Research Scientist)
  • Erika Brattich (collaborator, University of Bologna, Italy)


National Institute for Environmental Studies
Tsukuba, Japan

Global Atmospheric Chemistry Section

The Global Atmospheric Chemistry Section at NIES is broadly interested in the composition of the Earth's atmosphere. Our main work includes distributions, long-range transport, and long-term trends of tropospheric ozone and its precursors. We use GEOS-Chem to analyze field measurements at surface stations and onboard ships in Asia and Oceania regions.

Group Website:

Group Leader: Hiroshi Tanimoto (Head); email: tanimoto [at]

Group Members:

  • Kohei Ikeda (Postdoctoral Fellow); email: ikeda.kohei [at]
  • Sachiko Okamoto (Postdoctoral Fellow); email: okamoto.sachiko [at]
  • Kimiko Suto (Programmer); email: suto.kimiko [at]


National and Kapodistrian University of Athens
National Observatory of Athens
Athens, Greece

Our research mainly focuses on the study of air pollution (gases and aerosol) in global and regional scale as well; in the last case, GEOS-Chem with nested-grid capabilities is applied over Europe to study CO, O3, aerosol and other species concentrations levels. One of our recent works involves model's results for AEGEAN-GAME airborne campaign, which took place over the Aegean Sea in Greece (Eastern Mediterranean) during an Etesian wind regime period (September 2011). More model results is planned to be provided in high resolution for other field campaigns, too.

The coupling procedure of GEOS-Chem with other models (UAM-V, PMCamx) has been developed for Greece by providing initial and boundary conditions to the meso-scale models and by matching the two models' chemistry mechanisms. Moreover, the global model was applied to assess the impact of aircraft emissions on O3 and NOx, examine the N. American and Asian emissions' contribution on European budget and the European outflow towards the Eastern Mediterranean.

Climate change impacts, under the A1B emissions scenario, in European air-quality for the 2050 future period are also assessed using the GEOS-Chem global transport model driven by meteorological fields from the GISS/GCM. We focus in the possible responses of European air quality both due to climate change alone and due to the combined effects of climate change and changing future air pollution emissions.

Group Websites:

Group Members:

  • Maria Tombrou (Associate Professor); email: mtombrou [at]
  • Christos Giannakopoulos (Senior Researcher); email: cgiannak [at]
  • Anna Protonotariou (PhD); email: aprot [at]
  • Kostas Varotsos (PhD); email: kvarotso [at]


National Taiwan University
Taipei, Taiwan

Chen Group

Our research aims at developing and improving the aerosol and cloud parameterizations and emission inventory in global and regional model, particularly for investigating the issues of air quality and climate effects over Asia. We focus on employing GEOS-Chem to run sensitivity simulations to improve upon current simulations employing NCAR CESM model and WRF-Chem—with the newly developed statistical aerosol parameterization scheme (SNAP)—and validate against the data from satellite retrievals and various ground observation networks.

Group Website:

Group Leaders:

  • Jen-Ping Chen (Professor); email: jpchen [at]
  • Wei-Ting Chen (Assistant Professor); email: weitingc [at]

Group Members:

  • I-Chun Tsai (Assistant Research Scientist)
  • Timmy Francis (Postdoctoral Fellow)


Naresuan University
Phitsanulok, Thailand

Our work should involve the aerosol group and Hg and POPs group.

Group Website:

Group Leader: Tanapon Phenrat (Assistant Professor)

Group Members: Win Trivitayanurak (Adjunct Faculty)


Nazarbayev University
Astana, Kazakhstan

We are working on a project related to NO2 column over Kazakhstan, in conjunction with Dr. Shannon Capps at Drexel Univerisity.

Group Website:

Group Leader: Mehdi Amouei Torkmahalleh (Assistant Professor)

Group Members: Zhuldyz Darynova


University of Nigeria
Nsukka, Nigeria

We are presently working on a research to map the PM 2.5 over Nigeria from 2000-2015.

Group Website:

Group Leader: Onyeuwaoma Nnaemeka Dom (Scientific Officer)


NOAA Earth System Research Laboratory
Boulder, Colorado, USA

We are using GEOS-Chem to simulate atmospheric CO2, CH4, and CO distributions. We hope to extend our CarbonTracker CO2 analysis system to use both GEOS-Chem/MERRA2 and TM5/ERA-interim transport models.

Group Website:

Group Leader: Andy Jacobson


North Carolina State University
Raleigh, North Carolina

Meskhidze Group

We are working on GEOS-Chem estimates of aerosol type inferred from NASA Langley High Spectral Resolution LiDAR (HSRL) using data collected during the SABOR campaign. We also have current work aimed at understanding the global distribution of aerosol soluble iron (sol-Fe).

