Atmospheric Environment Reseach (AER), Cambridge, MA

• Intercomparisons of observed high altitude tracer fields with 2-D photochemical models (Ko and Wiesenstein).
• Co-convenors (Sze and Ko), Organizing Committee (w/ Butler and Montzka), 1998 Methyl Bromide State of the Science Meeting
• Co-author (w/Elkins), 1998 WMO Report on the Scientific Assessment of Stratospheric Ozone (Ko)
• Contacts: Drs. Dak Sze, Malcolm Ko, and Debra Wiesenstein
• Joint Publications: Wamsley et al., [1997]

Atmospheric Environment Service (AES)-Canada

• Flask measurements of nitrous oxide, SF6, CFC-11, CFC-12, and selected halocarbons since 1989.
• Contacts: Dr. Maris Lusis and Mr. Doug Worthy

Bowdin College, Maine

• Measurement of trace gases in firn air.
• Modeling of trace gases in firn air.
• Contact:  Prof. Mark Battle
• Publications:  Battle et al., [1996], Butler et al., [1999]

Bureau of Meteorology-Australia

• Flask sampling since 1991 at Cape Grim Observatory, Tasmania (with CSIRO)
• Contacts: Mr. Lawrence Porter
• Joint publications: Butler et al., [1994]; Montzka et al., [1994]

California Institute of Technology

• Stratospheric chemistry and transport using airborne and tropospheric data
• Co-chair and organizing committee (Sander and Yung w/Butler), 1998 Methyl Bromide State of the Science Meeting
• Cycling of nitrous oxide (Yung)
• Methyl halide sinks and sources at the Earth's surface
• Contacts: Profs. Yuk Ling Yung, Stanley Sander, and Paul Wennberg
• Joint Publications: L. Jaeglé et al., [1997]; Chang et al., [1996a, 1996b]

Cambridge University, UK

• Chapter Co-Author, 1998 WMO Report on the Scientific Assessement on Ozone Depletion 
• Airborne gas chromatographs.
• Contacts: Prof. John Pyle, Prof. Neil Harris, and Dr. David Lary

Commonwealth Science and Industry Research Organization (CSIRO)-Australia

• Flask sampling since 1991 at Cape Grim Observatory, Tasmania (with the Bureau of Meteorology)
• Co-authors (with Montzka and Butler), WMO 2002, Chapter 1
• Co-authors (with Elkins, Montzka, and Butler), WMO 1998 Report on the Scientific Assessment of Stratospheric Ozone, Chapter 1 and 2
• Operation of ACATS during STRAT and ASHOE/MAESA
• Transport and chemistry in the upper troposphere and lower stratosphere.
• Contacts: Drs. Paul Fraser and L. Paul Steele
• Joint Publications: Wamsley et al., [1997]; Elkins et al., [1996]

DuPont Company, Delaware

• Emissions of Montreal Protocol compounds
• Contacts:  Dr. Don Fisher and Mack McFarland
• Joint Publications:  Elkins et al., [1993]

Forschungsbereich Marine Biogeochemie, Institut für Meereskunde, Kiel, Germany

• Oceanic CCl₄ research.
• Contact:  Dr. Douglas Wallace

Forschungszentrum Jülich GmbH (KFA), Institut fuer Atmosphaerische Chemie, Jülich, Germany

• Intercomparison of trace gas measurements in the atmosphere.
• Contacts: Dr. Ralph Koppmann

Georgia Institute of Technology

• Chapter co-author (w/ Elkins), 1998 WMO Report on the Scientific Assessment on Ozone Depletion, Chapter 1
• Members of AGAGE team and working on intercomparison of data with CMDL
• Contacts: Prof. Derek Cunnold and Prof. Ray Wang

Harvard University

• In situ measurements of tracers at Harvard Forest since 1995. Co-P.I. (McElroy and Elkins) of DOE NIGEC research.
• Chemistry and distribution of atmospheric N2O (McElroy and Wofsy)
• Chemistry and transport in the stratosphere using airborne and ground-based data.
• Total hydrogen budget in the stratosphere (with Anderson).
• Total chlorine and bromine budgets in the stratosphere.
• Modeling of CMDL background data (Spivakovsky)
• Methyl iodide as a tracer of marine convection (Jacob).
• Contacts: Professors Steven C. Wofsy, James Anderson, Daniel Jacob, and Michael B. McElroy, and Dr. Clarissa Spivakovsky.
• Joint publications: Hinsta et al., [1997]; Kohn et al., [1997]; Wamsley et al., [1997]; Woodbridge et al., [1995]; Wofsy et al., [1994], Hurst et al., [1999], Spivakovsky et al., [2000], Montzka et al., [2000], Bell et al., [2002]

Institute of Atmospheric Physics, Moscow

• TROICA experiment
• Contacts:  Drs. Nikolai Elansky, Igor Granberg, and George Golitsyn.

