Aerosol characteristics over coastal regions of the Arabian Sea

S. K. Satheesh; K. Krishna Moorthy

doi:10.3402/tellusb.v49i4.15979

Aerosol characteristics over coastal regions of the Arabian Sea

Tellus B: Chemical and Physical Meteorology

Volume 49 (1997): Issue 4

By: S. K. Satheesh and K. Krishna Moorthy

Open Access

|Jan 1997

Abstract

From aerosol spectral optical depths (τ_pλ) at 10 wavelengths in the range 380 to 1025 nm estimated at different locations in the near and far coastal regions of the Arabian sea adjoining the western coast of central India, the spatial and spectral characteristics of coastal aerosols and the effect of the proximity to the (urban) continent are investigated. The Ångström parameters are deduced from τ_p _λ values. A significant increase, both in aerosol optical depths at shorter (visible) wavelengths (λ≤ 600 nm) and the Ångström wavelength exponent are observed in the near coastal regions, suggesting an increase in the (relative) concentration of sub micron particles, apparently of anthropogenic origin. The Ångström turbidity coefficient remains nearly steady spatially, indicating a (spatially) uniform loading of large particles.

References

Ångström , A . 1961 . Techniques of determining the turbidity of the atmosphere . Tellus 13 , 214 – 223 .
Search in Google Scholar Back to article
Ångström , A . 1964 . The parameters of atmospheric turbidity . Tellus 16 , 64 – 75 .
Search in Google Scholar Back to article
Blanchard , D. C. and Woodcock A. H . 1980 . The produc-tion, concentration and vertical distribution of the sea-salt aerosol . Ann. of the N. Y. Academy of Sciences 338 , 330 – 347 .
Search in Google Scholar Back to article
Charlson , R. J. , Lovelock , J. E. , Andreae , M. O. and Warren , S. G . 1987 . Oceanic phytoplankton, atmospheric sulfur, cloud albedo and climate . Nature 326 , 655 – 661 .
Search in Google Scholar Back to article
CharIson , R. J. and Heintzenberg , J . 1995 . Aerosol forcing of climate John Wiley & Sons , New York , 416pp .
Search in Google Scholar Back to article
Das , P. K . 1986 . Monsoons , 5th IMO Lecture. WMO-No.613 , World Meteorological Organization , Ganeva, Switzerland, pp . 29 - 55 .
Search in Google Scholar Back to article
Exton , A. J. , Latham J. , Park P. M. , Perry S. J. and Smith M. H . 1985 . The production and dispersal of marine aerosol . Q. J. Roy. Meteorol. Soc . 111 , 817 – 837 .
Search in Google Scholar Back to article
Fisher , R. A . 1970 . Statistical methods for research works . Oliver & Boyd , Edinburgh .
Search in Google Scholar Back to article
Fitzgerald , J. W . 1991. Marine Aerosols-A review. Atmos. Environ. 25(A), 533 – 545.
Search in Google Scholar Back to article
Hoppel , W. A. , Fitzgerald , J. W. , Frick , G. M. , Larson , R. E. and Mack , E. J . 1989 . Atmospheric aerosol size distributions and optical properties found in the Marine boundary layer over the Atlantic Ocean. NRL Report 9188 , Washington DC , USA , pp 1 – 75 .
Search in Google Scholar Back to article
Hoppel , W. A. , Fitzgerald , J. W. , Frick G. M. and Larsen , R. E . 1990 . Aerosol size distributions and optical prop-erties found in the marine boundary layer over the Atlantic ocean . J. Geophys. Res . 95 3659 – 3686 .
Search in Google Scholar Back to article
Hoppel. W. A. , Frick , G. M. , Fitzgerald , J. W. and Larson , R. E . 1994 . Marine boundary layer measure-ments of a new particle formation and the effects of non-precipitating clouds have on aerosol size distribu-tion . .1. Geophys. Res . 99 , 14 , 443-14 , 459 .
Search in Google Scholar Back to article
Junge , C. E . 1952. Gesetzmafligkeiten in der Greiflenverteilumg atmosphtirischer Aerosol fiber dem Kontinent. Report 35 Deutscher Wetterdienst in der US-Zone, pp 261 – 277.
Search in Google Scholar Back to article
Junge , C. E . 1963 . Air chemistry and Radioactivity . Aca-demic Press Inc ., New York , USA , pp 111 – 208 .
Search in Google Scholar Back to article
Junge , C. E . 1972 . Our knowledge of the physico-chemistry of aerosols in the undisturbed marine envir-onments . J. Geophys. Res . 77 , 5183 – 5200 .
Search in Google Scholar Back to article