Group Website:

Group Leader: Nicholas Meskhidze (Associate Professor); email nmeskhi [at] ncsu [dot] edu


ParaTools, Inc.
Baltimore, Maryland, USA

We are developing a new chemical kinetics preprocessor (Kppa) that will enable GEOS-Chem on accelerator architectures like GPUS and the Intel Xeon Phi coprocessor

Group Website:

Group Leader: John Linford (Scientist)


University Paul Sabatier
Toulouse, France

Sauvage Group

We are using GEOS-Chem to investigate physical and chemical processes related to tropospheric ozone and its precursors, and to interpret in situ and satellite observations (IAGOS, IASI).

In particular we focus on:

  • lightning NOx influence on the nitrogen species and on the ozone budget (development of the sub-grid chemistry of lightning plumes, inter-comparison with lightning NOx observations from aircraft campaigns and IAGOS observations) over specific regions (North America, Atlantic, Europe, Tropics)

  • contribution of biomass burning and anthropogenic pollution on the troposphere, with a focus over the Tropics (South America, Africa, South-East Asia) and the Southern Hemisphere

Group Website:

Group Leader: Bastien Sauvage (Assistant Professor)

Group Members:

  • Brice Barret (Researcher)


Peking University
Beijing, China

Fu Group

We use GEOS-Chem to study aerosols and organic gases in the troposphere, including their emissions from land and sea, transport, and chemical evolutions and impacts. Our particular focus is the effects on air quality and climate in Asia.

Group Website:

Group Leader: Tzung-May Fu (Assistant Professor)

Group Members: Please see this listing

Li Group

We will use GEOS-Chem to model the sulfate transformation,transport,and sulfur deposition in East Asia.

Group Website:

Group Leader: Bengang Li (Professor)

Group Members: Xiaoli Wang, email: 1401214711 [at] pku [dot] edu [dot] cn

Lin Group

Our group studies atmospheric pollution and interactions with climate, with a particular interest in Chinese air pollution, its global impacts and its susceptibility to upstream pollution.

Our current work includes top-down analysis of nitrogen pollution and source attribution, aerosol impacts on climate and multi-decadal variability, low-complexity two-way coupling of GEOS-Chem and its multiple nested models, etc.

Group Website:

Group Leader: Jintai Lin (Associate Professor with Tenure)

Group Members: Please see this listing

Song Group

I plan to study emissions (using inverse modeling techniques) and transport from agriculture in China.

Group Website:

Group Leader: Yu Song


Tao Group

We plan to use GEOS-Chem to study mercury in the troposphere, including its emissions, transport and deposition in China, especially in North China.

Group Website:

Group Leader: Shu Tao (Professor)

Group Members:

  • Han Chen (Graduate Student); email: chenhanurban [at]
  • Long Chen (Graduate Student); email: chl [at]


Pennsylvania State University
State College, Pennsylvania, USA

Brune Group

We intend to use GEOS-Chem to globally model HOx concentrations and compare these to existing datasets. We are also interested in performing an analysis to determine the sensitivities and uncertainties of GEOS-Chem HOx modeling.

Group Website:

Group Leader: Bill Brune (Professor)

Group Members: Kenneth Christian (Graduate Student)


Portland State University
Portland, Oregon, USA

Butenhoff Group

We primarily use GC for inverse modeling of methane but also for SOA simulations.

Group Website:

Group Leader: Christopher Butenhoff (Assistant Professor)


Purdue University
West Lafayette, Indiana, USA

Zhuang Group

At Purdue, we are coupling a biogeochemistry model of TEM with GEOS-Chem for investigating global methane cycle.  The study is supported by NASA.

We also plan on using satellite remote sensing of CO2 data. The higher spatial and temporal density remote sensing data has the potential to reduce the uncertainty of the atmospheric transport inversion modeling. We propose to use satellite level CO2 data to reduce the atmospheric transport chemistry model (GEOS-Chem) uncertainty from initial states and boundary condition of surface fluxes, which will finally constrain and improve our ecosystem model and further our knowledge about global carbon sources/sinks.

Group Website:

Group Leader: Qianlai Zhuang (Assistant Professor)

Group Members: Please see this listing


Qatar Environment & Energy Research Institute
Doha, Qatar

Our research focuses on understanding the links between the environment and the quality of the water resources available to the State of Qatar. Namely, looking at the impacts of air quality and climate change on water quality and characterizing the natural and anthropogenic contaminants within the water.

