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Observations of Black Carbon characteristics and radiative forcing over a Global Atmosphere Watch supersite in Korea

Panicker, AS and Park, SH and Lee, DI and Kim, DC and Jung, WS and Jang, SM and Jeong, JH and Kim, DS and Yu, J and Jeong, H (2013) Observations of Black Carbon characteristics and radiative forcing over a Global Atmosphere Watch supersite in Korea. Atmospheric Environment, 77. pp. 98-104.

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This paper provides an account of observed variations in Black carbon (BC) mass concentrations and BC induced radiative forcing for the first time over a background Global Atmosphere Watch (GAW) site, Anmyeon in South Korea. BC concentrations were continuously measured over the site during January 2003-December 2004 periods using an Aethalometer. BC showed higher concentrations during 2003 in majority of the months (except in January, August and October). BC found to be showing higher concentrations in September 2003, with values reaching up to 3μgm-3 over the site. It also showed higher peaks in May and December in 2003. BC values were found to be comparatively less during wet season (July-August; especially august), which could be associated with the rainout and washout associated with the Changma season (summer monsoon). Optical Properties of Aerosols and Clouds (OPAC) model in combination with a radiative transfer model (SBDART) were used to estimate aerosol radiative forcing separately for composite aerosols (total aerosols) and solely for BC aerosols using chemical composition data sets of Total Suspended Particulates (TSP) and BC. The atmospheric forcing for composite aerosols found to be+14.9 to+25.9Wm-2 during spring,+13.4 to+20.4Wm-2 in summer,+12.9 to+19.1Wm-2 in autumn and+16 to+18.2Wm-2 during winter,respectively. The respective BC atmospheric forcings were+8.1 to+11.8Wm-2,+8.4 to+11.1Wm-2,+8.7 to+11.4Wm-2 and+8.8 to+11.7Wm-2 during spring, summer, autumn and winter. The study suggests that BC induced atmospheric forcing can contribute up to 88 of total aerosol induced atmospheric warming.

Item Type: Article
Additional Information: Copyrights of this article belongs to Elsevier.
Uncontrolled Keywords: Aerosol optical depths; Aerosol radiative forcing; Black carbon; Chemical composition data; Global atmosphere watches; Optical properties of aerosols; Radiative forcings; Total suspended particulates, Atmospheric radiation; Optical properties; Watches, Atmospheric aerosols, black carbon, aerosol property; air temperature; atmospheric forcing; black carbon; concentration (composition); optical depth; radiative forcing; suspended particulate matter; warming; weather station, aerosol; Aethalometer; analytical equipment; article; atmosphere; atmospheric radioactivity; atmospheric transport; autumn; chemical composition; concentration (parameters); controlled study; greenhouse effect; molecular weight; priority journal; seasonal variation; soot; South Korea; spring; summer; suspended particulate matter; total suspended particulate matter; winter, Anmyeon Island; South Chungcheong; South Korea
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 20 Jun 2014 06:24
Last Modified: 20 Jun 2014 06:24

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