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Original Research Papers

Global distribution of aerosol direct radiative forcing in the ultraviolet and visible arising under clear skies

Authors:

N. Hatzianastassiou ,

Laboratory of Meteorology, Department of Physics, University of Ioannina, 45110 Ioannina, Greece, and Foundation for Research and Technology-Hellas, Heraklion, Crete, GR
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B. Katsoulis,

Laboratory of Meteorology, Department of Physics, University of Ioannina, Ioannina, GR
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I. Vardavas

Department of Physics, University of Crete, and Foundation for Research and Technology-Hellas, Heraklion, Crete, GR
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Abstract

A deterministic atmospheric spectral radiative transfer model, that uses comprehensive climatological data, is developed to compute the global distribution of mean monthly clear-sky total direct aerosol radiative forcing in the ultraviolet (UV) and visible, between 0.2–0.85 μm, at the top of the atmosphere (TOA), within the atmosphere and at the Earth’s surface for winter and summer conditions. The aerosol data were taken from the Global Aerosol Data Set (GADS), given for various fixed relative humidity values and for 11 wavelengths within the UV—visible range, both for natural and anthropogenic aerosols. We first derive global climatologies of extinction aerosol optical thickness (AOT), single-scattering albedo (ωaer) and asymmetry factor (gaer), for actual relative humidity values within the aerosol layer, based on the National Centers for Environmental Prediction and National Center for Atmospheric Research (NCEP/NCAR) Reanalysis Project and the Tiros Operational Vertical Sounder (TOVS) datasets. We include the global distribution of cloud cover using the D2 data from the International Satellite Cloud Climatology Project (ISCCP), to define the clear-sky fraction at the pixel level for each month. Supplementary 10-yr climatological data for surface and atmospheric parameters were taken from NCEP/NCAR, ISCCP-D2 and TOVS. Our present analysis allows the aerosol radiative properties and forcings to vary with space, time and wavelength. The computed mean annual global AOT, ωaer and gaer values are found to be 0.08, 0.96 and 0.73, respectively, at 0.5 μm. On a mean monthly 2.5° pixel resolution, aerosols are found to decrease significantly the downward and the absorbed solar radiation at the surface, by up to 28 and 23 W m−2, respectively, producing a surface cooling at all latitudes in both winter and summer. Aerosols are found to generally increase the outgoing solar radiation at TOA (planetary cooling) while they increase the solar atmospheric absorption (atmospheric warming). However, the model results indicate that significant planetary warming, by up to 5 W m−2, can occur regionally, such as over desert areas, due to strong aerosol absorption. A smaller planetary warming (by up to 2 W m−2) is also found over highly reflecting ice- or snow-covered areas, such as Antarctica and Greenland, as well as over Eastern Europe, Siberia and North America. In general, the aerosol-induced surface cooling exceeds the induced atmospheric warming, except for regions characterized by strong aerosol absorption (e.g. deserts). On a mean annual global basis, natural plus anthropogenic aerosols are found to cool the Earth by 0.6 W m−2 (they increase the planetary albedo by 0.28%), to heat the atmosphere by 0.8 W m−2, while they decrease the downward and net surface solar radiation (surface cooling) by about 1.9 and 1.4 W m−2.

How to Cite: Hatzianastassiou, N., Katsoulis, B. and Vardavas, I., 2004. Global distribution of aerosol direct radiative forcing in the ultraviolet and visible arising under clear skies. Tellus B: Chemical and Physical Meteorology, 56(1), pp.51–71. DOI: http://doi.org/10.3402/tellusb.v56i1.16400
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  Published on 01 Jan 2004
 Accepted on 18 Jun 2003            Submitted on 19 Nov 2002

References

  1. Ackerman , S. A . 1997 . Remote sensing aerosols using satellite infrared observations . J. Geophys. Res . 102 , 17 069-17 079 .  

  2. Ackerman , S. A. , Toon , O. B. , Stevens , D. E. , Heymsfield , A. J. , Ra-manathan , V. and Welton , E . 2000 . Reduction of tropical cloudiness by soot . Science 288 , 1042 – 1047 .  

