干旱区生态环境知识资源中心(Arid): Seasonal Transport Pathway and Sources of Carbonaceous Aerosols at an Urban Site of Eastern Himalaya

Arid

DOI	10.1007/s41810-021-00106-5
	Seasonal Transport Pathway and Sources of Carbonaceous Aerosols at an Urban Site of Eastern Himalaya
	Rai, Akansha; Mukherjee, Sauryadeep; Choudhary, Nikki; Ghosh, Abhinandan; Chatterjee, A.; Mandal, T. K.; Sharma, S. K.; Kotnala, R. K.
通讯作者	Sharma, SK (corresponding author), Natl Phys Lab, CSIR, Dr KS Krishnan Rd, New Delhi 110012, India. ; Sharma, SK (corresponding author), Acad Sci & Innovat Res AcSIR, Ghaziabad 201002, India.
来源期刊	AEROSOL SCIENCE AND ENGINEERING
ISSN	2510-375X
EISSN	2510-3768
出版年	2021
英文摘要	In this study, we examined the seasonal transport pathways of carbonaceous species [Organic Carbon (OC), Elemental Carbon (EC), Water-Soluble Organic Carbon (WSOC), Primary Organic Carbon (POC), Secondary Organic Carbon (SOC), and Total Carbonaceous Aerosols (TCAs)] of PM2.5 and PM10 over a semi-urban high-altitude site of Darjeeling (27.041oN, 88.266oE, 2200 m above mean sea level (amsl); an eastern Himalayan region), India during August 2018-July 2019. The annual average concentrations of PM2.5 and PM10 were 37 +/- 12 mu g m(-3) and 55 +/- 18 mu g m(-3), respectively that was within but quite close to the threshold limit of National Ambient Air Quality Standards (NAAQS) (annual 60 mu g m(-3) for PM10; and 40 mu g m(-3) for PM2.5). The seasonal average concentration of OC in PM2.5 was highest in pre-monsoon (4.2 +/- 1.7 mu g m(-3)) > post-monsoon (4.0 +/- 1.6 mu g m(-3)) > winter (3.3 +/- 1.5 mu g m(-3)) > monsoon (2.2 +/- 0.9 mu g m(-3)) whereas OC in PM10, in the order of highest in post-monsoon (5.9 +/- 2.4 mu g m(-3)) > winter (5.4 +/- 2.0 mu g m(-3)) > pre-monsoon (5.2 +/- 2.1 mu g m(-3)) > monsoon (3.6 +/- 0.9 mu g m(-3)). Similar seasonal variation in case of EC in both PM2.5 (winter 1.8 +/- 0.8 mu g m(-3); pre-monsoon 2.2 +/- 0.9 mu g m(-3); monsoon 1.2 +/- 0.4 mu g m(-3); post-monsoon 2.2 +/- 1.1 mu g m(-3)) and PM10 (winter 2.7 +/- 1.0 mu g m(-3); pre-monsoon 3.0 +/- 1.1 mu g m(-3); monsoon 1.2 +/- 0.4 mu g m(-3); post-monsoon 1.9 +/- 1.2 mu g m(-3)) were observed during the study period. Based on different altitudes (100, 500, 1000 m), the seasonal backward trajectory and its concentration-weighted trajectory (CWT) analysis reveal the local, Indo-Gangetic Plain (IGP), the Thar desert, semi-arid, central highlands, Nepal, and the Bay of Bengal (BoB) as the common pollutant transporting regions to the observational site of Darjeeling. Also, its cluster analysis at 500 m above ground level (AGL) indicates that air mass originates mainly from 3 sides [western region, Thar desert (17.6%); north-western region, Nepal (45.1%); southern region, Bangladesh (37.3%)] during the study. Due to high tourist influx in pre-monsoon (peak tourist season), the maximum contribution of carbonaceous aerosols was mainly from the vehicular sources, coal combustion, transboundary pollutants, biomass burning in the IGP region, and the formation of secondary organic aerosols (SOA). Besides, active Terra and Aqua MODIS fire and thermal anomalies (>= 80 per cent) indicated the maximum prevalence of fire spots during pre-monsoon across India (except the Thar desert) followed by post-monsoon (due to crop-residue burning) in Punjab and Haryana.
英文关键词	PM Carbonaceous aerosols Backward trajectory Cluster analysis CWT Fire count
类型	Article ; Early Access
语种	英语
收录类别	ESCI
WOS记录号	WOS:000660362300001
WOS关键词	SOLUBLE ORGANIC-CARBON ; PARTICULATE MATTER ; ATMOSPHERIC AEROSOLS ; OPTICAL-PROPERTIES ; POTENTIAL SOURCES ; ELEMENTAL CARBON ; TIBETAN PLATEAU ; AIR-POLLUTION ; BLACK CARBON ; PM2.5
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/352995
作者单位	[Rai, Akansha; Choudhary, Nikki; Mandal, T. K.; Sharma, S. K.; Kotnala, R. K.] Natl Phys Lab, CSIR, Dr KS Krishnan Rd, New Delhi 110012, India; [Rai, Akansha; Choudhary, Nikki; Sharma, S. K.] Acad Sci & Innovat Res AcSIR, Ghaziabad 201002, India; [Mukherjee, Sauryadeep; Ghosh, Abhinandan; Chatterjee, A.] Bose Inst, Ctr Astroparticle Phys & Space Sci, Darjeeling 734102, India
推荐引用方式 GB/T 7714	Rai, Akansha,Mukherjee, Sauryadeep,Choudhary, Nikki,et al. Seasonal Transport Pathway and Sources of Carbonaceous Aerosols at an Urban Site of Eastern Himalaya[J],2021.
APA	Rai, Akansha.,Mukherjee, Sauryadeep.,Choudhary, Nikki.,Ghosh, Abhinandan.,Chatterjee, A..,...&Kotnala, R. K..(2021).Seasonal Transport Pathway and Sources of Carbonaceous Aerosols at an Urban Site of Eastern Himalaya.AEROSOL SCIENCE AND ENGINEERING.
MLA	Rai, Akansha,et al."Seasonal Transport Pathway and Sources of Carbonaceous Aerosols at an Urban Site of Eastern Himalaya".AEROSOL SCIENCE AND ENGINEERING (2021).