Ronald Brown Indian Ocean Experiment 1999 cruise. The marine atmosphere over the Southern Indian Ocean was not polluted. The South Asian aerosol is often highly absorbing.
Organic material comprises substantial fraction of the fine aerosol mass.
Haze layer was present in the atmosphere in the mid-troposphere and covered persistently an extensive region of the tropical Indian Ocean. The basin scale biogeography including depthwise and lateral variations in photosynthetic pigments. The inherent optical properties of the tropical Indian Ocean, Arabian Sea, and Bay of Bengal including absorption, scattering, size distribution, and fluorescence properties of marine phytoplankton. The optical thickness of aerosols and their vertical and horizontal distribution over the basin scale region. The water leaving radiance and remote sensing reflectance in relation to pigment concentration.