气候变化领域集成服务门户(CCPortal): Chemical characterization of wintertime aerosols over the Arabian Sea: Impact of marine sources and long-range transport

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DOI	10.1016/j.atmosenv.2020.117749
	Chemical characterization of wintertime aerosols over the Arabian Sea: Impact of marine sources and long-range transport
	Bikkina P.; Sarma V.V.S.S.; Kawamura K.; Bikkina S.; Kunwar B.; Sherin C.K.
发表日期	2020
ISSN	1352-2310
卷号	239
英文摘要	We examined here the compositional characteristics of total suspended particulate (TSP) samples collected along the east coast of the Arabian Sea during a winter cruise (SS379: 6–24 December 2018) to understand the extent of influence of air pollutants from terrestrial sources. The TSP samples (N = 17) were analyzed for water-soluble inorganic species (WSIS), elemental carbon (EC), organic carbon (OC) and water-soluble organic carbon (WSOC). Backward air mass trajectories and satellite-based fire counts revealed an influence of long-range transport of biomass burning emissions in the Indo-Gangetic Plain and southern India. Anthropogenic (82–97%) SO42− is the most abundant WSIS followed by Na+ and/or NH4+. Ambient EC loadings (0.5–2.4 μg m−3) and OC/EC ratios (2.5–10.5) are higher than usually expected for fossil-fuel combustion sources. Low mass ratios of NO3−/non-sea-salt SO42− (0.08–0.49), as well as high ratios of nss-K+/EC (0.14–1.18) and WSOC/OC (0.30–0.74), highlight the significance of coal combustion and biomass burning emissions in the regional influx of air pollutants to the Arabian Sea. The multiple linear regression analysis has indicated strong correlations among sea salt components (Na+, Cl− and Mg2+), carbonaceous components (OC, EC and WSOC), and anthropogenic WSIS (NH4+ and SO42−). Furthermore, we used minimum R-squared technique based primary OC/EC ratio in the EC-tracer method to estimate the contribution of secondary organic carbon (SOC) to OC (7–61%) and TSP mass (0.7–11%). Overall, the composition of TSP is characterized by 21 ± 10% of particulate organic matter, 2.3 ± 1.1% of EC, 21 ± 9% of anthropogenic WSIS and 43 ± 15% of unidentified fraction including dust. This study has implications for understanding the evolving nature of secondary inorganic and organic aerosols in the continental outflows. © 2020 Elsevier Ltd
关键词	Arabian sea Chemical composition Coastal aerosols Indo-Gangetic Plain Southern India
语种	英语
scopus关键词	Aerosols; Air pollution; Fossil fuels; Linear regression; Organic carbon; Particles (particulate matter); Sodium compounds; Biomass burning emissions; Chemical characterization; Compositional characteristics; Multiple linear regression analysis; Particulate organic matters; Secondary organic carbons (SOC); Total suspended particulates; Water-soluble organic carbon; Coal combustion; ammonia; anion; calcium ion; carbon; cation; chloride; coal; element; fossil fuel; magnesium ion; mesylic acid; methane; nitrate; organic carbon; organic matter; potassium ion; sea water; sodium chloride; sodium ion; sulfate; water; aerosol; air mass; anthropogenic effect; anthropogenic source; atmospheric pollution; long range transport; pollutant source; suspended particulate matter; winter; aerosol; air pollutant; airborne particle; Arabian Sea; Article; Bay of Bengal; biological activity; biomass; chemical composition; combustion; concentration (parameter); marine environment; meteorology; mineral dust; priority journal; seashore; suspended particulate matter; winter; Arabian Sea; Gangetic Plain; Indian Ocean
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/249009
作者单位	CSIR-National Institute of Oceanography, Regional Centre, Visakhapatnam, Andhra Pradesh 530017, India; Chubu University, Kasugai-shi, Aichi 487-8501, Japan; Center for Marine Living Resources and Ecology, Kochi, Kerala 682508, India
推荐引用方式 GB/T 7714	Bikkina P.,Sarma V.V.S.S.,Kawamura K.,et al. Chemical characterization of wintertime aerosols over the Arabian Sea: Impact of marine sources and long-range transport[J],2020,239.
APA	Bikkina P.,Sarma V.V.S.S.,Kawamura K.,Bikkina S.,Kunwar B.,&Sherin C.K..(2020).Chemical characterization of wintertime aerosols over the Arabian Sea: Impact of marine sources and long-range transport.ATMOSPHERIC ENVIRONMENT,239.
MLA	Bikkina P.,et al."Chemical characterization of wintertime aerosols over the Arabian Sea: Impact of marine sources and long-range transport".ATMOSPHERIC ENVIRONMENT 239(2020).