Arid
DOI10.1016/j.atmosres.2015.04.022
Identification of aerosol types over an urban site based on air-mass trajectory classification
Pawar, G. V.1; Devara, P. C. S.2; Aher, G. R.1
通讯作者Aher, G. R.
来源期刊ATMOSPHERIC RESEARCH
ISSN0169-8095
EISSN1873-2895
出版年2015
卷号164页码:142-155
英文摘要

Columnar aerosol properties retrieved from MICROTOPS II Sun Photometer measurements during 2010-2013 over Pune (18 degrees 32’N; 73 degrees 49’E, 559 m amsl), a tropical urban station in India, are analyzed to identify aerosol types in the atmospheric column. Identification/classification is carried out on the basis of dominant airflow patterns, and the method of discrimination of aerosol types on the basis of relation between aerosol optical depth (AOD(500) (nm),) and angstrom ngstrom exponent (AE, alpha). Five potential advection pathways viz., NW/N, SW/S, N, SE/E and L have been identified over the observing site by employing the NOAA-HYSPLIT air mass back trajectory analysis. Based on AE against AOD(500 nm), scatter plot and advection pathways followed five major aerosol types viz., continental average (CA), marine continental average (MCA), urban/industrial and biomass burning (UB), desert dust (DD) and indeterminate or mixed type (MT) have been identified. In winter, sector SE/E, a representative of air masses traversed over Bay of Bengal and Eastern continental Indian region has relatively small AOD (tau(p lambda) = 0.43 +/- 0.13) and high AE (alpha = 1.19 +/- 0.15). These values imply the presence of accumulation/submicron size anthropogenic aerosols. During pre-monsoon, aerosols from the NW/N sector have high AOD (tau(p lambda) = 0.61 +/- 0.21), and low AE (alpha = 0.54 +/- 0.14) indicating an increase in the loading of coarse-mode particles over Pune. Dominance of UB type in winter season for all the years (i.e. 2010-2013) may be attributed to both local/transported aerosols. During pre-monsoon seasons, MT is the dominant aerosol type followed by UB and DD, while the background aerosols are insignificant. (C) 2015 Elsevier B.V. All rights reserved.


英文关键词AOD angstrom ngstrom exponent Long range transport Air-mass Aerosol types
类型Article
语种英语
国家India
收录类别SCI-E
WOS记录号WOS:000358095800014
WOS关键词LONG-RANGE TRANSPORT ; INDO-GANGETIC BASIN ; INDIAN-OCEAN EXPERIMENT ; OPTICAL-PROPERTIES ; CLUSTER-ANALYSIS ; ATMOSPHERIC AEROSOL ; SIZE DISTRIBUTION ; SAHARAN DUST ; CHEMICAL-CHARACTERIZATION ; MICROPHYSICAL PROPERTIES
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/186143
作者单位1.Nowrosjee Wadia Coll, Dept Phys, Atmospher Phys Res Lab, Pune 411001, Maharashtra, India;
2.Amity Univ Haryana Manesar, Amity Ctr Ocean Atmospher Sci & Technol, Gurgaon 122413, India
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Pawar, G. V.,Devara, P. C. S.,Aher, G. R.. Identification of aerosol types over an urban site based on air-mass trajectory classification[J],2015,164:142-155.
APA Pawar, G. V.,Devara, P. C. S.,&Aher, G. R..(2015).Identification of aerosol types over an urban site based on air-mass trajectory classification.ATMOSPHERIC RESEARCH,164,142-155.
MLA Pawar, G. V.,et al."Identification of aerosol types over an urban site based on air-mass trajectory classification".ATMOSPHERIC RESEARCH 164(2015):142-155.
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