Group Website:

Group Contact: Mohammed Ayoub (Research Scientist)


Ramboll Environ
Novato, California, USA

We are the developers and distributors of the publicly-available CAMx regional photochemical transport model ( and have been using GEOS-Chem products for a couple of years as a source of boundary conditions for annual simulations that we've performed for the regulator and regulated communities. We plan on using GEOS-Chem in-house to support CAMx modeling, as well as to perform research in the areas of intercontinental ozone and PM transport and chemistry.

One of our principals in the Novato office, Dr. Greg Yarwood, is co-developer of the Carbon Bond 2005 photochemical mechanism and has been involved in biogenic emission model development with Dr. Alex Guenther.

Group Website:

Group Leader: Christopher Emery (Senior Manager)

Group Members: Jaegun Jung (Senior Associate)


University of Rochester
Rochester, NY, USA

Murray Group

We use GEOS-Chem to examine chemistry-climate interactions across a variety of time scales (paleo, present day, and near future), including the development and use of a coupled interface with the NASA GISS ModelE GCM.

Group Website:

Group Leader: Lee T. Murray (Assistant Professor)

Group Members: Please see group website


RWDI Air, Inc.
Calgary, Alberta, Canada

Hosseini Group

We will use GEOS-Chem for a joint project between University of Calgary and RWDI AIR Inc.  We plan to use GEOS-Chem for global simulations of Ozone to define the boundary conditions for photochemical simulations in North America.

Company Website:

Group Leader: Zahra Hosseni (Project Engineer), email: Zahra [dot] Hosseini [at] rwdi [dot] com


Seoul National Univerity
Seoul, South Korea

Park Group

Our interests lie in regional air pollutions and interactions between climate and air chemistry over East Asia. We are using GEOS-Chem to examine regional aerosol distributions and their radiative forcing in East Asia. We also develop a linking tool to drive GEOS-Chem using CCSM3 outputs to study the impacts of future climate change on air chemistry and vice versa.

Group Website:

Group Leader: Rokjin Park (Associate Professor)

Group Members: Please see this listing


State University of New York at Albany
Albany, New York, USA

Yu Group

We are using GEOS-Chem to study the importance of new particle formation and growth in global aerosol abundance. Contribution of different nucleation mechanisms and emission of precursors from different sources will be investigated.

Group Website:

Group Leader: Fangqun Yu (Research Associate and Professor)

Group Members: Please see this listing


University of Tennessee
Knoxville, Tennessee, USA

Fu Group

We use GEOS-Chem to evaluate source-receptor relationships for ozone and PM2.5 globally. We are working on improving the black carbon emission inventory in the arctic areas and updating the emissions inventory in GEOS-Chem. We use GEOS-Chem and regional chemistry model CMAQ to establish Policy Relevant Background (PRB) ozone concentrations in US. In addition to global studies, we also apply dynamical downscaling method to GEOS-Chem and hemispheric CMAQ and provide initial and boundary conditions for CMAQ.

Group Website:

Group Leader: Joshua Fu (Professor)

Group Members: Please see this listing


University of Texas
Dallas, Texas, USA

Lary Group

We plan to use GEOS-Chem to model PM2.5 and AOD for the period 2000–present.

Group Website:

Group Leader: David Lary

Group Members:

  • Brian Nathan
    • I am focusing on global-scale modeling of methane transport from emissions at shale gas drilling sites where hydraulic fracturing is used.
  • Ed Graef
    • I am focusing on dust modeling using new very high resolution (5 km) dust sources. We can produce these maps every 18 days over the last ten years using remote sensing and machine learning data to identify the spectral reflectance signatures of dust sources. We would like to implement this in GEOS-Chem.


Texas A&M University at Galveston
Galveston, Texas, USA

Wang Group

We will use GEOS-Chem to validate and constraint emission inventories, and apply GEOS-Chem to understand the emission and transport of air pollutants over China.

Group Leader: Yuxuan Wang; email: wangyx [at]


Texas Tech University
Lubbock, Texas, USA

Cao Group

We are researching the impact of particulate matter exposure on public health, and plan to use the GEOS-Chem model to estimate ground-level PM2.5 concentration for China

Group Website:

Group Leader: Prof. Guofeng Cao

Group Members: Ying Liu (PhD candidate), email: ying [dot] liu [at] ttu [dot] edu


University of Toronto
Toronto, Ontario, Canada

Chen Group

My research lab at University of Toronto plans to use GEOS-Chem for studies of global carbon flux inversion. I am collaborating with the International Institute of Earth System Science at the University of Nanjing, China on the construction of a China carbon tracker. We have decided to use GEOS-Chem as one of the atmospheric transport models for this purpose.