Jet Propulsion Laboratory; California Institute of Technology

• Stratospheric chemistry and transport using airborne and tropospheric data.
• Contacts: Drs. Ross J. Salawitch, Chris Webster, Bob Herman, and James J. Margitan.
• Joint publications: Wamsley et al; [1997]; Volk et al., [1996]; Chang et al., [1996a,b], Woodbridge et al., [1995]; Salawitch et al., [1994a,b; 1993]; Webster et al., [1993], Hurst et al., [2000]

John Hopkins University 

• Stratospheric transport using airborne and tropospheric data. Age of air mass determinations.
• Contacts: Prof. Darryn Waugh
• Joint publications: Waugh et al., [1997a,b; 1994]

Laboratory of Ecogeochemistry and Geochemistry of Rare Earths (LEGRE Lab 775), The United Institute of Geology, Geophysics and Mineralogy, Russan Academy of Science

• Use of halocarbon data to examine transport of pollutants from Russia and China.
• Contacts: Dr. F.Sukhorukov, Dr. E.Malikov.

Massachusetts Institute of Technology

• Co-convenor (Prinn w/Elkins), Workshop on Source Gases for Ozone Depletion in Boulder CO, (jointly hosted by AGAGE-MIT/NOAA-CMDL/NASA-UARP) on May 14-16, 1997.
• Modeling of stratospheric transport using airborne tracer data [Plumb]
• Contacts: Prof. Ron Prinn and Alan Plumb
• Joint publications: Waugh et al., [1997, 1994]

Max Planck Institute for Chemistry, Mainz, Germany

• TROICA experiment.
• Contact:   Drs. Paul Crutzen and Carl Brenninkmeijer.

M&D Consulting, Germany

• Co-author (with Elkins and Montzka), 1998 WMO Report on the Scientific Assessment on Ozone Depletion Chapter 1 and 2.
• Contacts: Dr. Pauline Midgley

NASA AEAP HSRP Program

• Partial funding of operations and construction of ACATS and LACE airborne GCs
• Stratospheric chemistry and transport using airborne and tropospheric data
• Contacts: Dr. Randy Kawa

NASA Ames Research Center

• Nitrous oxide and methane intercomparisons on airborne platforms.
• Stratospheric chemistry and transport using airborne and tropospheric data
• Contacts: Drs. Max Loewenstein, Hans-Jürg Jost, and James Podoksle
• Joint publications: Volk et al., [1996]; Woodbridge et al., [1995]

NASA Goddard Space Flight Center

• Stratospheric chemistry and transport using airborne and tropospheric data.
• Co-mission scientist:  POLARIS and SOLVE
• Contacts: Dr. Paul Newman
• Joint publications: Newman et al., [1996]

NASA UARP, ACMAP, and Radiation Programs

• Partial funding of operations and construction of ACATS and LACE airborne GCs.
• Co-convener, Organizing Committee (w/ Butler and Montzka), 1998 Methyl Bromide State of the Science Meeting.
• Co-convenor (w/Elkins), Workshop on Source Gases for Ozone Depletion in Boulder CO, (jointly hosted by AGAGE-MIT/NOAA-CMDL/NASA-UARP) on May 14-16, 1997.
• Co-Author (w/Butler and Montzka), 1998 WMO Report on the Scientific Assessment on Ozone Depletion, Chapter 2.
• Contacts: Drs. Michael Kurylo, Phil DeCola, and Don Anderson

National Center for Atmospheric Research (NCAR), CO

• Photochemistry and tracer measurements during MLOPEX experiments.
• Hydrocarbon and PAN (w/Moore) measurements.
• Halocarbon standards intercomparison.
• Contacts: Drs. Elliot Atlas, Eric Apel, Chris. A Cantrell, Sue Schauffler, Frank Flock, and Julia Lee-Taylor
• Joint Publications: Wamsley et al., [1997]; Atlas et al., [1996]; Woodbridge et al., [1995]; Cantrell et al., [1992], Schauffler et al., [2002]

NOAA/Aeronomy Lab (AL)

• Co-principal investigator (w/Elkins) of ACATS, ACATS-IV, and LACE (Fahey).
• Co-investigator (w/Elkins) of PANTHER (Fahey).
• Trace gas research in the stratosphere.
• Intercomparison of trace gas measurements (Goldan, deGouw)
• Gas chromatography and standards (Goldan, Kuster)
• Co-author (w/Montzka and Butler) 2002 WMO Report on the Scientific Assessment of Stratospheric Ozone
• Contacts:  Drs. Dan Albritton, Chris Ennis, John Daniel, Adrian Tuck, David Fahey, Ru-Shan Gao, Eric Ray, Susan Solomon, Eric Richard, Karen Rosenlof, Paul Goldan, and Mr. Bill Kuster
• Elkins et al., [1996], Fahey et al., [2001], Richard et al., [2001], Volk et al., [1996,1997], Gao et al., [2001]

NOAA/Atlantic Oceanographic and Meteorological Laboratory (AOML)

• Methyl bromide research.
• Oceanic sources of trace gases.
• Contact:  Drs. Shari Yvon-Lewis and Rik Wannikhof

NOAA/Pacific Marine Environment Laboratory (PMEL)

• Oceanic Trace Gas Research.
• Contacts:   Drs. Dick Feeley, John Bullister, and Tim Bates.

