GEOS–Chem at
Harvard Atmospheric Chemistry Modeling Group

http://www.as.harvard.edu/chemistry/trop/

Jennifer Logan
Senior Research Fellow

Post-Doctoral Fellows
Nicole Downey
Rynda Hudman
Ray Nassar
Yuxuan Wang
Shiliang Wu
Maria Val Martin

Graduate Students
Easan Drury
Duncan Fairlie
Jenny Fisher
Christopher Holmes
Monika Kopacz
Eric Leibensperger
Lee Murray
Justin Parella
Bess Sturges
Moeko Yoshitomi
Lin Zhang
Peter Zoogman

Programming Staff
Bob Yantosca
Philippe Le Sager

We are applying GEOS–Chem to simulations of tropospheric ozone and related species, aerosols, mercury, carbon, and biogenic gases. 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.

GEOS–Chem at
Harvard University Enviromental Chemistry Group

http://www.deas.harvard.edu/environmental-chemistry/

Scot Martin
Professor

We are looking at the effect of aqueous versus crystalline sulfate-nitrate-ammonium tropospheric particles on global aerosol direct radiative forcing and atmospheric chemistry. In our first results, we find aerosol forcing of -0.750 W/m² when aerosol is assumed to follow the lower side of the hysteresis loop, which contrasts to -0.930 W/m² for the assumption of upper side behavior.

GEOS–Chem at
Harvard School of Public Health

http://www.hsph.harvard.edu/researchers/yangliu.html

Yang Liu
Research Fellow,
Department of
Environmental Health

We use GEOS–Chem aerosol simulation results together with satellite aerosol remote sensing data in regional scale PM2.5 exposure modeling and health studies.

GEOS–Chem at
Atmospheric & Environmental Research, Inc.

http://www.aer.com

Christian Seigneur
Group Leader

Kristen Lohman

AER plans to use GEOS–Chem to simulate the atmospheric fate and transport of mercury at the global scale. To maintain continuity with previous AER work, AER plans to incorporate its mercury chemistry for initial work with GEOS–Chem. Following this initial effort, it is anticipated that the standard GEOS–Chem will be used by AER.

AER will use GEOS–Chem to provide boundary conditions to continental-scale models such as TEAM and CMAQ–MADRID–Hg. AER also plans to use GEOS-Chem to investigate the sensitivity of global mercury concentrations to emissions.

GEOS–Chem at
California Institute of Technology

http://www.che.caltech.edu/groups/jhs/research.html

John Seinfeld
Professor

Post-Doctoral Fellows
Amir Hakami

Graduate Students
Anne Chen
Havala (Taylor) Pye

The Caltech effort is focused on adding to GEOS–Chem a state-of-the-science treatment of size-resolved and chemically-resolved aerosols.

GEOS–Chem at
University of California, Santa Cruz

http://people.ucsc.edu/~pchuang/

We are using GEOS–CHEM to study the atmospheric physical and chemical processes dealing with iron cycle. Our purpose is to better characterize and quantify soluble iron deposition to the ocean, which is an important regulating factor for ocean ecosystem functioning and CO2 uptake by phytoplankton. We specifically focus on the iron limited North Eastern Pacific region. A specific attention is paid to the role of anthropogenic emission in the atmospheric iron cycle, as well as the spatio-temporal variability of deposition over pluri-annual time scale.

GEOS–Chem at
Carnegie–Mellon University

http:/www.ce.cmu.edu/~adams/

Peter Adams
Professor

Graduate Students
Win Trivitayanurak

We are researching the aerosol indirect effect, developing global models of aerosol microphysics, and developing a size-resolved simulation of aerosol microphysics in the GEOS–Chem model.

GEOS–Chem at
Chinese Academy of Sciences, Beijing

State Key Laboratory
of Atmospheric Boundary Layer Physics and Atmospheric Chemistry
Institute of Atmospheric Physics

Hong Liao
Professor

Zifa Wang
Professor

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

GEOS–Chem at
CIEMAT, Spain

http://www.ciemat.es

We are intending to use the GEOS–Chem model to better understand the behavior of air pollutants in the upper troposphere.

GEOS–Chem at
Colorado State University

http://www.atmos.colostate.edu/~heald/

Colette Heald
Assistant Professor

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 sources and budgets of aerosols and (2) investigating the mechanisms and impacts of long-range pollution transport.

GEOS–Chem at
Institute for Atmospheric Pollution,
Consiglio Nazionale delle Ricerche
Rende, Italy

Ian Hedgecock
Project Leader

The production of spatially and temporally resolved boundary conditions as input to a spatially more highly resolved regional model MECAWEx, which simulates concentration and deposition fields of Hg species over the Mediterranean region, for comparison with measurement results from the MAMCS, MERCYMS and Med-Oceanor projects.

GEOS–Chem at
CSIC–Barcelona

http://www.iiqab.csic.es

We are using the GEOS-Chem model to study the transport, fate and sinks of persistent organic pollutants (POPs) at the global scale. This work allows getting a better understanding of the long-range atmospheric transport of pollutants and their impacts. Currently, we are focusing our study on the fate and transport of CBs and HCHs, but later on, the model will be applied to other chemicals such as PBDEs, PCDD/Fs and other semi-volatile organic compounds.