  3. Allen , C. W . 1976 . Astrophysical Quantities 3rd edn . Athlone Press , London .  

  4. Arino , O. and Molinette , J.-M . 1998 . The 1993 Africa Fire Map, cover page . Int. J. Remote Sens . 19 , 2019 – 2023 .  

  5. Barkstrom , B. and Smith , G . 1986 . The Earth radiation budget ex-periment - science and implementation . Rev. Geophys . 24 , 379 – 390 .  

  6. Blanchet , J.-P . 1989 . Toward an estimation of climatic effects due to Arctic aerosols . Atmos. Environ . 23 , 2609 – 2625 .  

  7. Boucher , O. and Anderson , T. L . 1995 . General circulation model as-sessment of the sensitivity of direct climate forcing by anthropogenic sulfate aerosols to aerosol size and chemistry . J. Geophys. Res . 100 , 26 117-26 134 .  

  8. Brock , C. A. , Radke , L. F. , Lyons , J. H. and Hobbs , P. V . 1989 . Arctic hazes in summer over Greenland and the North American Arctic. I. Incidence and origins . J. Atmos. Chem . 9 , 129 – 148 .  

  9. Charlson , R. J. , Langner , J. , Rodhe , H. , Leovt , C. and Warren , S . 1991. Perturbation of the Northern Hemisphere radiative balance by backscattering from anthropogenic sulfate aerosols. Tellus 43AB, 152 – 163  

  10. Charlson , R. J. , Schwartz , S. E. , Hales , J. M. , Cess , R. D. , Coakley , J. A. , Jr. , Hansen , J. E. and Hofmann , D. J . 1992 . Climate forcing by anthropogenic aerosols . Science 255 , 423 – 430 .  

  11. Chin , M. , Jacob , D. J. , Gardner , G. M. , Spiro , P. A. , Foreman-Fowler , M. and Savoie , D. L . 2000 . A global three-dimensional model of tropospheric sulfate . J. Geophys. Res . 101 , 18 667 – 18690 .  

  12. Chin , M. , Ginoux , P. , Kine , S. , Tones , O. , Holben , B. N. , Duncan , B. N. , Martin , R. V. , Logan , J. A. , Higurashi , A. and Nalcajima , T . 2002 . Tropospheric aerosol optical thickness from the GOCART model and comparisons with satellite and Sun photometer measurements. J. At-mos. Sc i . 59 , 461 – 483 .  

  13. Chuang , C. C. , Penner , J. E. , Taylor , K. E. , Grossmann , A. S. and Walton , J. J . 1997 . An assessment of the radiative effects of anthropogenic sulfate . J. Geophys. Res . 102 , 3761 – 3778 .  

  14. Coakley , A. , Jr, and Cess , R . 1985 . The two-stream approximation in ra-diative transfer. Including the angle of the incident radiation. J. Atmos. Sc i . 32 , 409 – 418 .  

  15. Coakley , A. , Jr , Cess , R. D. and Yurevich , E B . 1983 . The effect of tropo-spheric aerosols on the Earth's radiation budget: A parameterization for climate models. J. Atmos. Sc i . 40 , 116 – 138 .  

  16. Cusack , S. , Slingo , A. , Edwards , J. M. and Wild , M . 1998 . The radiative impact of a simple aerosol climatology on the Hadley Center atmo-spheric GCM . Q. J. R. MeteoroL Soc . 124 , 2517 – 2526 .  

  17. D'Almeida , G. A. , Koepke , P. and Shettle , E. P . 1991 . Atmospheric Aerosols: Global Climatology and Radiative Characteristics . Deepak , Hampton , VA , 560 pp .  

  18. DeMore , W. B. , Sander , S. P. , Golden , D. M. , Hampson , R. E , Kurylo , K. J. , Howard , C. J. , Ravishankara , A. R. and Molina , M. J . 1997. Chemical Kinetics and Photochemical Data for Use in Stratospheric Modeling, Evaluation 12, JPL Publ. 97-4, 266 pp.  

  19. Deuze , J. L. , Herman , M. , Goloub , P. , Tanre , D. and Marchand , A . 1999 . Characterization of aerosols over ocean from POLDER/ADEOS1 . Geophys. Res. Lett . 26 , 1421 – 1424 .  