Pennsylvania State University

• Trace gases in firn air (Co-Author and Collaborator)
• Former OMS Project Scientist (Brune)
• Contacts: Dr. Todd Sowers and Prof. William Brune

Physical Research Laboratory, India

• Co-author (w/ Montzka and Butler), 1998 WMO Report on the Scientific Assessment on Ozone Depletion, Chapter 2
• Co-author (w/ Montzka and Butler), 2002 WMO Report on the Scientific Assessment on Ozone Depletion, Chapter 1
• Contacts: Dr. Shyam Lal

Princeton University, NJ

• Measurement of trace gases in firn air.
• Contacts: Prof. Michael Bender 
• Joint Publications: Battle et al., [1996], Butler et al., [1999]

RIVM (National Institute of Public Health and The Environment)

• WMO 2002 (with Montzka), co-author, Chapter 1
• Contact:  Dr. Guus Velders

Scripps Institution of Oceanography, CA

• Intercomparison of trace gas measurements in the atmosphere.
• Intercomparison of trace gas standards (Hall, Elkins).
• Trace gas research.
• Collaborator at Trinidad Head, CA site.
• Contacts: Prof. Ray F. Weiss,  and Drs. Ben Miller and Jeff Severinghouse
• Joint Publication:  Battle et al., [1996]

United Kingdom Meteorological Office, Bristol

• Co-author (w/Montzka and Butler, WMO 2002 Report on the Scientific Assessment on Stratospheric Ozone, Chapter 1 
• Contact:  Dr. Dick Derwent

Universitaet Frankfurt, Germany-- Institut fuer Meteorologie und Geophysik

• Mixing fractions and entrainment times in the tropical and extratropical stratosphere
• Contacts: Prof. U. Schmidt, Dr. C. Michael Volk, and Dr. Andreas Engel

University of Bristol, England

• Chapter co-author (w/Montzka), 1998 WMO Report on the Scientific Assessment on Ozone Depletion, Chapter 2
• Contacts: Dr. Peter Simmonds

University of California at Irvine

• Total bromine and chlorine budget in the stratosphere.
• Intercomparison of trace gas measurements in the atmosphere.
• Methyl bromide research.
• Hydrocarbon research.
• Analysis of trace gases in firn air (Saltzman).
• Co-investigator (w/Butler) in methyl bromide research grant (Saltzman).
• Contacts: Profs. Sherwood Rowland, Don Blake, Eric Saltzman, and Michael Prather 
• Joint publications: Wamsley et al., [1997]; Atlas et al., [1996]; Blake et al., [1992]

University of Colorado, Boulder

• Total bromine and chlorine budget in the stratosphere.
• Co-project scientist of CRYSTAL-FACE (Toon).
• Intercomparison of atmospheric trace gas measurements 
• Prof. O. Brian Toon and Darrin Toohey, Dr. Christine Karbiwnyk

University of Colorado, Institute for Alpine and Arctic Research (INSTAAR)

• Development of calibration system standards for analysis of atmospheric sesquiterpenes.
• Contact:  Dr. Detlev Helmig

University of Colorado, Mountain Research Station

• Measurement of trace gases using flasks and in situ GCs at Niwot Ridge, CO.
• Contacts: Mr. Mark Losleben

University of Dalhousie, Canada

• Methyl bromide Research
• Intercomparison of trace gas measurements
• Air-Sea Exchange Cruise - 1998
• Contacts: Prof. Robert Moore

University of East Anglia, England

• Intercomparison of trace gas measurements in the atmosphere.
• Cooperative Research Cruises for 1998
• Methyl bromide research
• Contacts: Prof. S. A. Penkett, Drs. Claire Reeves, William T. Sturges, Wendy Broadgate, and Dave Oram.
• Joint Publications: Wamsley et al., [1997]

University of Goteburg, Sweden

• Oceanic CCl4 research
• Contacts: Dr. Elisabet Fogelqvist

University of Miami, FL

• Theoretical modeling of stratosphere.
• Methyl bromide research.
• Modeling of methyl bromide in the atmosphere and ocean.
• Contacts: Prof. Jose Rodriguez and Dr. Kelly Goodwin
• Joint publications:  Butler and Rodriguez [1996]

University of New England, Maine and Bigelow Laboratory

• Co-Investigator (w/Butler) in methyl bromide research grant
• Contacts: Dr. Paty Matrai

University of Southampton, UK

• Calibrations, Cooperative Research Cruises for 1998
• Contacts: Dr. Denise Smythe-Wright

University of Washington

• Air-Sea Exchange Cruise - 1998
• Contacts: Dr. William Asher

Utrecht University, Netherlands

• Studies on methyl chloroform in the atmosphere
• Intercomparison of trace gas measuments
• Contacts:  Prof. Jos Lelieveld (now at MPI, Mainz), Dr. Maarten Krol, and Mr. Bert Scheeren

Woods Hole Oceanographic Institution

• Air-Sea Exchange Cruise - 1998
• Contacts: Drs. W.R. McGillis and J.B. Edson

York University, Canada

• Analyses of trace gases in the atmosphere
• Contacts:  Prof. Jochen Rudolph