GEOS–Chem at
Dalhousie University

http://fizz.phys.dal.ca/~atmos/

Randall Martin
Assistant Professor

Post-Doctoral Fellows
Bastien Sauvage

Graduate Students
Neil Moore
Thomas Walker

Scientific Programmer
Aaron van Donkelaar

We use the GEOS-Chem model to support the retrieval and interpret satellite observations of tropospheric composition in the context of in situ measurements. Current projects include development of a retrieval of aerosol single scattering albedo (Hu), retrieving tropospheric NO2 columns (Martin), use of NO2 columns to provide top-down constraints on NOx emissions (Martin), development of an improved bottom-up soil NOx emission inventory (Moore), investigation into the processes affecting tropospheric ozone (Sauvage), assessment of pathways for production of secondary organic aerosols (van Donkelaar), satellite remote sensing of PM2.5 (van Donkelaar), and evaluation of the deposition of reactive nitrogen (Walker).

GEOS–Chem at
Duke University

http://www.nicholas.duke.edu/people/faculty/prasad/research/research.html

Prasad Kasibhatla
Associate Professor

Graduate Students
Quanlin Li

In collaboration with
Jim Randerson (UC Irvine)

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.

GEOS–Chem at
University of East Anglia, UK

www1.uea.ac.uk/cm/home/schools/sci/env/research/themes/Atmospheric%2BSciences

Parv Suntharalingam
Research Associate

GEOS–Chem at
Ecole Polytechnique
Federale de Lausanne, Switzerland

http://lmca.epfl.ch

Isabelle Bey
Assistant Professor

Post-Doctoral Fellows
Sylvia Generoso

Graduate Students
Marion Auvray
Jerome Drevet
Simon Koumoutsaris

We are using the GEOS–Chem model to investigate the long-range transport of pollution with a European perspective (i.e. by looking at the inflow and the outflow to and from Europe). We are also examining the interannual variability of tropospheric ozone over the last decade. Finally, we are investigating the atmospheric nitrogen cycle within the GEOS–Chem model.

GEOS–Chem at
University of Edinburgh, UK

http://www.geos.ed.ac.uk/research/eochem

Paul Palmer
University Lecturer,
School of GeoSciences

Post-Doctoral Fellows
Michael Barkley
Liang Feng
Qian Li

Graduate Students
Anthony Bloom
Claire Bulgin

We are primarily interested in how we can use satellite observations of tropospheric chemical species and inverse methods to further our understanding of tropospheric chemistry.

GEOS–Chem at
Georgia Institute of Technology

http://apollo.eas.gatech.edu

Yuhang Wang
Associate Professor

Graduate Students
Yunsoo Choi
Tao Zeng

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.

GEOS–Chem at
University of Hertfordshire

http://strc.herts.ac.uk/cair/

Rong Ming Hu
Centre for Atmospheric and Instrumentation Research (CAIR), University of Hertfordshire

Our current research topic is atmospheric dynamics and air quality modelling in urban, regional and global scales. We will use GEOS–Chem to generate the boundary condition for regional models. We will use multi-scale models together with satellite measurements to advance our knowledge in air quality and climate change.

GEOS–Chem at
Hong Kong Polytechnic University

http://cse.polyu.edu.hk

Tzung-May Fu
Assistant Professor

We use GEOS–Chem to study the emissions and tropospheric chemistry of volatile organic compounds from natural and anthropogenic sources, with particular focus on their effects on air quality in Asia.

GEOS–Chem at
University of Houston

http://ww.imaqs.uh.edu

Daewon Byun
Professor

Post-Doctoral Fellows
Hee-Jin In

My research group studies multi-scale and multi-pollutant air quality problems. GEOS–Chem provides the global scale linkage to the U.S. EPA's Community Multiscale Air Quality (CMAQ) modeling system, which is an urban/regional scale air quality model. We explore model linkage issues across dynamic scales, chemistry representations, and emissions processing methods.

GEOS–Chem at
Jet Propulsion Laboratory

http://remus.jpl.nasa.gov/geos-chem/people.html

Qinbin Li
Research Scientist

Post-Doctoral Fellows
Chenxia Cai
Timothy Canty
Xun Jiang
Line Jourdain
Nigel Richards
Changshub Shim
Sunita Verma

Technical Staff
Kevin Bowman
Ming Luo
Greg Osterman
John Worden

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.

GEOS–Chem at
KNMI (Royal Netherlands Meteorological Institute)

http://www.knmi.nl/research/

Folkert Boersma
Research Scientist

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.

GEOS–Chem at
CETEMPS
University of L'Aquila, Italy

http://cetemps.aquila.infn.it

Gabriele Curci
Researcher

We are implementing and testing an explicit stratospheric mechanism into the model using GEOS–4 met-fields. We are using GEOS–Chem as large-scale forcing for a regional air-quality model over Europe (Chimere).