  20. Dickinson , R. , Henderson-Sellers , A. and Kennendy , P . 1993 . Biosphere-Atmosphere Transfer Scheme (BATS) Version le as coupled to the NCAR Community Climate Model . Tech. Note NCARITN-387+STR National Center for Atmospheric Research , Boulder , CO .  

  21. Dulac , F. , Tanre , D. , Bergametti , G. , Buat-Menard , P. , Desbois , M. and Sutton , D . 1992 . Assessment of the African airborne dust over the western Mediterranean Sea using Meteosat data . J. Geophys. Res . 97 , 2489 – 2506 .  

  22. Feichter , J. , Lohmann , U. and Schuh , I . 1997 . The atmospheric sulfur cycle in ECHAM-4 and its impact on the shortwave radiation . Climate Dyn . 13 , 235 – 246 .  

  23. Fouquart , Y. , Bonnel , B. and Ramaswamy , V . 1991 . Intercomparing shortwave radiation codes for climate studies . J. Geophys. Res . 96 , 8955 – 8968 .  

  24. Frolich , C . 1983 . Data on total and spectral solar irradiance . Comments Appl. Opt . 22 , 3928 .  

  25. Griggs , M . 1968 . Absorption coefficients of ozone in the ultraviolet and visible regions . J. Chem. Phys . 49 , 857 – 859 .  

  26. Gong , S. L. , Barrie , L. A. , Blanchet , J.-P. and Spacek , L . 1998 . Modeling size-distributed sea salt aerosols in the atmosphere: An application using Canadian climate models . In: Air Pollution Modeling and Its Applications XII (eds S.-E. Gryning and N. Chaumerliac). Plenum Press , New York .  

  27. Gupta , S.-K. , Ritchey , N. A. , Wilber , A. C. , Whitlock , C. , Gibson , G. G. and Stackhouse , P. W . 1999 . A climatology of surfae radiation budget derived from satellite data . J. Climate 12 , 2691 – 2710 .  

  28. Hale , G. M. and Querry , M. R . 1973 . Optical constants of water in the 200 nm to 200 µ m wavelength region . Appl. Opt . 12 , 555 – 563 .  

  29. Hänel , G . 1976 . The properties of atmospheric aerosol particles as func-tions of the relative humidity at thermodynamic equilibrium with the surrounding moist air . Adv. Geophys . 19 , 73 – 188 .  

  30. Hänel , G. and Zankl , B . 1979 . Aerosol size and relative humidity: Water uptake by mixtures of salts . Tellus 31 , 478 – 486 .  

  31. Hansen , J. , Sato , M. and Ruedy , R . 1997 . Radiative forcing and climate response . J. Geophys. Res . 102 , 6831 – 6864 .  

  32. Hansen , J. , Sato , M. , Lacis , A. , Ruedy , R. , Tegen , I. and Matthews , E . 1998. Climate forcings in the industrial era. Proc. Natl. Acad. Sci., USA 95 , 12753 – 12758.  

  33. Harshvardhan , J . 1993. Aerosol-climate interactions. In: Aerosol-Cloud-Climate Interactions (ed P. Hobbs). Academic, San Diego, CA, 76 – 95  

  34. Harvey , L. D. D . 2000 . Constraining the aerosol radiative forcing and climate sensitivity. An editorial comment . Clim. Change . 44 , 413 – 418 .  

  35. Hatzianastassiou , N. and Vardavas , I . 1999 . Shortwave radiation budget of the Northern Hemisphere using International Satellite Cloud Cli-matology Project and NCEP/NCAR climatological data . J. Geophys. Res . 104 , 24 401-24 421 .  

  36. Hatzianastassiou , N. and Vardavas , I . 2001 . Shortwave radiation bud-get of the Southern Hemisphere using ISCCP C2 and NCEP/NCAR climatological data . J. Climate , 14 , 4319 – 4329 .  

  37. Hatzianastassiou , N. , Cleridou , N. and Vardavas , I . 2001 . Polar cloud climatologies from ISCCP C2 and D2 datasets . J. Climate 14 , 3851 – 3862 .  