Kleinbaum , D.G and Kupper , L. L. 1978. Applied regres-sion analysis and other multi-variable methods. Dux-burg, Boston, 49 pp.
Search in Google Scholar Back to article
Leckner , B . 1978 . The spectral distribution of solar radi-ation at the earth's surface-elements of a model . Sol. Energy 20 , 143 – 150 .
Search in Google Scholar Back to article
Mani , A. , Chacko , O. and Hariharan , S . 1969 . A study of Ångström's turbidity parameters from solar radi-ation measurements in India . Tellus 21 , 829 – 843 .
Search in Google Scholar Back to article
Moorthy , K. K. , Nair , P. R. and Krishna Murthy , B. V . 1989 . Multiwavelength solar radio meter network and features of aerosol spectral optical depth at Trivand-rum . Ind. J. Radio Space Phys . 18 , 194 – 201 .
Search in Google Scholar Back to article
Moorthy , K. K. , Nair , P. R. , Krishna Murthy B. V. and Satheesh , S. K . 1996 . Time evolution of the optical effects and aerosol characteristics of Mt.Pinatubo origin from ground based observations . J. Atmos. Terr. Phys . 58 , 1101 – 1116 .
Search in Google Scholar Back to article
Peterson , J. T. and Junge , C. E . 1971. Sources of partic-ulate matter in the atmosphere. In: Man's impact on the climate, ed. W. H. Mathews, W. W. Kellog and G. D. Robinson. MIT Press , Cambridge, Mass. , pp 310 – 320.
Search in Google Scholar Back to article
Prospero , J. M . 1979 . Mineral and sea-salt aerosol concentrations in various ocean regions . J. Geophys. Res . 84 , 725 – 731 .
Search in Google Scholar Back to article
Prospero , J. M. , Charlson , R. J. , Mohnen , V. , Jaenicke , R. , Delany , A. C. , Moyers, J. Zoller W. and Rahn , K . 1983 . The atmospheric aerosol system. An overview . Rev. of Geophys. and Space Phys . 21 , 1607 – 1629 .
Search in Google Scholar Back to article
Pruppacher , H. R. and Klett , J. D . 1978. Microphysics of clouds and precipitation. D. Reidel Publishing Co., Hingham, Masschusetts, USA, pp 364 – 371.
Search in Google Scholar Back to article
Rao , Y. P . 1976. South West Monsoon. Meteorol. Mono-graph Synoptic Meteorology, No.1/1976, IMD, New Delhi, India.
Search in Google Scholar Back to article
Russell , P. B. , Livingston , J. M. , Dutton , E. G. , Pueschel , R. F. , Reagon , J. A. , Defoor , T. E. , Box , M. A. , Allen , D. , Pilewskie , P. , Herman , B. M. , Kinnie , S. A. and Hofmann , D. J . 1993 . Pinatubo and Pre-Pinatubo optical depth spectra: Mauna Loa measurements, comparisons, inferred particle size distribution, radiat-ive effects and relationship to Lidar data . J. Geophys. Res . 98 , 22 , 969-22 , 985 .
Search in Google Scholar Back to article
Satheesh , S. K. and Moorthy , K. K . 1996 . Atmospheric total ozone content from spectral extinction measure-ments . Ind. J. Radio Space Phys . 25 , 204 – 210 .
Search in Google Scholar Back to article
Shaw , G. E . 1976 . Error analysis of multiwavelength sun photometry . Pure. Appl. Geophys . 114 , 1 – 14 .
Search in Google Scholar Back to article
Shaw , G. E. , Reagan , J. A. and Herman , B. M . 1973 . Investigations of atmospheric extinction using direct solar radiation measurements made with a multiple wavelength radiometer . J. Appl. Meteorol . 12 , 374 – 380 .
Search in Google Scholar Back to article
Shirvaikar , V. V. , Sitaraman , V. and Sastry P. L. K . 1976 . A study of the wavelength exponent of aerosol scattering using Volz sun photometer . Tellus 4 , 373 – 376 .
Search in Google Scholar Back to article
Tomasi , C. , Caroli , E. and Vitale , V . 1983 . Study of the relationship between Angstrom's wavelength exponent and Junge's particle size distribution exponent . J. Climate and Appl. Meteorol . 22 , 1707 – 1715 .
Search in Google Scholar Back to article

Articles in this issue

DOI: https://doi.org/10.3402/tellusb.v49i4.15979 | Journal eISSN: 1600-0889

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Language: English

Page range: 417 - 428

Submitted on: Jan 28, 1997

Accepted on: May 5, 1997

Published on: Jan 1, 1997

Published by: Stockholm University Press

In partnership with: Paradigm Publishing Services

© 1997 S. K. Satheesh, K. Krishna Moorthy, published by Stockholm University Press
This work is licensed under the Creative Commons Attribution 4.0 License.

Volume 49 (1997): Issue 4