Atmospheric ultrafine aerosol number concentration and its correlation with vehicular flow at two sites in the western Himalayan region: Kullu-Manali, India

Sharma, Nand Lal; Kuniyal, Jagdish Chandra; Singh, Mahavir; Sharma, Priyanka; Chand, Kesar; Negi, Ajay K; Sharma, Manum; Thakur, Harinder Kumar

doi:10.1007/s12040-011-0046-9

Cited by 17 publications

(7 citation statements)

References 45 publications

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“…The PM UF concentration over Darjeeling was found to be higher than the ultrafine particle concentration (1-20 nm) over Kothi, another high-altitude (2530 masl) Himalayan station in India as observed by Sharma et al (2011). They observed that particle concentration on an average lied below 20,000 cm -3…”

Section: Comparison With Other High-altitude Stationsmentioning

confidence: 93%

Atmospheric Fine Mode Particulates at Eastern Himalaya, India: Role of Meteorology, Long-Range Transport and Local Anthropogenic Sources

Adak

Chatterjee

Singh

et al. 2014

Aerosol Air Qual. Res.

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A study on atmospheric fine (less than 2.0 µm) particulate matter was performed for the first time over the eastern Himalayas in India in order to investigate the formation and sources in two different seasons, pre-monsoon (Mar-May) and winter (Dec-Feb), for three consecutive years, 2008, 2009 and 2010. Fine mode aerosols were further segregated into three modes: ultrafine (less than 0.32 µm), superfine (0.32-1.0 µm) and fine (1.0-2.0 µm). The study was carried out at a high altitude hill station Darjeeling (2200 m asl) in the eastern Himalayas, India, using an aerosol spectrometer (GRIMM) to measure aerosol number concentrations. It was found that the ultrafine and superfine aerosol (less than 1.0 µm) concentrations were higher in the pre-monsoon period compared to winter, whereas the concentrations of fine mode aerosols were comparable during these two seasons. Meteorological conditions like sunny/non-cloudy days with higher radiative fluxes and lower humidity favored the formation of ultrafine aerosols from their precursor gases, and the initiation of this formation were observed during 0900-1000 hours LT. Superfine aerosols were mainly found to be aerosols transported from long distances during the pre-monsoon period, and showed peak levels during late morning till late afternoon. In contrast, higher concentrations were seen at night in winter. The fine mode aerosols were mainly locally generated anthropogenic aerosols, mostly emitted from vehicular sources during the pre-monsoon period, and from biomass burning during winter, with sharp diurnal peaks during morning and evening. The long-term study on size segregated aerosol concentrations carried out in this work is of considerable importance, and can be helpful for the validation of several regional and global aerosol models, and for other climate related studies that focus on the Himalayan region.

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Section: Comparison With Other High-altitude Stationsmentioning

confidence: 93%

Atmospheric Fine Mode Particulates at Eastern Himalaya, India: Role of Meteorology, Long-Range Transport and Local Anthropogenic Sources

Adak

Chatterjee

Singh

et al. 2014

Aerosol Air Qual. Res.

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“…The aerosols of various sizes are generated by different sources, such as, coarse particles(〉2.5 ㎛) are generated from blowing and excavation etc., but fine particles(〈2.5 ㎛) are mainly generated from traffic, combustion and secondary formation in atmosphere. (Buzorius et al, 1999;Sharma et al, 2011) In addition, aerosol number concentrations are influenced by regional and local sources and meteorological conditions. It has been assumed that the number concentration for fine mode particles have less variation than coarse particles due to the feature of measurement site with no large anthropogenic sources.…”

Section: Instruments and Measurementsmentioning

confidence: 99%

“…(Paatero et al, 2005;Hussein et al, 2006) Also the number concentrations of atmospheric ultrafine aerosol have been studied. (Sharma et al, 2011;Longly et al, 2005;Minoura and Takekawa …”

Section: Introductionmentioning

confidence: 99%

Investigation of Aerosol Number Concentration at Gosan Site in Jeju, Korea

Kang¹,

2012

Journal of Environmental Science International

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The aerosol number concentration have measured with an aerodynamic particle sizer spectrometer(APS) at Gosan site in Size-fractioned aerosol number concentrations are dramatically decreased with increased particle size. The size-fractioned aerosol number concentrations in size range 0.8∼4.0 ㎛ during nighttime are evidently higher than during daytime, but similar levels are appeared in other size range. The seasonal differences in the size-fractioned number concentrations for smaller size range(<0.7 ㎛) are not observed, however, the remarkable seasonal differences are observed for larger size than 0.7 ㎛.

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“…Many field deployments confirm that the water-based CPC has comparable performance to a butanol-based CPC when examining urban pollution and diesel combustion aerosol (Franklin et al, 2010;Jeong and Evans, 2009;Kaminsky et al, 2009;Keller et al, 2013;Lee et al, 2013;Sharma et al, 2011;Tsang et al, 2008). Based on these promising research results, it is desirable to explore the advanced water-based CPC for airborne measurements.…”

Section: Introductionmentioning

confidence: 96%

Simulation-aided characterization of a versatile water condensation particle counter for atmospheric airborne research

Mei

Spielman

Hering

et al. 2021

Preprint

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Abstract. Capturing the vertical profiles and horizontal variations of atmospheric aerosols often requires accurate airborne measurements. With the advantage of avoiding health and safety concerns related to the use of butanol or other chemicals, a water-based condensation particle counter (wCPC) has emerged to provide measurements under various environments. However, the airborne deployment of wCPC is relatively rare due to the lack of characterization of wCPC performance. This study investigates the performance of a commercial "versatile" water CPC (vWCPC Model 3789, TSI) under low-pressure conditions. The effect of conditioner temperature on wCPC performance at low pressure is examined through numerical simulation and laboratory experiments. We show that the default instrument temperature setting of 30 °C for the conditioner is not suitable for airborne measurement and that the optimal conditioner temperature for low-pressure operation is 27 °C. Additionally, we show that insufficient droplet growth becomes more significant under the low-pressure operation. The variation in the chemical composition can contribute up to 20 % uncertainty in the counting efficiency of the wCPC, but this variation is independent of pressure.

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Atmospheric ultrafine aerosol number concentration and its correlation with vehicular flow at two sites in the western Himalayan region: Kullu-Manali, India

Cited by 17 publications

References 45 publications

Atmospheric Fine Mode Particulates at Eastern Himalaya, India: Role of Meteorology, Long-Range Transport and Local Anthropogenic Sources

Atmospheric Fine Mode Particulates at Eastern Himalaya, India: Role of Meteorology, Long-Range Transport and Local Anthropogenic Sources

Investigation of Aerosol Number Concentration at Gosan Site in Jeju, Korea

Simulation-aided characterization of a versatile water condensation particle counter for atmospheric airborne research

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