  38. Haywood , J. M. and Ramaswamy , V . 1998 . Global sensitivity studies of the direct radiative forcing due to anthropogenic sulfate and black carbon aerosols . J. Geophys. Res . 103 , 6043 – 6058 .  

  39. Haywood , J. M. and Shine , K. P . 1997 . Multi-spectral calculations of the direct radiative forcing by anthropogenic sulfate and fossil-fuel soot aerosols . Q. J. R. MeteoroL Soc . 123 , 1907 – 1930 .  

  40. Haywood , J. M. , Roberts , D. L. , Slingo , A. , Edwards , J. M. and Shine , K. P . 1997 . General circulation model calculations of the direct radia-tive forcing by anthropogenic sulfate and fossil-fuel soot aerosol . J. Climate 10 , 1562 – 1567 .  

  41. Haywood , J. M. , Ramaswamy , V. and Soden , B. J . 1999 . Tropospheric aerosol climate forcing in clear-sky satellite observations over the oceans . Science 283 , 1299 – 1303 .  

  42. Heintzenberg , J. and Leck , C . 1994 . Seasonal variation of the atmo-spheric aerosol near the top of the marine boundary layer over Spits-bergen related to the Arctic sulphur cycle . Tellus 46B , 52 – 67 .  

  43. Heintzenberg , J. , Charlson , R. J. , Clarke , A. D. , Liousse , C. , Ramanathan , V , Shine , K. P. , Wendisch , M. and Helas , G . 1997 . Measurements and modeling of aerosol single scattering albedo: progress, problems, and prospects . Beitr Phys. Atmos . 70 , 249 – 263 .  

  44. Herman , J. R. , Barthia , P. K. , Tones , O. , Hsu , C. , Seftor , C. and Celarier , E . 1997 . Global distributions of UV-absorbing aerosols from Nim-bus7/T'OMS data . J. Geophys. Res . 102 , 16 911-16 923 .  

  45. Hess , M. , Koepke , P. and Schuh , I . 1998 . Optical properties of aerosols and clouds: Te software package OPAC . Bull. Am. MeteoroL Soc . 79 , 831 – 844 .  

  46. Highwood , E. J . 2000 . Effect of cloud inhomogeneity on direct radiative forcing due to aerosols . J. Geophys. Res . 105 , 17 843-17 852 .  

  47. Higurashi , A. , Nalcajima , T. , Holben , B. N. , Smirnov , A. , Frouin , R. and Chatenet , B . 2000 . A study of global aerosol optical climatology with two-channel AVHRR remote sensing . J. Climate 13 , 2011 – 2027 .  

  48. Hobbs , P. V. , Reid , J. S. , Herring , J. D. , Nance , J. D. , Weiss , R. E. , Ross , J. L. , Hegg , D. A. , Ottmar , R. D. and Liousse , C. A . 1997a. Particle and trace-gas measurements in the smoke from prescribed burns of forest products in the Pacific Northwest. In: Biomass Burning and Global Change (ed. J. S. Levine ). MIT Press, Cambridge, MA, 697 – 715  

  49. Hobbs , P. V , Reid , J. S. , Kotchenrither , R. A. , Ferek , R. J. and Weiss , R . 1997b . Direct radiative forcing by smoke from biomass burning . Science 275 , 1776 – 1778 .  

  50. Holben , B. N. and co-authors. 2001. An emerging ground-based aerosol climatology: Aerosol optical depth from AERONET. J. Geophys. Res . 106 , 12067 – 12097.  

  51. Intergovernmental Panel on Climate Change (IPCC) , 2001 . In: Climate Change 2001: The Scientific Basis (eds J . T. Houghton et al). Cam-bridge University Press , New York , 881 pp .  

  52. Jacobson , M. Z . 2001 . Global direct radiative forcing due to multicompo-nent anthropogenic and natural aerosols . J. Geophys. Res . 106 , 1551 – 1568 .  

  53. Jaenicke , R . 1993. Tropospheric aerosols. In: Aerosol-Cloud-Climate Interactions (ed.P. Hobbs). Academic, San Diego, CA, 1 – 31  

  54. Jones , A. , Roberts , D. L. and Slingo , A . 1994 . A climate model study of the indirect radiative forcing by anthropogenic sulfate aerosols . Nature 370 , 450 – 453 .  