GEOS–Chem at
University of Leeds, UK

http://www.env.leeds.ac.uk/research/ias/composition

Mat Evans
NERC Research Fellow, University of Leeds, UK

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.

GEOS–Chem at
University of Leicester, UK

http://www.leos.le.ac.uk/group/

Prof. John Remedios
Department of Physics and Astronomy

Prof. Paul Monks
Department of Chemistry

Graduate Students
Vijay Kanawade

We will use GEOS-Chem carbon monoxide (CO) simulation results together with satellite retrieved CO data to examine CO source strengths and various transport processes.

GEOS–Chem at
University of Minnesota

http://www.atmoschem.umn.edu

Dylan Millet
Assistant Professor

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.

GEOS–Chem at
National Institute of Aerospace

http://research.nianet.org./~hyl/

Hongyu Liu
Senior Research Scientist

I am using the GEOS–Chem model and the NASA Langley/UW Regional Air Quality Modeling System (RAQMS) to examine the effect of clouds on Asian pollution outflow during the TRACE–P aircraft mission.

GEOS–Chem at
National Observatory of Athens, Greece

http://www.meteo.noa.gr

Christos Giannakopoulos
Researcher at the Institute of Environmental Research and Sustainable Development, National Observatory of Athens, Greece

Maria Tombrou
University of Athens, Greece

Anna Protonotariou
University of Athens, Greece

The aim of this collaborative project will be to determine the Asian and European outflow over the Eastern Mediterranean during the different seasons of the year in order to understand and quantify the export of chemically and radiatively important gases and aerosols and their precursors.

GEOS–Chem at
University of Nebraska at Lincoln

http://www.geosciences.unl.edu

Jun Wang
Assistant Professor

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.

GEOS–Chem at
University of New Hampshire

http://airmap.unh.edu/about/investigators.html

Robert Talbot
Principal Investigator

Post-Doctoral Fellows:
Yaping Xiao

We focus on understanding the dynamics and chemistry affecting air quality in New England. GEOS-Chem will be providing global scale linkage to the regional modeling system.

GEOS–Chem at
North Carolina State University

http://www.meas.ncsu.edu/01-about.html

Nicholas Meskhidze
Principal Investigator

Graduate Students
Matthew Johnson

Collaborators
Patrick Chuang
Fabien Solmon
(at UCSC)

We are using GEOS-Chem to better quantify atmospheric transport and transformation of iron (Fe), its deposition to the surface ocean and the possible effect of anthropogenic pollution on fluxes of bioavailable Fe. We are particularly interested in the Southern Ocean, where iron availability for phytoplankton is shaped by where relative contribution of oceanic input of nutrient-rich waters from upwelling and atmospheric input from mineral dust emanating from the arid regions of South America and Australia.

GEOS–Chem at
NOAA / GFDL and Princeton University

http://www.gfdl.noaa.gov/~aff/

Arlene Fiore
Research Scientist

I am a research scientist in the Program of Atmospheric and Oceanic Sciences at Princeton University. GEOS–Chem is one of the modeling tools that I am using to examine the influence of changing biogenic emissions on background ozone

GEOS–Chem at
Seoul National University, Korea

http://airchem.snu.ac.kr/airchem/

Rokjin Park
Assistant Professor

Graduate Students
Jae-In Jeong

GEOS–Chem at
State University of New York at Albany

http://www.albany.edu/~yfq/

Fangqun Yu
Research Associate

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.

GEOS–Chem at
University of Tennessee

Joshua Fu
Assistant Professor

GEOS–Chem at
University of Toronto

http:www.atmosp.physics.utoronto.ca/people/dbj/dbj.html

Dylan Jones
Assistant Professor

Post-Doctoral Fellows
Mark Parrington

Graduate Students
Zhe Jiang
Jane Liu
Dave MacKenzie
Jing Wang

Programming Staff
Mike Seymour

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.

GEOS–Chem at
Virginia Tech

http://people.cs.vt.edu/~asandu/

Adrian Sandu
Professor

GEOS–Chem at
University of Washington

http://www.atmos.washington.edu/

Becky Alexander
Assistant Professor

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.

http://www.atmos.washington.edu/~beckya/

Lyatt Jaegle
Assistant Professor

Post-Doctoral Fellows
Meredith Hastings

Graduate Students
Sarah Strode

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. Finally, we are examining the role of the ocean in the global mercury cycle.

http://www.atmos.washington.edu/~jaegle/research.html

I'm using the GEOS-Chem model to simulate and better constrain the global budget and distributions of H2 and HD (a.k.a. deuterium).

GEOS–Chem at
University of Wollongong, Australia

http://www.uow.edu.au/science/research/acrg

Nicholas Jones
Project Leader

Research Associates
Guergana Guerova
Clare Murphy

We are using GEOS–Chem to investigate biomass burning events in Australia.  Our first goal is to simulate the Canberra fires, January 2003.  Use of GEOS–Chem near-real time products will be envisaged during biomass burning season as a guide for appropriate measurement sites.