Aerosol physical characteristics at Bhubaneswar, East coast of India

Das, Nigamananda; Baral, Saroj Sundar; Sahoo, Satyabrata; Mohapatra, Ranjan K.; Ramulu, T.S.; Das, Sonali; Chaudhury, G. Roy

doi:10.1016/j.atmosres.2009.04.013

Cited by 26 publications

(16 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 13 shows the trajectory clusters along with the trajectories for individual days in each season of summer (spring), monsoon, autumn and winter. Consistent with the local meteorological data, the synoptic wind also showed distinct advection pathways with dominant easterly contribution during all seasons, Das (2009) except in monsoon, where northwesterly marine air mass prevailed. Thus it appears that the potential sources were mainly distributed to the eastern locations of Ooty, i.e.…”

Section: Role Of Long-range Transportsupporting

confidence: 68%

Aerosol black carbon characteristics over a high-altitude Western Ghats location in Southern India

et al. 2014

View full text Add to dashboard Cite

Abstract. Aerosol black carbon (BC) mass concentrations were continuously monitored over a period of 2 years (April 2010 to May 2012) from a high-altitude location Ooty in the Nilgiris Mountain range in southern India to characterize the distinct nature of absorbing aerosols and their seasonality. Despite being remote and sparsely inhabited, BC concentrations showed significant seasonality with higher values (∼ 0.96 ± 0.35 µg m −3 ) in summer (March to May), attributed to increased vertical transport of effluents in the upwind valley regions, which might have been confined to the surrounding valley regions within the very shallow winter boundary layer. The local atmospheric boundary layer (ABL) influence in summer was further modulated by the long-range transported aerosols from the eastern locations of Ooty. During monsoon (June-August), the concentrations were far reduced (∼ 0.23 ± 0.06 µg m −3 ) due to intense precipitation. Diurnal variations were found conspicuous mainly during summer season associated with local ABL. The spectral absorption coefficients (α abs ) depicted, in general, flatter distribution (mostly < 1.0 for more than 85 % of daily mean values), suggesting the relative dominance of fossil fuel combustion, though showed marginal seasonal change with higher values of α abs in summer.

show abstract

Section: Role Of Long-range Transportsupporting

confidence: 68%

Aerosol black carbon characteristics over a high-altitude Western Ghats location in Southern India

et al. 2014

View full text Add to dashboard Cite

show abstract

“…The AOD at Delhi is slightly higher compared to AODs at some of the other Indian stations like Ahmedabad [Ganguly et al, 2006], Pune [Pandithurai et al, 2007;Dani et al, 2012], Visakhapatnam [Niranjan et al, 2011], Bangalore [Babu et al, 2002;Vinoj et al, 2004], and Trivandrum [Moorthy et al, 2007], but quite comparable with the values at the IGP stations such as Kanpur , Kharagpur [Niranjan et al, 2006], and Bhubneshwar [Das et al, 2009]. More details of seasonal AOD values at various Indian stations are also given in Table 3.…”

Section: Climatology Of Aod and Angstrom Parametersmentioning

confidence: 68%

Aerosol climatology at Delhi in the western Indo‐Gangetic Plain: Microphysics, long‐term trends, and source strengths

et al. 2013

View full text Add to dashboard Cite

[1] We present the climatology of aerosol microphysics, its trends, and impact of potential sources based on the long term measurements (for a period of 11.5 years from December 2001 to May 2012) of aerosol optical depths (AOD) in the spectral range 340-1020 nm from an urban center Delhi (28.6 N, 77.3 E, 238 m mean sea level) in the western Indo-Gangetic Plain (IGP). The study is the first ever long-term characterization of aerosols over the western IGP from the ground-based measurements. AODs are known to affect the air quality, visibility, radiative balance, and cloud microphysics of the region and IGP is one of the highest populated and polluted regions of the world. Our measurements show consistently high AOD during the entire period of observation. The seasonal variations of spectral AODs and Angstrom parameters are generally consistent every year. The AODs show a weak but statistically significant (in 95% confidence level) decreasing trend approximately À0.02/year at 500 nm, possibly, modulated by the pre-monsoon heavy dust loading during the first half of the observation period. The climatological monthly mean AOD at shorter wavelengths peaks twice, during June and November, while at longer wavelengths it shows only one peak in June. The annual variations of Angstrom exponent, a and its derivative, a′ suggest the prevalence of multi-modal aerosol size distributions at Delhi. The coarse-mode aerosols dominate during summer (March-June) and monsoon (July-September) seasons, whereas fine/accumulation mode enhances during post-monsoon (October-November) and winter (December-February) seasons. Potential advection pathways have been identified using concentration weighted trajectory (CWT) analysis of the 5 day isentropic air mass back trajectories at the observation site and their seasonal variations are discussed.

show abstract

“…The aethalometer has been operating with a flow-rate of 4 L/min and a time-resolution of 5 minutes. This kind of instruments (MAGEE aethalometer series) has been widely used in different studies for air pollution evaluation such as Madhavi Latha and Badarinath (2005), Cao et al (2009a, b), Das et al (2009), Dutkiewicz et al (2009), Invernizzi et al (2011, highlighting carbonaceous particles properties, mainly in urban areas.…”

Section: Instrument and Measurements Sitesmentioning

confidence: 99%

Black Carbon and Organic Components in the Atmosphere of Southern Italy: Comparing Emissions from Different Sources and Production Processes of Carbonaceous Particles

Pavese

Calvello

Esposito

2012

Aerosol Air Qual. Res.

View full text Add to dashboard Cite

Initial measurements of black carbon (BC) content at both 880 and 370 nm, obtained in two sites in southern Italy by an aethalometer, have been analyzed. The sites are located in the same region (Basilicata), but are affected by different emission sources. In one case the main source of BC is related to vehicular traffic from a nearby freeway. Data were collected, although not continuously, during 2008, 2009 and 2010. In the second case, a fresh crude-oil pre-treatment plant continuously burns petroleum-derived products, thus contributing to emissions of both carbonaceous matter and its organic component. The corresponding data-set was collected in the period January-April 2011. At the first site, two daily peaks were found for the BC content, typical of vehicles emissions, with maximum values ranging from 2000 ng/m 3 to 4700 ng/m 3 found during weekdays. This behavior disappears at the weekend or when polluted air-masses from north-east Europe are transported over the measurement site. At the second site, two daily peaks were never found, suggesting that crude oil chemical processes were the main source of the emissions. In this case, the maximum BC values ranged between 1000-8000 ng/m 3 , depending on the processes occurring at the fresh crude-oil pre-treatment plant. Moreover, the estimated level of BC at 370 nm was higher than that of BC at 880 nm in all months, expect for April, indicating a clear organic component in atmospheric aerosols. Finally, based on a best-fit procedure applied to the seven wavelengths' absorption coefficients, aerosols with different spectroscopic properties have been detected at these two sites.

show abstract

Aerosol physical characteristics at Bhubaneswar, East coast of India

Cited by 26 publications

References 15 publications

Aerosol black carbon characteristics over a high-altitude Western Ghats location in Southern India

Aerosol black carbon characteristics over a high-altitude Western Ghats location in Southern India

Aerosol climatology at Delhi in the western Indo‐Gangetic Plain: Microphysics, long‐term trends, and source strengths

Black Carbon and Organic Components in the Atmosphere of Southern Italy: Comparing Emissions from Different Sources and Production Processes of Carbonaceous Particles

Contact Info

Product

Resources

About