Aerosol black carbon characteristics over Central India: Temporal variation and its dependence on mixed layer height

Kompalli, Sobhan Kumar; Babu, S. Suresh; Moorthy, K. Krishna; Manoj, Mohanan R.; Kumar, Nishant; Shaeb, K. Hareef Baba; Joshi, Anjali

doi:10.1016/j.atmosres.2014.04.015

Cited by 75 publications

(42 citation statements)

References 58 publications

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“…Recently, results obtained for 2015 indicated a significant contribution of biomass burning to BC concentrations for the place (Alves et al, 2016). These average concentrations were higher in winter campaigns because the removal of BC from the atmosphere is controlled by seasonal variations and this removal occurs more slowly in winter, when the atmosphere is more stable (Kompalli et al, 2014;Gabbi et al, 2015). The mean values recorded in Londrina and Maringa are lower than those recorded in cities such as Rio de Janeiro (2.4 µg m -3 ) by Godoy et al (2009) and Sao Paulo (3.26 µg m -3 ) by Almeida et al (2014).…”

Section: Resultscontrasting

confidence: 39%

Inorganic Chemical Composition of Fine Particulates in Medium-Sized Urban Areas: A Case Study of Brazilian Cities

Beal

Bufato

Almeida

et al. 2017

Aerosol Air Qual. Res.

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The aim of this study was to characterize the inorganic chemical composition of fine inhalable atmospheric particulate matter (PM 2.5 ) in medium-sized cities in Brazil. These cities account for a significant proportion of the population and are growing at rates above the national average, thereby demonstrating the importance of carefully analysing the possible impact of such growth on air quality over the coming decades. In 2013 and 2014, this study collected PM 2.5 samples from sites in the cities of Londrina and Maringa in two seasons: winter and summer. The mean concentration of PM 2.5 ranged from 4.4 µg m -3 and 3.7 µg m -3 during the summer to 10.3 µg m -3 and 8.0 µg m -3 in winter in Londrina and Maringa, respectively. The analysis of the major water-soluble ions, nitrate, sulphate and chloride, showed that they accounted for between 16.5% and 35.1% from the mass of PM 2.5 , with sulphate providing the greatest contribution in all the campaigns. The nitrate/sulphate ratios ranged from 0.2 and 0.6, which are similar to the figures cited in the literature for other regions of the world. Although the PM 2.5 concentrations are much lower than those observed in Asia and in Sao Paulo the participation of ions (%) is very close to that observed in Asian cities and significantly higher than the values recorded in other areas of Brazil, possibly as a result of the increased influence of burning of biomass and waste. The metals Zn, Pb, Cu and Mn found in the samples from all campaigns indicate that, in general, mobile sources are the main contributor to PM 2.5 . The winter campaigns showed the highest concentrations of black carbon equivalent (BCe). Absolute principal component analysis and enrichment factor analysis indicate the contribution of vehicular emission sources and biomass and waste burning to the inorganic chemical composition of PM 2.5 .

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Section: Resultscontrasting

confidence: 39%

Inorganic Chemical Composition of Fine Particulates in Medium-Sized Urban Areas: A Case Study of Brazilian Cities

Beal

Bufato

Almeida

et al. 2017

Aerosol Air Qual. Res.

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“…These factors determine the pace of air masses movements and the potential processes of concentration and dilution of air pollutants comprised within, as a result of an air inflow from neighbouring areas, more or less polluted [1,13,15,44]. Wind is also a fundamental dispersing factor defining the spread direction of air pollutant plumes emitted from various emission sources, which leads to considerable diversity of pollution levels in the air caused by their influence.…”

Section: Introductionmentioning

confidence: 99%

“…Disturbance of ventilation conditions specific for high-density cities, where buildings block natural wind corridors, leads to accumulation of pollutants in the city centres [6,25]. Significant variation in terms of the wind speed influence on the pollutant concentrations is observed depending on the location of the measurement point [15]. For example, within urban street canyons, where road transport is primary emission source, air pollutants propagate differently compared to the open area [14,16,21,30,39,41].…”

Section: Introductionmentioning

confidence: 99%

Assessing the Impact of Wind Speed and Mixing-Layer Height on Air Quality in Krakow (Poland) in the Years 2014-2015

Oleniacz¹,

Bogacki²,

Szulecka³

et al. 2016

ZNPRzBiS

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“…To assess the regional and global climate change, a detailed study of spatiotemporal distribution of BC concentration is required; BC being inert with around five days of residence time can be transported over long distances [13]. Although several studies have been carried out in different cities around the world (including Beijing [14], Lahore [15] and, in India, Delhi [16], Trivandrum [17], Ahmedabad [18], Pune [19], Vishakhaptnam [20], and Agartala [21]), few studies are available for the eastern-central plain region of the country such as Nagpur [22]. In most of the studies, BC mass concentration has been reported to be the highest in winter season, particularly in December.…”

mentioning

confidence: 99%

Wintertime Variation of Black Carbon in PM2.5 Aerosols Over an Urban Industrial City in East-Central India

Ahirwar¹,

Bajpai²

2017

Pol. J. Environ. Stud.

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Atmospheric aerosol affects local, regional, and global climate by directly absorbing and scattering the incoming and outgoing solar radiation [1], indirectly by altering the cloud microphysical properties [2], and semi-directly by reducing cloud coverage [3]. Aerosols also have an adverse impact on human health -particularly regarding respiratory and cardiovascular diseases [4]. Black carbon (BC) is a strongly light-absorbing component of the atmospheric aerosol, mainly PM 2.5 [5] formed during incomplete combustion of fossil fuels, biofuels, and biomass burning [6]. BC contributes to global warming [7][8] by possibly altering precipitation patterns [9] and melting glaciers due to snow albedo reduction [10]. Due to rapid urbanization and industrialization during the last decade, India and China are the largest BC emitters in the world, contributing 25 to 30% of global emissions of BC Pol. J. Environ. Stud. Vol. 26, No. 4 (2017), 1443-1451 , with 1.55 being the monthly average ratio for nighttime and daytime concentrations. Monthly average diurnal variation showed two distinct peaks, at morning with 39.84 µgm -3 (7:00-8:00 IST (Indian Standard Time)), and at night with 35.55 µgm -3 (00:00 -1:00 IST);and two distinct valleys, with lowest BC concentration (7.11 µgm , consistent with the nighttime average. A clear negative correlation between BC mass concentration and wind speed (r = -0.75), relative humidity (r = -0.30) and temperature (r = -0.19) was observed. The back-trajectory at surface level (50 m and 500 m) mostly originated from northeastern India, and for higher altitude (5,000 m), from Middle-Eastern and Arabian countries, except during the last week of December (Indian Ocean). The ratio and difference between BC mass measured at 370 nm and 880 nm showed biomass burning being the dominant cause at night.

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Aerosol black carbon characteristics over Central India: Temporal variation and its dependence on mixed layer height

Cited by 75 publications

References 58 publications

Inorganic Chemical Composition of Fine Particulates in Medium-Sized Urban Areas: A Case Study of Brazilian Cities

Inorganic Chemical Composition of Fine Particulates in Medium-Sized Urban Areas: A Case Study of Brazilian Cities

Assessing the Impact of Wind Speed and Mixing-Layer Height on Air Quality in Krakow (Poland) in the Years 2014-2015

Wintertime Variation of Black Carbon in PM2.5 Aerosols Over an Urban Industrial City in East-Central India

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