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High Density Study of Vaporiser before Mansoon Weather for Density Dependent Parameter |
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| Paper Id :
18233 Submission Date :
2023-09-15 Acceptance Date :
2023-09-21 Publication Date :
2023-09-25
This is an open-access research paper/article distributed under the terms of the Creative Commons Attribution 4.0 International, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. DOI:10.5281/zenodo.10113093 For verification of this paper, please visit on
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| Abstract |
Aerosol characteristics over Mohania region during premonsoon (March - May) period were analyzed for year 2016. Aerosol optical properties and angstrom exponent were measured using MICROTOPS-II Sunphotometer. The mean AOD for the period of study was found to be 0.78 where as mean angstrom exponent (AE at 440 - 870 nm) was found to be 0.30. Average concentrations of PM2.4 was found to be 124.10 µg/m3 respectively, which clearly demonstrates dominance of coarse mode particles particularly in this season. |
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| Keywords | High Density Study of Vaporiser, Mansoon, Weather, Density, Dependent, Parameter. | ||||||
| Introduction |
Atmospheric aerosols play an important role in earth’s radiation budget and which further causes implications to regional climate [1, 2]. Assessment of effect of aerosols on climate requires not only the knowledge of its regional and global distribution but its various properties [3]. Thus it becomes important to improve aerosol characterization on regional basis with high spatial and temporal resolutions. |
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| Objective of study |
The study has been carried out using MICROTOPS II Sunphotometer and two High volume samplers (PM10 and PM2.5. during March to May 2016 over Mohania. |
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| Review of Literature |
The Indo-Gangetic basin (IGB) is one of the highly populated regions in the world, where high concentration of population live and are exposed to enormous pollution produced by various natural and anthropogenic sources [4, 5]. This region experiences emissions of various anthropogenic and natural aerosols throughout the year [6]. Moreover, during pre-monsoon or summer seasons, IGB receives heavier loads of natural dust aerosols, transported from the neighboring Desert regions (Thar Desert) of western Rajasthan in India [7]. |
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| Analysis |
The study site Mohania represents (25°28′ N and 82°97′ E; 82.2 m AMSL) an urban environmental location over central part of IGB characterized by multiple sources of aerosol loading throughout the year. The present study involves MICROTOPS-II Sunphotometer manufactured by Sun light company limited USA and two high volume samplers manufactured by Envirotech private ltd., India. The MICROTOPS-II sun-photometer is a portable hand held sun-photometer for direct solar irradiance measurement in different wavelengths of 440, 500, 675, 870 and 936 nm. The hourly data of Aerosol Optical Thickness at 500 nm had been taken during the period of study over Varanasi at our Department of Physics, Institute of Science, Banaras Hindu University, India. The high volume samplers were deployed at terrace of the Department at height of approximately 8 feet. |
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| Result and Discussion |
Aerosol optical depth and angstrom exponent are two very important parameters to study aerosol properties which are analogous to Angstrom power law and related to each other by expression given as τλ = βλ-α where, τλ, is AOD at the wavelength λ, β is the turbidity coefficient which is equal to AOD at λ = 1µm and α is the AE. Enhanced AOD was observed during the month of April, May and June of the particular which is shown in Figure 1. Average AOD for the entire period of study was found to be 0.78. Variation of AE represents that there are different types of aerosols present over the region during the measurement period of pre-monsoon season, which may be due to day-to-day variability in weather conditions and emission factors. During pre-monsoon season, enhancement in AOD is attributed to aerosol loading due to dust-storm events coming from far source region, Arabian Peninsula and African regions. There is an increasing trend in AOD from April to June at the Authorized licensed use limited to: University of Exeter. Downloaded on June 20,2020 at 20:46:34 UTC from IEEE Xplore. Restrictions apply. location during pre- monsoon, which may be due to dust storm and anthropogenic aerosol sources [4] depicts variation in concentrations of particulate matter of both types over the Varanasi. Figure 1. Variation of AOD during the month of April, May and June 2017.
Figure: 1
Figure:2 |
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| Conclusion |
Figure 2. Variation in concentrations of particulate matter of PM2.5 and PM10 over Varanasi. On the other hand the average concentrations of PM and PM10 were found to be 38.15±22.48 and 126.10±45.39 µg/m3 respectively, which also confirms dominance of coarse mode particles in ambient air which may be attributed to occurrence of several dust storm events in this season which bring lot of transported dust with them. 4. Acknowledgements The author Vineet Pratap is thankful to UGC for providing the financial assistance in form of fellowship. Work is partially supported by ISRO, Bangalore under ISRO-SSPS program and partially by UGC, New Delhi under MRP program. Pradeep Kumar acknowledge to 0 50 100 150 200 250 05- 04-2017 05-05-2017 05-06-2017 PM2.5 PM10 monsoon, which may be due to dust anthropogenic aerosol sources [4]. Figure 2 depicts variation in concentrations of particulate matter of during the month of April, ariation in concentrations of particulate matter he average concentrations of PM2.5 were found to be 38.15 and respectively, which also confirms dominance of coarse mode particles in ambient air which may be attributed to occurrence of several dust storm. |
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| References |
1. A. Choudhary, S. Gokhale, A. Shukla,
K. Singh, “Variability in Emission Rate of AutoRickshaw Based on Real World
Driving Profile: A Case Study in Guwahati City. URSI APDelhi, India, 09 - 15 March 2019.
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