DOI: 10.1016/j.atmosenv.2014.03.030
Scopus记录号: 2-s2.0-84897906940
论文题名: Brown carbon in atmospheric outflow from the Indo-Gangetic Plain: Mass absorption efficiency and temporal variability
作者: Srinivas B ; , Sarin M ; M
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 89 起始页码: 835
结束页码: 843
语种: 英语
英文关键词: Bay of bengal
; Biomass burning emissions
; Brown carbon
; Indo-Gangetic plain
; Mass absorption efficiency
Scopus关键词: Atmospheric aerosols
; Atmospheric radiation
; Efficiency
; Bay of Bengal
; Biomass burning emissions
; Brown carbons
; Indo-Gangetic Plains
; Mass absorption
; Carbon
; brown carbon
; carbon
; organic carbon
; unclassified drug
; absorption coefficient
; aerosol composition
; anthropogenic source
; atmospheric transport
; biomass burning
; carbon
; concentration (composition)
; marine atmosphere
; outflow
; radiative forcing
; absorption
; aerosol
; article
; atmosphere
; biomass
; controlled study
; light absorption
; particulate matter
; priority journal
; radiative forcing
; secondary organic aerosol
; solar radiation
; total organic carbon
; water absorption
; Bay of Bengal
; Gangetic Plain
; Indian Ocean
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: The simultaneous measurements of brown carbon (BrC) and elemental carbon (EC) are made in ambient aerosols (PM2.5), collected from a site in north-east India during November'09-March'10, representing the atmospheric outflow from the Indo-Gangetic Plain (IGP) to the Bay of Bengal (BoB). The absorption coefficient of BrC (babs), assessed from water-soluble organic carbon (WSOC) at 365nm, varies from 2 to 21Mm-1 and exhibits significant linear relationship (P<0.05) with WSOC concentration (3-29μgm-3). The angstrom exponent (α: 8.3±2.6, where babs≈λ-α.) is consistent with that reported for humic-like substances (HULIS) from biomass burning emissions (BBE). The impact of BBE is also discernible from mass ratios of nss-K+/EC (0.2-1.4) and OC/EC (3.4-11.5). The mass fraction of WSOC (10-23%) in PM2.5 and mass absorption efficiency of BrC (σabs-BrC: 0.5-1.2m2g-1) bring to focus the significance of brown carbon in atmospheric radiative forcing due to anthropogenic aerosols over the Indo-Gangetic Plain. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81253
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Physical Research Laboratory, Ahmedabad 380009, India; Institute of Low Temperature Science, Hokkaido University, Sapporo, Japan
Recommended Citation:
Srinivas B,, Sarin M,M. Brown carbon in atmospheric outflow from the Indo-Gangetic Plain: Mass absorption efficiency and temporal variability[J]. Atmospheric Environment,2014-01-01,89