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The Indian Ocean Experiment

NOAA Research Vessel Ronald H. Brown making ready for the Indian Ocean Cruise

The Indian Ocean Experiment (INDOEX) is investigating the large-scale effects of emissions from Asia on the composition of the atmosphere over the Indian Ocean. In the Indian dry season (Spring), extensive convective clouds form over the oceanic "warm pool." The juxtaposition of very clean air from the Southern Hemisphere with the emissions from a population of one billion makes for an ideal natural laboratory to study the interaction of chemistry, microphysics, radiation, and climate. In 1999, we carried out a major experiment in which we measured the composition of the atmosphere over the Indian Ocean from the NOAA Research Ronald H. Brown. The air over the Indian ocean was heavily polluted with gases and aerosol particles from southern Asia, and these pollutants absorb solar radiation and can have a major impact on global climate.

  • The Composition of the Troposphere over the Indian Ocean During the Monsoonal Transition, K. P. Rhoads, P. Kelley, R. R. Dickerson, T. P. Carsey, M. Farmer, D. Savoie, and J. Prospero, J. Geophys. Res., 102(15), 18,981-18,995, 1997.

  • Tropospheric O3 distribution over the Indian Ocean During Spring 1995 Evaluated with a Chemistry-Climate Model, A. T. J. de Laat, M. Zachariasse, G. J. Roelofs, P. van Velthoven, R. R. Dickerson, K. P. Rhoads, S. J. Oltmans, and J. Lelieveld, J. Geophys. Res., 104(11), 13,881-13,910, 1999.

  • Ozone in the Remote Marine Boundary Layer: A Possible Role for Halogens, R. R. Dickerson, K. P. Rhoads, T. P. Carsey, S. J. Oltmans, and P. J. Crutzen, J. Geophys. Res., 104(17), 21385-21395, 1999.

  • The Indian Ocean Experiment: Widespread air Pollution from South and South-East Asia, J. Lelieveld, R. R. Dickerson, et al., Science, 291(5506), 1031-1036, 2001. pdf version

  • Source Analysis of Carbon Monoxide Pollution During INDOEX 1999, A. T. J. De Laat, G. J. Roelofs, J. Lelieveld, R. R. Dickerson, and J. Lobert,J. Geophys. Res., 106(22), 28,481-28,496, 2001.

  • Marine Boundary Layer Peroxy Radical Chemistry During the AEROSOLS99 Campaign: Measurements and Analysis, Andres-Hernandez, M. D., J. Burkert, L. Reichert, D. Stoebener, J. Meyer-Arnek, J. P. Burrows, R. R. Dickerson, and B. G. Doddridge, J. Geophys. Res., 106(18), 20,833-20,846, 2001.

  • Latitudinal Gradients in O3 and CO During INDOEX 1999, J. W. Stehr, W. P. Ball, R. R. Dickerson, B. G. Doddridge, C. A. Piety, and J. E. Johnson, J. Geophys. Res.,107(19), 2002. file.pdf

  • Analysis of Black Carbon and Carbon Monoxide Observed over the Indian Ocean: Implications for Emissions and Photochemistry, R. R. Dickerson, M. O. Andreae, T. Campos, O. L. Mayol-Bracero, C. Neusuess, and D. G. Streets, J. Geophys. Res., 107(19), 2002. file.pdf

  • Organic Trace Gas Measurements by PTR-MS During INDOEX 1999, A. Wisthaler, A. Hansel., R. R. Dickerson, and P. J. Crutzen, J. Geophys. Res., 107(19), 2002. file.pdf

  • Bulk and Size-Segregated Aerosol Composition: Continental Impacts During INDOEX 1999, W. P. Ball, R. R. Dickerson, B. G. Doddridge, J. Stehr, T. Miller, D. Savoie, T. P. Carsey,.J. Geophys. Res., 108(D10) 10.1029/2002JD002467, 2003. file.pdf

  • Characteristics of Carbonaceous Aerosols Outflow from India and Arabia: Biomass Burning and Fossil Fuel Combustion, S. A. Guazzotti, R. R. Dickerson et al., J. Geophys. Res., 108(D15): Art. No. 4485, 2003. file.pdf

  • Trace Gas and Radical Diurnal Behavior in the Marine Boundary Layer During INDOEX 1999, J. Burkert, M. D. Andres-Hernandez, L. Reichert, J. Meyer-Arnek, J. P. Burrows, B. G. Doddridge, R. R. Dickerson, J. Muehle, A. Zhan, and T. Carsey, J. Geophys. Res., 108(D8), 10.1029/2002JD002790, 2003. file.pdf

  • New Methodology for Estimating Biofuel Consumption in India: Atmospheric Emissions of Black Carbon and Sulfur Dioxide, G. Habib, C. Venkataraman, M. Shrivastava, R. Banerjee, J. W. Stehr, and R. R. Dickerson, Global Biogeochem. Cycles, 18, DOI:0.1029/2003GB002157, 2004. reprint.pdf

  • Particulate Polycyclic Aromatic Hydrocarbons (PAH's) in the Atlantic and Indian Ocean Atmospheres During INDOEX and AEROSOLs99: Continental Sources to the Marine Atmosphere, B. S. Crimmins, R. R. Dickerson, B. G. Doddridge, and J. E. Baker, J. Geophys. Res., 109(5) Art. No. D05308, 2004.