  55. Joseph , J. H. , Wiscombe , W. J. and Weinmann , J. A . 1976 . The Delta-Eddington approximation of radiative flux transfer. J. Atmos. Sc i . 33 , 2452 – 2459 .  

  56. Kahle , A. B. and Deirmendjan , D . 1973. The black cloud experiment. Rep. R-1263-ARPA, Rand, Santa Monica, CA.  

  57. Kaufman , Y. J . 1995. Remote Sensing of direct and indirect aerosol forcing. In: Aerosol Forcing of Climate (edsR. J. Charslon and J. Heintzenberg). Dahlem Workshop, Environm. Sci. Res. Report 17. Wiley, Chichester, 297 – 332  

  58. Kaufman , Y. J. , Tanre , D. , Gordon , H. R. , Nalcajima , T. , Lenoble , J. , Frouin , R. , Grassi , H. , Herman , B. M. , King , M. D. and Teillet , P. M . 1997 . Passive remote sensing of tropospheric aerosol and atmospheric correction for the aerosol effect . J. Geophys. Res . 102 , 16 815-16 830 .  

  59. Kaufman , Y. J. , Tanre , D. and Boucher , O . 2002 . A satellite view of aerosols in the climate system . Nature 419 , 215 – 223 .  

  60. Kiehl , J. T. and Briegleb , B. P . 1993 . The relative roles of sulfate aerosols and greenhouse gases in climate forcing . Science 260 , 311 – 314 .  

  61. Kiehl , J. T. , Schneider , T. L. , Rasch , P. J. , Barth , M. C. and Wong , J . 2000 . Radiative forcing due to sulfate aerosols from simulations with the National Center for Atmospheric Research Community Climate Model, Version 3 . J. Geophys. Res . 105 , 1441 – 1457 .  

  62. King , M. D. , Kaufmann , Y. J. , Tanré , D. and Nalcajima , T . 1999 . Remote sensing of tropospheric aerosols from space: Past, present, and future . Bull. Am. MeteoroL Sos . 80 , 2229 – 2259 .  

  63. Koepke , P. , Hess , M. , Schuh , I. and Shettle , E. P . 1997 . Global Aerosol Data Set . Report No 243 , Max-Planck Institut fiir Meteorologie. Ham-burg , Germany , 44 pp .  

  64. Kondratyev , K. Y . 1973 . Radiation Characteristics of the Atmosphere and the Earth's Surface . Amerind , New Delhi .  

  65. Kondratyev , K. Y . 1999 . Climatic Effects of Aerosols and Clouds . Springer , New York , 264 pp .  

  66. Kuhn , M. H . 1989. The role of land ice and snow in climate. In: Un-derstanding Climate Change, Geophys. Monogr Ser, Vol. 52 (eds. A. Berger, R. E. Dickinson, and J. W. Kidson). American Geophysical Union, Washington, DC, 17 – 28  

  67. Langner , J. and Rodhe , H. , 1991 . A global three-dimensional model of the tropospheric sulfur cycle . J. Atmos. Chem . 13 , 225 – 263 .  

  68. Lelieveld , L. and co-authors 2002. Global air pollution crossroads over the Mediterranean. Science 298, 794 – 799.  

  69. Li , Z. and Kou , L . 1998 . The direct radiative effect of smoke aerosols on atmospheric absorption of visible sunlight . Tellus 50B , 543 – 554 .  

  70. Li , X. , Maring , H. , Savoie , D. , Voss , K. and Prospero , J. M . 1996 . Dom-inance of mineral dust in aerosol light-scattering in the North Atlantic trade winds . Nature 380 , 416 – 419 .  

  71. Liou , K. N . 1992 . Radiation and Cloud Processes in the Atmosphere, Theory, Observation and Modelling . Oxford University Press , New York , 487 pp .  

  72. Liousse , C. , Penner , J. E. , Chuang , C. , Walton , J. J. , Eddleman , H. and Cachier , H . 1996 . A global three-dimensional model study of carbona-ceous aerosols . J. Geophys. Res . 101 , 19 411-19 432 .  

