We are grateful to Dr. J. Tucker of NASA GSFC and Dr. R. Imasu of NIRE in ARGASS (AVHRR GAC dataset for Atmosphere and Surface Studies) project for providing us with AVHRR GAC data used in this study. We wish to extend our gratitude to Dr. L. L. Stowe of NOAA NESDIS for his valuable advice. The ancillary data used in this work for ozone amount are provided by TOMS Ozone processing Team of NASA and for surface wind velocity and water vapor amount by NCEP.
Andreae, M. O., 1993: Global distribution of fires seen from space. Eos, Trans. Amer. Geophys. Union,74, 129–144.
Ångström, A., 1961: Techniques of determining the turbidity of the atmosphere. Tellus,13, 214–223.
Brechtel, R. J., S. M. Kreidenweis, and H. B. Swan, 1998: Air mass characteristics, aerosol particle number concentrations, and number size distributions at Macquarie Island during the First Aerosol Characterization Experiment (ACE 1). J. Geophys. Res.,103, 16 351–16 367.
Cahoon, D. R., Jr., B. J. Stocks, J. S. Levine, W. R. Cofer III, and K. P. O’Neill, 1992: Seasonal distribution of African savanna fires. Nature,359, 812–815.
Carlson, T. N., and R. S. Caverly, 1977: Radiative characteristics of Saharan dust at solar wavelengths. J. Geophys. Res.,82, 3141–3152.
Charlson, R. J., S. E. Schwartz, J. M. Hales, R. D. Cess, J. A. Coakley Jr., J. E. Hansen, and D. J. Hofmann, 1992: Climate forcing by anthropogenic aerosols. Science,25, 426–430.
Che, N., and J. C. Price, 1992: Survey of radiometric calibration results and methods for visible and near infrared channels of NOAA-7, -9, and -11 AVHRRs. Remote Sens. Environ.,41, 19–27.
Chin, M., D. J. Jacob, G. M. Gardner, M. S. Foreman-Fowler, P. A. Spiro, and D. L. Savoie, 1996: A global three-dimensional model of tropospheric sulfate. J. Geophys, Res.,101, 18 667–18 690.
Durkee, P. A., F. Pfeil, E. Frost, and R. Shema, 1991: Global analysis of aerosol particle characteristics. Atmos. Environ,25A, 2457–2471.
Goloub, P., D. Tanré, J. L. Deuzé, M. Herman, A. Marchand, and F. M. Bréon, 1999: Validation of the first algorithm applied for deriving the aerosol properties over the ocean using the POLDER/ADEOS measurements. IEEE Trans. Geosci. Remote Sens.,37, 1586–1596.
Gordon, H. R., and M. Wang, 1994: Retrieval of water-leaving radiance and aerosol optical thickness over the oceans with SeaWiFS: A preliminary algorithm. Appl. Opt.,33, 443–452.
Herman, J. R., P. K. Bhartia, O. Torres, C. Hsu, C. Seftor, and E. Celarier, 1997: Global distribution of UV-absorbing aerosols from Nimbus 7/TOMS data. J. Geophys. Res.,102, 16 911–16 922.
Higurashi, A., and T. Nakajima, 1999: Development of a two channel aerosol retrieval algorithm on global scale using NOAA AVHRR. J. Atmos. Sci.,56, 924–941.
Holben, B. N., and Coauthors, 1998: AERONET—A federated instrument network and data archive for aerosol characterization. Remote Sens. Environ.,66, 1–16.
Husar, R. B., J. M. Prospero, and L. L. Stowe, 1997: Characterization of tropospheric aerosols over the oceans with the NOAA advanced very high resolution radiometer optical thickness operational product. J. Geophys. Res.,102, 16 889–16 909.
Ignatov, A. M., L. L. Stowe, S. M. Sakerin, and G. K. Korotaev, 1995: Validation of the NOAA/NESDIS satellite aerosol product over the North Atlantic in 1989. J. Geophys. Res.,100, 5123–5132.
IPCC, 1996: Climate Change 1995. The Science of Climate Change. Cambridge University Press, 572 pp.
Kaufman, Y. J., and B. N. Holben, 1993: Calibration of the AVHRR visible and near-IR bands by atmospheric scattering, ocean glint and desert reflection. Int. J. Remote Sens.,14, 21–52.
——, and T. Nakajima, 1993: Effect of Amazon smoke on cloud microphysics and albedo-analysis from satellite imagery. J. Appl. Meteor.,32, 729–744.
