DOI: 10.1016/j.atmosenv.2013.11.029
Scopus记录号: 2-s2.0-84890710034
论文题名: Physical and optical properties of aerosols in a free tropospheric environment: Results from long-term observations over western trans-Himalayas
作者: Gogoi M ; M ; , Moorthy K ; K ; , Kompalli S ; K ; , Chaubey J ; P ; , Babu S ; S ; , Manoj M ; R ; , Nair V ; S ; , Prabhu T ; P
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 84 起始页码: 262
结束页码: 274
语种: 英语
英文关键词: Aerosol optical depth
; Black carbon
; Himalayan aerosols
; Number concentration
; Size distribution
Scopus关键词: Atmospheric aerosols
; Size distribution
; Aerosol optical depths
; Black carbon
; Extinction coefficients
; Meteorological parameters
; Number concentration
; Number size distribution
; Optical properties of aerosols
; Total number concentrations
; Atmospheric movements
; black carbon
; aerosol composition
; aerosol property
; atmospheric transport
; black carbon
; CALIPSO
; coagulation
; concentration (composition)
; diurnal variation
; extinction coefficient
; optical depth
; physical property
; size distribution
; troposphere
; advection
; aerosol
; article
; boundary layer
; concentration (parameters)
; humidity
; observational study
; optical depth
; priority journal
; seasonal variation
; spring
; summer
; surface property
; troposphere
; winter
; China
; Gangdise Mountains
; Xizang
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: Simultaneous and collocated estimates of near-surface mass concentration of black carbon (BC), number size distribution (NSD) and total number concentration (NT) of composite aerosols, columnar spectral aerosol optical depth (AOD) and local meteorological parameters were made from Aug 2009 to July 2012 at the high altitude (4520m amsl), remote location Hanle in western trans-Himalayas. Even though all the aerosol parameters remain quite low, large annual variations are seen in the monthly mean values of BC (25ngm-3-181ngm-3), total number concentrations of composite aerosols (628cm-3-1500cm-3) and AOD (0.05-0.16). Size segregated correlation analysis reveals that the BC mass contributes significantly to the size range of 200-400nm of the submicron aerosol size spectra. The diurnal variation of BC mostly has been dampened; yet seems to be prominent during spring, showing the presence of weak boundary layer dynamics. In contrast, the diurnal fluctuations in total number concentration have been mostly controlled by the new particle formation events, leading to bursts of large concentrations of ultrafine particles, which subsequently undergo coagulation. Spectral dependence of AOD also shows large monthly variations, with the Angstrom exponent varying from ~0.52 to 1.3, with a mean value of ~0.95±0.21. The vertical distribution of extinction coefficients, obtained from CALIPSO data, indicates the presence of elevated aerosol layers, attributed mainly to the influence of long range transport of aerosols from the west Asian and Indian desert region. © 2013 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81084
Appears in Collections: 气候变化事实与影响
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作者单位: Space Physics Laboratory, Vikram Sarabhai Space Centre, Indian Space Research Organization, Trivandrum 695022, India; Indian Institute of Astrophysics, Bangalore 560034, India
Recommended Citation:
Gogoi M,M,, Moorthy K,et al. Physical and optical properties of aerosols in a free tropospheric environment: Results from long-term observations over western trans-Himalayas[J]. Atmospheric Environment,2014-01-01,84