  73. Miller , R. L. and Tegen , I . 1998 . Climate response to soil dust aerosols . J. Climate 11 , 3247 – 3267 .  

  74. Morcrette , J.-J . 2002 . The surface downward longwave radiation in the ECMWF forecast system . J. Climate 15 , 1875 – 1992 .  

  75. Myhre , G. , Stordal , F. , Restad , K. and Isalcsen , I. S. A . 1998 . Estimation of the direct radiative forcing due to sulfate and soot aerosols . Tellus , 50B , 463 – 477 .  

  76. Penner , J. E. , Dickinson , R. E. and O'Neill , C. A . 1992 . Effects of aerosols from biomass burning on the global radiation budget . Sci-ence 256 , 1432 – 1433 .  

  77. Penner , J. E. , Chuang , C. C. and Grant , K . 1998 . Climate forcing by carbonaceous and sulfate aerosols . Climate. Dyn . 14 , 839 – 851 .  

  78. Penner , J. E. , Zhang , S. Y. , Chin , M. , Chuang , C. C. , Feichter , J. , Feng , Y. , Georgdzhayev , I. V. , Ginoux , P. , Herzog , M. , Higurashi , A. , Koch , D. , Land , C. , Lohmann , U. , Mischenlco , M. , Nalcajima , T. , Pitari , G. , Soden , B. , Tegen , I. and Stowe , L . 2002 . A comparison of model and satellite-derived aerosol optical depth and reflectivity. J. Atmos. Sc i . 59 , 441 – 460 .  

  79. Podgorny , I. A. , Conant , W. , Ramanathan , V. and Satheesh , S. K . 2000 . Aerosol modulation of atmospheric and surface solar heating over the tropical Indian Ocean . Tellus 52B , 947 – 958 .  

  80. Pruppacher , H. R. and Klett , J. D . 1997 . Microphysics of Clouds and Precipitation, 2nd revised and enlarged edn with an introduction to cloud chemistry and cloud electricity . Kluwer , Dordrecht , 954 pp .  

  81. Ramanathan , V , Crutzen , P. J. , Kiehl , J. T. and Rosenfeld , D . 2001 . Aerosols, climate, and the hydrological cycle . Science , 294 , 2119 – 2124 .  

  82. Roeckner , E. , Siebert , T. and Feichter , J . 1995 . Climatic response to anthropogenic sulfate forcing simulated with a general circula-tion model . In: Aerosol Forcing of Climate (eds R. Charlson and J. Heintzenerg). Wiley , New York , 349 – 362 .  

  83. Roesch , A. , Wild , M. , Pinker , R. and Ohmura , A . 2002. Comparison of surface spectral albedos and their impact on the general circula-tion model estimated surface climate. J. Geophys. Res . 107 , D14, doi https://doi.org/10.1029/2001JD000809 , ACL 13-1-13–8  

  84. Rossow , W. B. and Schiffer , R. A . 1999 . Advances in understanding clouds from ISCCP . Bull. Am. MeteoroL Soc . 80 , 2261 – 2287 .  

  85. Rossow , W. B. , Walker , A. W. , Beuschel , D. E. and Roiter , M. D . 1996 . In-ternational Satellite Cloud Climatology Project (ISCCP) . Documen-tation of New Cloud Datasets. World Meteorological Organization , Geneva , 115 pp .  

  86. Schwartz , S. E . 1996 . The whitehouse effect - shortwave radiative forc-ing of climate by anthropogenic aerosols. An overview. J. Aerosol Sc i . 72 , 469 – 477 .  

  87. Shaw , G. E. , Stamnes , K. and Hu , Y. X . 1993 . Arctic haze: perturbation to the radiation field . MeteoroL Atmos. Phys . 51 , 227 – 235 .  

  88. Schult , I. , Feichter , J. and Cooke , W. F . 1997 . Effect of black carbon and sulfate aerosols on the global radiation budget . J. Geophys. Res . 102 , 30 107-30 117 .  

  89. Shettle , E. P. and Weinmann , J. A . 1970 . The transfer of solar irradiance through inhomogeneous turbid atmospheres evaluated by Eddington's approximation. J. Atmos. Sc i . 27 , 1048 – 1055 .  