——, and B. N. Holben, 1996: Hemispherical backscattering by biomass burning and sulfate particles derived from sky measurements. J. Geophys. Res.,101, 19 433–19 445.
Kiehl, J. T., and B. P. Briegleb, 1993: The relative role of sulfate aerosols and greenhouse gases in climate forcing. Science,260, 311–314.
Li, X., H. Maring, D. Savoie, K. Voss, and J. M. Prospero, 1996: Dominance of mineral dust in aerosol light-scattering in the North Atlantic trade winds. Nature,380, 416–419.
Mitchell, J. F. B., T. C. Johns, J. M. Gregory, and S. F. B. Tett, 1995:Climate response to increasing levels of greenhouse gases and sulphate aerosols. Nature,376, 501–504.
Moulin, C., F. Dulac, C. E. Lambert, P. Chazette, I. Jankowiak, B. Chatenet, and F. Lavenu, 1997a: Long-term daily monitoring of Saharan dust load over ocean using Meteosat ISCCP-B2 data 2. Accuracy of the method and validation using sun photometer measurements. J. Geophys. Res.,102, 16 959–16 969.
——, C. E. Lambert, F. Dulac, and U. Dayan, 1997b: Control of atmospheric export of dust from North Africa by the North Atlantic Oscillation. Nature,387, 691–694.
Nakajima, T., and M. D. King, 1990: Determination of the optical thickness and effective radius of clouds from reflected solar radiation measurements. Part I: Theory. J. Atmos. Sci.,47, 1878–1893.
——, and A. Higurashi, 1998: A use of two-channel radiances for an aerosol characterization from space. Geophys. Res. Lett.,25, 3815–3818.
——, M. Tanaka, M. Yamano, M. Shiobara, K. Arao, and Y. Nakanishi, 1989: Aerosol optical characteristics in the yellow sand events observed in May, 1982 in Nagasaki—Part II: Model. J. Meteor. Soc. Japan,67, 279–291.
——, G. Tonna, R. Rao, Y. Kaufman, and B. Holben, 1996: Use of sky brightness measurements from ground for remote sensing of particulate polydispersions. Appl. Opt.,35, 2672–2686.
——, A. Higurashi, K. Aoki, T. Endoh, H. Fukushima, M. Toratani, Y. Mitomi, B. G. Mitchell, and R. Furuin, 1999: Early phase analysis of OCTS radiance data for aerosol remote sensing, IEEE Trans. Geosci. Remote Sens.,37, 1575–1585.
Patterson, E. M., D. A. Gillette, and B. H. Stockton, 1977: Complex index of refraction between 300 and 700 nm for Saharan aerosols. J. Geophys. Res.,82, 3153–3160.
Rao, C. R. N., and J. Chen, 1995: Inter-satellite calibration linkages for the visible and near-infrared channels of the Advanced Very High Resolution Radiometer on the NOAA-7, -9, and -11 spacecraft. Int. J. Remote Sens.,16, 1931–1942.
Santer, B. D., and Coauthors, 1996: A search for human influences on the thermal structure of the atmosphere. Nature,382, 39–46.
Sokolik, I. N., and O. B. Toon, 1996: Direct radiative forcing by anthropogenic airborne mineral aerosol. Nature,381, 681–683.
——, A. Andronova, and T. C. Johnson, 1993: Complex refractive index of atmospheric dust aerosols. Atmos. Environ.,16, 2495–2502.
Stowe, L. L., R. M. Cavoy, and P. P. Pelliguino, 1992: Monitoring the Mt. Pinatubo aerosol layer with NOAA-11/AVHRR data. Geophys. Res. Lett.,19, 159–162.
Taylor, K. E., and J. E. Penner, 1994: Response of the climate system to atmospheric aerosols and greenhouse gases. Nature,369, 734–737.
Tegen, I., A. A. Lacis, and I. Fung, 1996: The influence on climate forcing of mineral aerosols from disturbed soils. Nature,380, 419–422.
Tomasi, C., V. Vitale, and E. Caroli, 1983: Sahara dust program—II. Determination of the vertical particulate mass loading by using extinction models based on Junge-type size distributions. J. Aerosol Sci.,14, 529–539.
Twomey, S. A., M. Piepgrass, and T. L. Wolfe, 1984: An assessment of the impact of pollution on global cloud albedo. Tellus,36B, 356–366.
van de Hulst, H. C., 1957: Light Scattering by Small Particles. Dover, 470 pp.
Yamauchi, T., 1995: Statistical analysis of atmospheric turbidity over Japan: The influence of three volcanic eruptions. J. Meteor. Soc. Japan,73, 91–103.