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Brookhaven National Laboratory

    Senior Scientist
    Environmental and Climate Sciences Department
    Brookhaven National Laboratory, Upton, N.Y. 11973
    Telephone: (631) 344-3100    FAX (631) 344-2887    E-mail


Brookhaven National Laboratory

    Associate Scientist, 1975-77

    Scientist, 1977-90

    Senior Scientist, 1990-

Chief Scientist, Atmospheric Science Program, U.S. Department of Energy, 2004-2009.

Stony Brook University (State University of New York at Stony Brook)

    Assistant Professor (Chemistry), 1969-75

    Adjunct Professor (Institute for Terrestrial and Planetary Atmospheres), 1994-97

Energieonderzoek Centrum Nederland (Netherlands Energy Research Foundation, ECN)

    Visiting Scientist, 1996


Earth energy budget and climate change: Relating global temperature change, forcing, and climate sensitivity, mainly through observations.

Role of tropospheric aerosols as shortwave forcing agents: Direct and indirect radiative forcing by aerosols. Science paper (1992) has over 2700 citations.

Atmospheric radiation: Instrumental in establishment of Department of Energy Atmospheric Radiation Measurement Program. Paper describing this program in the Bulletin of the American Meteorological Society (1994) has over 600 citations.

Cloud chemistry and acid deposition: Demonstrated importance of oxidation by H2O2 in converting SO2 to sulfuric acid deposited in rain through laboratory studies, field measurements, and chemical transport modeling. Demonstrated rapid and highly efficient scavenging of aerosol particles into cloud water. Demonstrated lack of reaction of NO2 in liquid water clouds, contrary to widespread prior understanding. Science paper (1989) was influential on 1992 Acid Deposition amendments to Clean Air Act.

Physical chemistry: Laboratory and theoretical studies of gas- and aqueous-phase kinetics. Delineated roles of mass transport processes in controlling reactions in cloudwater, stimulating much research nationally and internationally.


Books: Authored, 1; edited, 2

National and international reviews, 11

Journal articles and book chapters, 135

Proceedings and abstracts, 240

Reports and reviews, 40

Complete Publication list, PDF format



Harvard College

    A.B. 1963 Magna cum laude

University of California, Berkeley

    Ph.D. 1968 with H. S. Johnston

    NSF Graduate Fellow 1963-67

    Woodrow Wilson Fellow (Hon.) 1963-64

University of Cambridge, England

    Fulbright Post-Doctoral Fellow 1968-69 with B. A. Thrush

    Ramsay Memorial Fellow, 1968-69


Outstanding Leadership Award, U.S. Department of Energy, 2010.

Priestley Lecture. Commonwealth Scientific and Industrial Research Organisation (CSIRO) and Bureau of Meteorology (BoM), Melbourne, Australia, 2011.

Plenary Lecture, Korean Meteorological Society, Autumn Meeting, Daejon, Korea, 2008.

Plenary Lecture, International Workshop on Integrated Responses to Climate Change, Seoul, Korea, 2008.

ISI Highly Cited Researcher, Thompson Scientific, 2006.

Science and Technology Award, Brookhaven National Laboratory, 2006.

Fellow, American Geophysical Union, 2005.

Haagen-Smit Award for an "Outstanding paper" published in Atmospheric Environment, 2003. Citation. BNL News Release.

Fellow, American Association for the Advancement of Science, 2002. BNL News Release.

Plenary Lecture, 16th International Conference on Nucleation and Atmospheric Aerosols, Kyoto, 2004.

Plenary Lecture, 16th Annual Meeting, American Association for Aerosol Research, Denver, 1997.

Plenary Lecture, 14th International Conference on Nucleation and Atmospheric Aerosols, Helsinki, 1996.

Editor's Citation for Excellence in Refereeing, Journal of Geophysical Research - Atmospheres, 1995, 2002.

Sigma Xi, 1969 (University of California, Berkeley).

Phi Beta Kappa, 1963 (Harvard College).


