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Aerosols over Delhi during pre‐monsoon months: Characteristics and effects on surface radiation forcing
Author(s) -
Singh Sachchidanand,
Nath Shambhu,
Kohli Ramesh,
Singh Risal
Publication year - 2005
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2005gl023062
Subject(s) - aerosol , single scattering albedo , environmental science , atmospheric sciences , albedo (alchemy) , angstrom exponent , radiative forcing , forcing (mathematics) , monsoon , wavelength , radiative transfer , climatology , meteorology , physics , geology , optics , art , performance art , art history
The surface fluxes in the wavelength range 280–2800 nm were measured during the pre‐monsoon period, April–June 2003 along with the spectral distribution of aerosol optical depth (AOD) in the visible and near infrared wavelengths. The Ångström exponent alpha retrieved from the data showed abundance of desert aerosols over Delhi during this period. The aerosol composition constructed using the OPAC model indicated a typical mixture of two aerosol types: urban and desert. Due to this the aerosol mixture had a very low value of single scattering albedo ∼0.67. The average total radiative forcing efficiency observed at the surface in the broad wavelength band (280–2800 nm) was estimated and compared with the SBDART model calculated values.