Group Website:'s homepage/home.htm

Group Leader: Jing Chen (Professor)

Group Members: Please see this listing

Jones Group

We are using GEOS-Chem to interpret recent satellite observations of trace gases in the troposphere, with a particular focus on understanding how pollution influences the composition of the lower atmosphere. Using inverse modeling and chemical data assimilation techniques, we seek to better quantify the surface emissions of precursors of O3 and other environmentally important trace gases and to obtained an improved understanding of how these gases are exported to the global atmosphere.

Group Website:

Group Leader: Dylan Jones (Associate Professor)

Group Members: Please see this listing

Liu Group

My main interest of using GEOS-Chem is to study transport of air pollutants. I am also affiliated with Nanjing University in China.

Group Website:

Group Leader: Jane Liu (Assistant Professor)


Tsinghua University
Beijing, China

Center for Earth System Science

We use the GEOS-Chem model to investigate anthropogenic emissions over the Asian region. We are also developing emission modules for the GEOS-Chem model.

Group Website:

Group Leader: Qiang Zhang (Professor)


Center of Atmospheric Sciences,
Universidad Nacional Autonóma de México (UNAM)
Ciudad Universitaria (Mexico City), Mexico

Nunez Group

We plan to develop a black carbon radiative forcing methodology for Mexico, using the GEOS-Chem model.

Group Website:

Group Leader: Xochitl Cruz Nunez


Universidad San Francisco de Quito
Quito, Ecuador

Cazorla Group

We are interested in running GEOS-chem to use it along with our sounding data.

University Website:

Group Leader: Maria Cazorla (Professor), email mcazorla [at] usfq [dot] edu [dot] [ac]


University of Washington
Seattle, Washington, USA

Alexander Group

My research involves incorporating oxygen isotope measurements into the GEOS-Chem model as a tracer of sulfur and nitrogen chemistry in the atmosphere. This can be used to better understand natural and anthropogenic influences on the oxidizing capacity of the atmosphere.

Group Website:

Group Leader: Becky Alexander (Associate Professor)

Group Members: Please see this listing

Jaeglé Group

Our focus is to quantify biomass burning emissions over Africa using GOME observations of NO2 and HCHO together with the GEOS-Chem model. We are also interested in understanding long-range transport of pollution from Asia to the Northeast Pacific with the GEOS-Chem model.

We are also examining the role of the ocean in the global mercury cycle and are modeling the wet deposition in the southeasten US with the high-resolution nested grid simulation.

Group Website:

Group Leader: Lyatt Jaeglé (Professor)

Group Members: Please see this listing


University of Wollongong
Wollongong, New South Wales, Australia

Centre for Atmospheric Chemistry

We use GEOS-Chem to interpret trace gas observations from remote-sensing (TCCON, NDACC), in-situ (ship, train), and satellite platforms. Our focus is on understanding Southern Hemisphere atmospheric composition, including better constraining the sources, chemistry, and impacts associated with major biomass burning events, biogenic emissions, and local versus transported sources.

Group Website:

Group Leader: Jenny Fisher (Senior Lecturer)

Group Members:

  • Nicholas Deutscher (Research Fellow)
  • Max Desservettaz (Graduate Student)
  • Jesse Greenslade (Graduate Student)
  • Beata Bukosa (Graduate Student)
  • Neil Page (Graduate Student


Yale-NUIST Center on Atmospheric Environment
A collaboration between Yale University (New Haven, Connecticut, USA)
and Nanjing University (China)

We use GEOS-Chem output as initial and lateral boundary conditions for greenhouse gases simulations (e.g., CO2 and CH4).

Group Website:

Group Leader: Jianping Huang (Research Scientist, NOAA); email: hjpfwj [at]


University of York
York, UK

Evans Group

I am interested in the oxidizing capacity of the atmosphere, how well it is understood and how it is changing. By using numerical models of the atmopshere we can attempt to answer these questions.

Group Website:

Group Leader: Mat Evans (Professor)


York University
Toronto, Ontario, Canada

McLaren Group

We are using GEOS-Chem in combination with surface, aircraft, and satellite measurements to investigate methane emissions in Canada, improving characterization of anthropogenic (oil/gas) and biogenic (wetlands) sources.

Group Website:

Group Leader: Robert McLaren (Professor)

Group Members:

  • Sabour Baray (Graduate Student); email: sabour [at]