  90. Sokolilc , I. N. and Toon , O. B . 1996 . Direct radiative forcing by anthro-pogenic airborne mineral aerosol . Nature 381 , 681 – 683 .  

  91. Stenchikov , G. L. , Kirchner , I. , Robock , A. , Graf , H.-F. , Antuna , J. C. , Greinger , R. G. , Lambert , A. and Thomason , L . 1998 . Radiative forc-ing from the 1991 Mount Pinatubo volcanic eruption . J. Geophys. Res . 103 , 13 837-13 857 .  

  92. Swap , R. , Garstang , M. , Greco , S. , Talbot , R. and Kallberg , P . 1992 . Saharan dust in Amazon basin . Tellus 44B , 133 – 149 .  

  93. Takemura , T. , Okamoto , H. , Murayama , Y. , Numaguti , A. , Higurashi , A. and Nalcajima , T . 2000 . Global three-dimensional simulation of aerosol optical thickness distribution of various origins . J. Geophys. Res . 105 , 17 853-17 873 .  

  94. Takemura , T. , Nalcajima , H. T. , Dubovilc , O. , Holben , B. N. and Kinne , S . 2002 . Single-scattering albedo and radiative forcing of various aerosol species with a global three-dimensional model . J. Climate 15 , 333 – 352 .  

  95. Taylor , K. E. and Penner , J. E . 1994 . Response of the climate system to atmospheric aerosols and greenhouse gases . Nature 369 , 734 – 737 .  

  96. Tegen , I. , Lacis , A. A. and Fung , I . 1996 . The influence on climate forcing of mineral aerosols from disturbed soils . Nature 380 , 419 – 422 .  

  97. Tegen , I. , Hollrigl , P. , Chin , M. , Fung , I. , Jacob , D. and Penner , J. E . 1997 . Contribution of different aerosol species to the global aerosol extinction optical thickness: estimates from model results . J. Geophys. Res . 102 , 23 895-23 915 .  

  98. Tegen , I. , Koch , D. , Lacis , A. A. and Sato , M . 2000 . Trends in tropo-spheric aerosol loads and corresponding impact on direct radiative forcing between 1950 and 1990: a model study . J. Geophys. Res . 105 , 26 971-26 989 .  

  99. Thekaekara , M. P. and Drummond , A. J . 1971 . Standard values for the solar constant and its spectral components . Nature Phys. Sc i . 229 , 6 – 9 .  

  100. Torres , O. , Barthia , P. K. , Herman , J. R. , Sinyuk , A. , Ginoux , R. and Holben , B . 2002 . A long-term record of aerosol optical depth from TOMS observations and comparison to AERONET measurements. J. Atmos. Sc i . 59 , 398 – 413 .  

  101. Twomey , S . 1974 . Pollution and planetary albedo . Atmos. Environ . 8 , 1251 – 1256 .  

  102. Vardavas , I. and Carver , J. H . 1984 . Solar and terrestrial parameteriza-dons for radiative convective models. Planet . Space Sc i . 32 , 1307 – 1325 .  

  103. Vitale , V , Tomasi , C. , Lupi , A. , Cacciari , A. and Marani , S . 2000 . Retrieval of columar aerosol size distributions and radiative-forcing evaluations from sun-photometric measurements taken during the CLEARCOLUMN (ACE 2) experiment . Atmos. En v . 34 , 5095 – 5105 .  

  104. Wild , M , 1999 . Discrepancies between model-calculated and observed shortwave atmospheric absorption in areas with high aerosol loadings . J. Geophys. Res . 104 , 27 361-27 371 .  

  105. Zhang , J. , Liu , S. M. , Lii , C. and Huang , W. W . 1993 . Characterizing Asian wind-dust transport to the Northwest Pacific Ocean. Direct mea-surements of the dust flux for two years . Tellus 45B , 335 – 345 .  

  106. Zhang , Y.-C. , Rossow , W. B. and Lacis , A. A . 1995 . Calculation of surface and top of atmosphere radiative fluxes from physical quantities based on ISCCP data sets, 1. Method and sensitivity to input data uncertainties . J. Geophys. Res . 100 , 1149 – 1165 .  

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