Black carbon aerosol mass concentration variation in urban and rural environments of India—a case study

Badarinath, K. V. S.; Kharol, Shailesh Kumar; Reddy, R.R.; Gopal, K. Rama; Narasimhulu, K.; Reddy, L. Siva Sankara; Kumar, Krishan

doi:10.1002/asl.206

Cited by 27 publications

(8 citation statements)

References 22 publications

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“…Similar annual variations of the anthropogenic aerosols have been observed within urban environments in India (Badarinath et al, 2009;Ramachandran and Kedia, 2010;Pathak et al, 2010). In addition, the boundary layer mixing height is lower in winter and traps the pollutants near the ground as a result of temperature inversions.…”

Section: Seasonal and Monthly Variability In Pm Concentrationssupporting

confidence: 65%

Temporal changes of particulate concentration in the ambient air over the city of Zahedan, Iran

Rashki

Rautenbach

Eriksson

et al. 2011

Air Qual Atmos Health

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Air pollution in developing countries has recently become a serious environmental problem which needs more active air quality monitoring and analyses. To assess air quality characteristics over the city of Zahedan, southeast Iran, airborne Particulate Matter (PM) concentrations with aerodynamic diameters of < 10 µm, < 2.5 µm and < 1.0 µm were measured during the period July 2008 to March 2010 using an Environmental Dust Monitor (EDM-180). The data were analyzed on daily, monthly and seasonal basis. The highest monthly mean PM 10 levels (172 gm -3 ) were recorded during the summer period (JuneAugust), presumably due to frequent dust storms from the nearby Sistan desert located to the north, while less PM 10 concentrations are recorded in winter (December-February) (101 gm -3 ). Linear regression analysis between the PM 2.5 and PM 10 time series reveals high correlation coefficients (r>0.82) for all seasons, implying that PM 10 and PM 2.5 may have the same source regions, or that they are influenced by the same local conditions. In contrast, neutral correlation is found between PM 10 and PM 1.0 in autumn and winter. Taking into account that the annual variation of PM 1.0 exhibits a clear pattern of peaking in winter and dropping in summer (in contrast to PM 10 ), it is suspected that PM 1.0 is of different origin than PM 10 and mainly influenced by local anthropogenic emissions. The daily PM 10 variation is strongly seasonally defined. The maximum PM 10 concentrations occur in the morning hours during winter, autumn (September-November) and early spring (March), while in summer PM 10 concentrations increase significantly in the afternoon closely associated with the intense northerly winds blowing from the desert. As far as the Air Quality Index (AQI) is concerned, its highest monthly values occur in summer, while they are reduced in winter. Desert dust 2 aerosols are found to be the major component in determining the AQI in Zahedan. The analysis shows that 15.3 % of the days are unhealthy for sensitive people, while 2 % are considered as hazardous.

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Section: Seasonal and Monthly Variability In Pm Concentrationssupporting

confidence: 65%

Temporal changes of particulate concentration in the ambient air over the city of Zahedan, Iran

Rashki

Rautenbach

Eriksson

et al. 2011

Air Qual Atmos Health

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show abstract

“…Various studies from different locations in India have reported surface BC levels Badarinath et al, 2007Badarinath et al, , 2009Latha and Badarinath, 2003;Pant et al, 2006;Tiwari et al, 2009;Ram et al, 2010;Ramachandran and Rajesh, 2007;Safai et al, 2007Safai et al, , 2008Sreekanth et al, 2007;Tripathi et al, 2005;Dumka et al, 2010;Das et al, 2009;Chowdhury et al, 2007;Kumar et al, 2011a;Pathak et al, 2010;Niranjan et al, 2006). However, studies on long term trends in BC aerosols over any location are very scarce.…”

Section: Introductionmentioning

confidence: 93%

Long term studies on characteristics of black carbon aerosols over a tropical urban station Pune, India

Safai

Raju

Budhavant

et al. 2013

Atmospheric Research

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“…Ramachandran and Rajesh, 2007;Pathak et al, 2010;Satheesh et al, 2010) its large fractions over west, north and east BoB highlight the strong anthropogenic influence and the outflow of pollutants over the marine environment during winter. It may also be noted that BC concentrations are larger during winter season throughout the Indian sub-continent (Badarinath et al, 2009b). An interesting feature that is revealed from Table 3 is the nearly absence of mineral-transported aerosols corresponding to dust particles; however, they exhibit larger fraction over west BoB justified from the chemical analysis of the IGP outflow .…”

Section: Opac Simulationsmentioning

confidence: 99%

Extremely large anthropogenic-aerosol contribution to total aerosol load over the Bay of Bengal during winter season

et al. 2011

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Abstract. Ship-borne observations of spectral aerosol optical depth (AOD) have been carried out over the entire Bay of Bengal (BoB) as part of the W-ICARB cruise campaign during the period 27 December 2008-30 January 2009. The results reveal a pronounced temporal and spatial variability in the optical characteristics of aerosols mainly due to anthropogenic emissions and their dispersion controlled by local meteorology. The highest aerosol amount, with mean AOD 500 >0.4, being even above 1.0 on specific days, is found close to the coastal regions in the western and northern parts of BoB. In these regions theÅngström exponent is also found to be high (∼1.2-1.25) indicating transport of strong anthropogenic emissions from continental regions, while very high AOD 500 (0.39±0.07) and α 380−870 values (1.27±0.09) are found over the eastern BoB. Except from the large α 380−870 values, an indication of strong fine-mode dominance is also observed from the AOD curvature, which is negative in the vast majority of the cases, suggesting dominance of an anthropogenic-pollution aerosol type. On the other hand, clean maritime conditions are rather rare over the region, while the aerosol types are further examined through a classification scheme based on the relationship between α and dα. It was found that even for the same α values the fine-mode dominance is larger for higher AODs showing the strong continental influence over the marine environment of Correspondence to: S. Kumar Kharol (shaileshan2000@yahoo.co.in) BoB. Furthermore, there is also an evidence of aerosol-size growth under more turbid conditions indicative of coagulation and/or humidification over specific BoB regions. The results obtained using OPAC model show significant fraction of soot aerosols (∼6 %-8 %) over the eastern and northwestern BoB, while coarse-mode sea salt particles are found to dominate in the southern parts of BoB.

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Black carbon aerosol mass concentration variation in urban and rural environments of India—a case study

Cited by 27 publications

References 22 publications

Temporal changes of particulate concentration in the ambient air over the city of Zahedan, Iran

Temporal changes of particulate concentration in the ambient air over the city of Zahedan, Iran

Long term studies on characteristics of black carbon aerosols over a tropical urban station Pune, India

Extremely large anthropogenic-aerosol contribution to total aerosol load over the Bay of Bengal during winter season

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