American Association for the Advancement of Science (Fellow)

American Association for Aerosol Research

American Chemical Society and its Divisions of Physical Chemistry and Environmental Chemistry

American Geophysical Union (Fellow)

American Meteorological Society

American Physical Society

Geselschaft für Aerosolforschung

International Union for Pure and Applied Chemistry (Fellow)


Chief Scientist, Atmospheric Science Program, U. S. Department of Energy, 2004-09 .

Co-editor and co-author of several chapters, Atmospheric Aerosol Properties and Impacts on Climate, Climate Change Science Program (U.S.). Synthesis and Assessment Product 2.3, 2009.

Contributing Author, "Couplings Between Changes in the Climate System and Biogeochemistry" In: Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change.

Science Board, (Department of Energy Atmospheric Radiation Measurement Program) Climate Research Facility, 2004-2006.

Scientific Steering Committee, National Aerosol-Climate Interactions Program, 2001.

Lead Scientist, Tropospheric Aerosol Program, U. S. Department of Energy, 2000-2004.

Contributing Author, "Aerosols, their Direct and Indirect Effects" and "Radiative Forcing of Climate Change" in Climate Change 2001 - The Scientific Basis, Intergovernmental Panel on Climate Change.

Steering Committee, Sixth International Conference on Air-Surface Exchange of Gases and Particles, Edinburgh, UK, 2000.

Co-Convener, Symposium on Physical and Atmospheric Chemistry in Honor of Harold Johnston, American Chemical Society, Division of Physical Chemistry, San Francisco CA, 2000.

Management Team, Atmospheric Radiation Measurement (ARM) Program, Department of Energy, 1990-99.

President, Brookhaven Organization of Scientists, 1997-99.

American Geophysical Union, Committee on Global Environmental Change, 1994-98, and Climate Change Panel, 1998. This committee and panel drafted the 1998 AGU Position Statement on Climate Change and Greenhouse Gases. For reaction to this statement, including a statement by then Vice President Gore, click here.

Advisory Board, Tellus B, 1997-2003.

Spotlight Lecture, Colby College, Waterville, ME, 1996.

North American Editor/Chemistry and Editorial Advisory Board, Urban Atmosphere, 1991-95.

Co-chair, Gordon Research Conference, Atmospheric Chemistry, Newport RI, 1995.

Invited witness, Aerosols and Climate, Hearing on the Science Concerning Global Climate Change, Committee on Energy and Natural Resources, U. S. Senate, Washington, DC, 1994.

Steering Committee, ACE-2 (Aerosol Characterization Experiment: Radiative Forcing due to Aerosols over the Polluted North Atlantic Region), 1993-97.

Panel on Atmospheric Effects of Stratospheric Aircraft, National Research Council, 1993.

Editorial Advisory Board, International Journal of Chemical Kinetics, 1993-95.

Invited participant, Mission to Washington--Joint Appeal by Religion and Science for the Environment, U. S. Senate, Washington DC, 1992.

Contributing Author, 1992 IPCC Supplement, Intergovernmental Panel on Climate Change, 1992.

International Union of Pure and Applied Chemistry, Commission on Atmospheric Chemistry, Associate Member, 1991-94; Titular Member, 1995-98 ; Interdivisional Committee on Nomenclature and Symbols, International Union of Pure and Applied Chemistry, Titular Member, 1998- .

Co-chair, Fifth International Conference on Precipitation Scavenging and Atmosphere-Surface Exchange Processes, Richland WA, 1991, and Coordinator (with W. G. N. Slinn) of proceedings, published as Precipitation Scavenging and Atmosphere-Surface Exchange, (Hemisphere, Washington DC, 1992).

Primary Co-author, "Atmospheric Process Research and Development", Report 2 of Acidic Deposition: State of Science and Technology, U. S. National Acid Precipitation Assessment Program, Washington DC, 1991.

Committee on Atmospheric Chemistry, National Research Council, 1988-91.

Associate Editor, Journal of Geophysical Research - Atmospheres, 1986-89.

Committee on Atmospheric Chemistry, American Meteorological Society, 1985-

Associate Editor, Atmospheric Environment, 1984-95. Editor, Trace Atmospheric Constituents, Advances in Environmental Science and Technology, Vol. 12 (John Wiley and Sons, New York, 1983).

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