@article {5007,
	title = {Identification of aerosol type over the Arabian Sea in the premonsoon season during the Integrated Campaign for Aerosols, Gases and Radiation Budget (ICARB)},
	journal = {Journal of Geophysical Research Atmospheres},
	volume = {114},
	year = {2009},
	note = {Cited By :35Export Date: 2 November 2015Correspondence Address: Kalapureddy, M. C. R.; Physical Meteorology and Aerology Division, Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, Dr. Homi Bhabha Road, Pune 411008, India; email: kalapureddy1@gmail.comReferences: Alappattu, D.P., Subrahamanyam, B.D., Kunhikrishnan, P.K., Somayaji, K.M., Bhat, G.S., Venkatesan, R., Dutt, C.B.S., Tripathi, A.S., On the maritime atmospheric boundary layer characteristics over Bay of Bengal and Arabian Sea during the Integrated Campaign for Aerosols, gases and Radiation Budget (ICARB) (2008) J. Earth Syst. Sci., 117, pp. 281-291. , doi:10.1007/s12040- 008-0031-40;{\r A}ngstr{\"o}m, A.K., On the atmospheric transmission of Sun radiation and on dust in the air (1929) Geogr. Ann., 11, pp. 156-166; 
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},
	month = {2009},
	publisher = {Blackwell Publishing Ltd},
	abstract = {A discrimination of the different aerosol types over the Arabian Sea (AS) during the Integrated Campaign for Aerosols, Gases and Radiation Budget (ICARB-06) is made using values of aerosol optical depth (AOD) at 500 nm (AOD<inf>500</inf>) and {\r A}ngstr{\"o}m exponent (α) in the spectral band 340-1020 nm (α<inf>340-1020</inf>). For this purpose, appropriate thresholds for AOD<inf>500</inf> and α<inf>340-1020</inf> are applied. It is shown that a single aerosol type in a given location over the AS can exist only under specific conditions while the presence of mixed aerosols is the usual situation. Analysis indicates that the dominant aerosol types change significantly in the different regions (coastal, middle, and far) of AS. Thus the urban/industrial aerosols are mainly observed in coastal AS, the desert dust particles occur in the middle and northern AS, while clear maritime conditions mainly occur in far AS. Spectral AOD and {\r A}ngstr{\"o}m exponent data were analyzed to obtain information about the adequacy of the simple use of the {\r A}ngstr{\"o}m exponent and spectral variation of a for characterizing the aerosols. Using the least squares method, α is calculated in the spectral interval 340-1020 nm along with the coefficients a<inf>1</inf> and a<inf>2</inf> of the second-order polynomial fit to the plotted logarithm of AOD versus the logarithm of wavelength. The results show that the spectral curvature can effectively be used as a tool for their discrimination, since the fine mode aerosols exhibit negative curvature, while the coarse mode particles exhibit positive curvature. The correlation between the coefficients a<inf>1</inf> and a<inf>2</inf> with the {\r A}ngstr{\"o}m exponent, and the atmospheric turbidity, is further investigated. Copyright 2009 by the American Geophysical Union.},
	keywords = {aerosol composition, Aerosol optical depths, aerosol property, Aerosol types, Algebra, Arabian Sea, Atmospheric aerosols, Atmospheric turbidity, Budget control, Coarse mode particles, Desert dust, dust, Indian Ocean, integrated approach, Least squares methods, marine atmosphere, Negative curvature, Pre-monsoon, Radiation budget, Second-order polynomial, spectral analysis, Spectral band, Spectral variation, Turbidity, wavelength},
	isbn = {01480227 (ISSN)},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-72049109726\&partnerID=40\&md5=ab4209b38d5615c9480a3d9ab53d0a31},
	author = {Kalapureddy, M. C. R. and Kaskaoutis, D. G. and Ernest Raj, P. and Devara, P. C. S. and Kambezidis, H. D. and Kosmopoulos, P. G. and Nastos, P. T.}
}
