DOI: 10.1002/2016JD025770
论文题名: Dominance of pollutant aerosols over an urban region and its impact on boundary layer temperature profile
作者: Talukdar S. ; Jana S. ; Maitra A.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2017
卷: 122, 期: 2 起始页码: 1001
结束页码: 1014
语种: 英语
英文关键词: boundary layer height
; convective processes
; single-scattering albedo
; temperature lapse rate
; urban pollutants
Scopus关键词: aerosol
; albedo
; black carbon
; boundary layer
; heating
; metropolitan area
; optical depth
; temperature profile
; troposphere
; urban pollution
; urban region
; India
; Kolkata
; West Bengal
英文摘要: Collocated measurements of aerosol optical depth (AOD) and black carbon at different wavelengths over Kolkata, an urban region in eastern India, have been used to calculate aerosol single-scattering albedo (SSA). The wavelength dependence of SSA and AOD has been presented to discriminate the aerosol types over this highly populated metropolitan area. The spectral pattern shows that SSA decreases with wavelength for most of the time in a year and corresponding Ångström coefficient is greater than unity. These optical properties indicate the dominance of fine-mode pollutant particles over the city. The temperature lapse rate profile within the surface boundary layer has been found to be significantly influenced by the heating effect of fine-mode pollutants, and consequently, the growth of the convective processes in the lower troposphere is notably affected. In addition, a back trajectory analysis has also been presented to indicate that transported air masses can have significant impact on spectral pattern of SSA. ©2016. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62745
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
There are no files associated with this item.
作者单位: S. K. Mitra Centre for Research in Space Environment, Institute of Radio Physics and Electronics, University of Calcutta, Kolkata, India
Recommended Citation:
Talukdar S.,Jana S.,Maitra A.. Dominance of pollutant aerosols over an urban region and its impact on boundary layer temperature profile[J]. Journal of Geophysical Research: Atmospheres,2017-01-01,122(2)