Radiative effect of springtime biomass-burning aerosols over northern indochina during 7-SEAS/BASELInE 2013 campaign

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Title:	Radiative effect of springtime biomass-burning aerosols over northern indochina during 7-SEAS/BASELInE 2013 campaign
Authors:	王聖翔;Pani, Shantanu Kumar;Wang, Sheng-Hsiang;Lin, Neng-Huei;Lee, Chung-Te;Tsay, Si-Chee;Holben, Brent N.;Janjai, Serm;Hsiao, Ta-Chih;Chuang, Ming-Tung;Chantara, Somporn
Contributors:	地球科學學院大氣科學學系
Keywords:	Earth Resources And Remote Sensing
Date:	2016-11-01
Issue Date:	2026-04-21 14:18:57 (UTC+8)
Publisher:	AAGR Aerosol and Air Quality Research;Goddard Space Flight Center: Taiwan Association for Aerosol Research (TAAR)
Abstract:	摘要： The direct aerosol radiative effects of biomass-burning (BB) aerosols over northern Indochina were estimated by using aerosol properties (physical, chemical, and optical) along with the vertical profile measurements from ground-based measurements with integration of an optical and a radiative transfer model during the Seven South East Asian Studies Biomass-Burning Aerosols Stratocumulus Environment: Lifecycles Interactions Experiment (7-SEASBASELInE) conducted in spring 2013. Cluster analysis of backward trajectories showed the air masses arriving at mountainous background site (Doi Ang Khang; 19.93degN, 99.05degE, 1536 m above mean sea level) in northern Indochina, mainly from near-source inland BB activities and being confined in the planetary boundary layer. The PM(sub10) and black carbon (BC)mass were 87 +/- 28 and 7 +/- 2 micrograms m(exp -3), respectively. The aerosol optical depth (AOD (sub 500) was found to be 0.26--1.13 (0.71 +/- 0.24). Finer (fine mode fraction is approximately or equal to 0.95, angstrom-exponent at 440-870 nm is approximately or equal to 1.77) and significantly absorbing aerosols(single scattering albedo is approximately or equal to 0.89, asymmetry-parameter is approximately or equal to 0.67, and absorption AOD 0.1 at 440 nm) dominated over this region. BB aerosols (water soluble and BC) were the main contributor to the aerosol radiative forcing (ARF), while others (water insoluble, sea salt and mineral dust) were negligible mainly due to their low extinction efficiency. BC contributed only 6 to the surface aerosol mass but its contribution to AOD was 12 (2 times higher). The overall mean ARF was 8.0 and -31.4 W m(exp -2) at top-of-atmosphere (TOA) and at the surface (SFC), respectively. Likely, ARF due to BC was +10.7 and -18.1 W m(exp -2) at TOA and SFC, respectively. BC imposed the heating rate of +1.4 K d(exp -1) within the atmosphere and highlighting its pivotal role in modifying the radiation budget. We propose that to upgrade our knowledge on BB aerosol radiative effects in BB source region, the long-term and extensive field measurements are needed. 其他題名： Aerosol Air Qual. Res 出版者： Goddard Space Flight Center: Taiwan Association for Aerosol Research (TAAR) 出版日期： 2016-11-01 出處： Aerosol and air quality research, 2016-11, Vol.16 (11), p.2802-2817 資源來源： NASA Technical Reports Server 版權： Taiwan Association for Aerosol Research 2016 識別號： ISSN: 1680-8584 識別號： ISSN: 2071-1409 識別號： EISSN: 2071-1409 識別號： DOI: 10.4209/aaqr.2016.03.0130
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