Investigation of potential source regions of atmospheric Black Carbon in the data deficit region of the western Himalayas and its foothills

Soni, Ashish; Decesari, Stefano; Shridhar, Vijay; Prabhu, Vignesh; Panwar, Pooja; Marinoni, Angela

doi:10.1016/j.apr.2019.07.015

Cited by 20 publications

(7 citation statements)

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“…3 ). Several investigators have attributed the diurnal variation to the combined effect of meteorological and anthropogenic activities (Babu et al, 2002 ; Soni et al, 2019 ). During the study period, BC ff contributed ~ 88% to the observed total BC.…”

Section: Resultsmentioning

confidence: 99%

Characteristics and health risk assessment of fine particulate matter and surface ozone: results from Bengaluru, India

Prabhu

Singh

Kulkarni

et al. 2022

Environ Monit Assess

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Urban air pollution is a complex problem, which requires a multi-pronged approach to understand its dynamics. In the current study, various aspects of air pollution over Bengaluru city were studied utilizing simultaneous reference-grade measurements (during the period July 2019 to June 2020) of fine particulate matter mass concentration (PM 2.5 ), aerosol black carbon mass concentrations (BC), and surface ozone (O 3 ) concentrations. The study period mean PM 2.5 , BC, and O 3 were observed to be 26.8 ± 11.5 µg m −3 , 5.6 ± 2.8 µg m −3 , and 25.5 ± 12.4 ppb, respectively. Statistical methods such as principal component analysis, moving average subtraction method, conditional bivariate probability function, and concentration weighted trajectory analysis were performed to understand the dynamics of air pollution over Bengaluru and its long-range transportation pathways. Some of the major findings from the statistical analyses include (i) contrasting association in BC versus O 3 and PM 2.5 versus O 3 ; (ii) around one-fourth of the observed receptor site BC was contributed by local sources/emissions; and (iii) the source locations potentially contributing to BC and PM 2.5 were spatially different. In Bengaluru, long-term exposure to PM 2.5 resulted in around 3413, 3393, 1016, and 147 attributable deaths for the health endpoints chronic obstructive pulmonary disorder, ischemic heart disease, stroke, and lung cancer, respectively. Long-term exposure to O 3 resulted in around 155 attributable deaths for respiratory diseases, as estimated by the AirQ + model. Finally, the limitations of the study in terms of data availability and analysis have been detailed. Supplementary information The online version contains supplementary material available at 10.1007/s10661-022-09852-6.

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Section: Resultsmentioning

confidence: 99%

Characteristics and health risk assessment of fine particulate matter and surface ozone: results from Bengaluru, India

Prabhu

Singh

Kulkarni

et al. 2022

Environ Monit Assess

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“…In addition to assessing human health risks, source apportionment studies will help in formulating effective mitigation strategies for ambient PM. The Himalayas, in the north of India, constitute a pristine environment, and several studies have reported the influence of atmospheric aerosols emitted from the anthropogenic activities from the neighboring polluted regions [16][17][18][19]. However, detailed studies on particulate pollution from the industrialized areas in the proximity of the Himalayas are scarce.…”

Section: Electronic Supplementary Materialsmentioning

confidence: 99%

“…A substantial number of trajectories pass through the mountainous region of Uttarakhand and Himachal Pradesh, where air masses get loaded with emissions from the forest fires. Soni et al [19] reported that emissions from the forest fire in the neighboring mountains influence the local particulate pollution at Dehradun city. Also, during the summer season, some of these trajectories pass through the semiarid regions of Western India.…”

Section: Back Trajectory Analysis and Fire Datamentioning

confidence: 99%

Sources and health risks of atmospheric particulate matter at Bhagwanpur, an industrial site along the Himalayan foothills

et al. 2020

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Temporal variations in atmospheric particulate matter (PM) were studied in Bhagwanpur-a data-deficient area located along the foothills of the Himalayas. The concentrations of respirable suspended particulate matter (RSPM) and PM 0.4-10 µm (categorized into eight size fractions) were measured during winter and summer of 2014-2015. The RSPM concentration over a 24-h period was found to be 259.6 ± 52.6 µg/m 3 , which is 2.6 times greater than the permissible limit set by the Indian National Ambient Air Quality Standards. A significant difference (p < 0.05, t test) in RSPM with seasons was observed with winter maximum (284.6 ± 48.6 µg/m 3) and summer minimum (234.5 ± 44.8 µg/m 3). Size fractionated PM measurements revealed maximum concentration (36.4 ± 5.2 µg/m 3) in PM 9.0-10.0 µm, while least concentration was observed in PM 2.1-3.3 µm (16.8 ± 2.3 µg/m 3). Further, on quantification of 13 chemical species associated with RSPM, it was observed that mass concentration followed the trend of Ca > K > Mg > Al > Zn > Fe > Mn > Cr > Co > Ni > Cu > Pb > C d. Source apportionment through principal component analysis revealed the sources such as industrial, vehicular, and crustal. The excess cancer risk for Cr was about 2.7 times higher than the tolerance level (10 −4), while only Pb was below the safe limit (10 −6). However, total ECR for Cr, Cd, Pb, and Ni was about 3 times higher than the tolerance level. Three-day air mass back trajectory analysis reveals that emissions from biomass burning over the neighbouring regions adversely affect the air quality at the study site. The results of this study can be utilized toward the effective implementation of environmental regulations at the study site.

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“…The findings will also aid in quantifying the contribution of Himalayan glaciers melt to eustatic sea-level rise 1 , currently estimated to raise sea level by 0.52 cm by the end of 21 st century. 24 In contrast to model-based approaches [26][27][28] , recent radiocarbon measurements on BC particles deposited on glaciers and in aerosols revealed a much higher (~50%) fossil fuel contribution across the Himalayan-Tibetan Plateau. 25 These radiocarbon measurements were however restricted to the central and eastern Himalayan region, which falls under the strong influence of the Indian Summer Monsoon.…”

Section: Introductionmentioning

confidence: 99%

Biomass-Derived Provenance Dominates Glacial Surface Organic Carbon in the Western Himalaya

Nizam

Sen

Vinoj

et al. 2020

Environ. Sci. Technol.

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Investigation of potential source regions of atmospheric Black Carbon in the data deficit region of the western Himalayas and its foothills

Cited by 20 publications

References 58 publications

Characteristics and health risk assessment of fine particulate matter and surface ozone: results from Bengaluru, India

Characteristics and health risk assessment of fine particulate matter and surface ozone: results from Bengaluru, India

Sources and health risks of atmospheric particulate matter at Bhagwanpur, an industrial site along the Himalayan foothills

Biomass-Derived Provenance Dominates Glacial Surface Organic Carbon in the Western Himalaya

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