Babu, Suresh S and Satheesh, SK and Moorthy, Krishna K (2002) Aerosol radiative forcing due to enhanced black carbon at an urban site in India. In: Geophysical Research Letters, 29 (18). p. 1880.
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Abstract
[1] During a comprehensive aerosol field campaign, simultaneous measurements were made of aerosol spectral optical depths, black carbon mass concentration (M-b), total (M-t) and size segregated aerosol mass concentrations over an urban continental location, Bangalore (13 degreesN, 77 degreesE, 960 m msl), in India. Large amounts of BC were observed; both in absolute terms and fraction of total mass (similar to11%) and submicron mass (similar to23%) implying a significantly low single scatter albedo. The aerosol visible optical depth (tau(p)) was in the range 0.24 to 0.45. Estimated surface forcing is as high as -23 W m(-2) and top of the atmosphere (TOA) forcing is +5 Wm(-2) during relatively cleaner periods (tau(p) similar to 0.24). The net atmospheric absorption translates to an atmospheric heating of similar to0.8 K day(-1) for cleaner periods and similar to1.5 K day(-1) for less cleaner periods (tau(p) similar to 0.45). Our observations raise several issues, which may have impacts to regional climate and monsoon.
Item Type: | Journal Article |
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Publication: | Geophysical Research Letters |
Publisher: | American Geophysical Union |
Additional Information: | Copyright of this article belongs to American Geophysical Union. |
Department/Centre: | Division of Mechanical Sciences > Centre for Atmospheric & Oceanic Sciences |
Date Deposited: | 04 Aug 2011 06:10 |
Last Modified: | 04 Aug 2011 06:10 |
URI: | http://eprints.iisc.ac.in/id/eprint/38936 |
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