The Correlative study of Aerosol Optical Depth with Precipitable water over five AERONET station across the world
Ground-based measurements were taken at various locations, including Kathmandu Bode, Beijing, Gandhi College (located in South Asian zone, highly polluted area), Canberra, and UNC Gaitan (located in South Eastern zone, low polluted area), from January to December 2016. The study investigated the sea...
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Department of Physics, Mahendra Morang Adarsh Multiple Campus, Tribhuvan University
2023
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ftdoajarticles:oai:doaj.org/article:f0f7ceadaf4340e9a104d05533cad41e 2024-09-15T17:35:16+00:00 The Correlative study of Aerosol Optical Depth with Precipitable water over five AERONET station across the world Santosh Sapkota Sabin Gautam Aayush Gautam Bhairab Ale 2023-11-01T00:00:00Z https://doaj.org/article/f0f7ceadaf4340e9a104d05533cad41e EN eng Department of Physics, Mahendra Morang Adarsh Multiple Campus, Tribhuvan University https://nepjol.info/index.php/BIBECHANA/article/view/57153 https://doaj.org/toc/2091-0762 https://doaj.org/toc/2382-5340 2091-0762 2382-5340 https://doaj.org/article/f0f7ceadaf4340e9a104d05533cad41e Bibechana, Vol 20, Iss 3 (2023) Aerosol Aerosol Optical Depth Precipitable water Technology T Technology (General) T1-995 Science Q article 2023 ftdoajarticles 2024-08-05T17:49:30Z Ground-based measurements were taken at various locations, including Kathmandu Bode, Beijing, Gandhi College (located in South Asian zone, highly polluted area), Canberra, and UNC Gaitan (located in South Eastern zone, low polluted area), from January to December 2016. The study investigated the seasonal and inter-annual AOD that were obtained using CIMEL Sunphotometer, as a part of the Aerosol Robotic Network (AERONET). The data showed that Kathmandu (0.45±0.01), Gandhi College (0.45±0.02 and Beijing (0.85±0.03) had higher AOD values compared to other stations, with Kathmandu being a high-altitude site. The analysis found that pre-monsoon AOD were higher over Kathmandu (0.45±0.01), Gandhi College (0.45±0.02), UNC Gaitan (0.28±0.001), and Canberra (0.06±0.002). On the other hand, the monsoon AOD was higher over Beijing (0.85±0.03). The study identified various factors contributing to the higher AOD values in specific regions. Beijing, Gandhi College, and Kathmandu, located in Asian monsoon regions, experienced high aerosol loading due to economic activities, vehicles, urbanization, vegetation fire, land clearing for crop cultivation, as well as winter biomass burning, heating needs, and pollution from bricks kilns, factories, and vehicles. Canberra and UNC Gaitan had higher AOD values primarily due to biomass burning and dust. AOD values are higher for shorter wavelength and vice-versa. We conducted a correlation analysis between AOD and perceptible water at different wavelengths and observed one to one correspondence. The columnar water vapor (CWV) exhibited a high correlation with AOD in Canberra (Coefficient of determination, R2 = 0.61) at 1640 nm but had no relationship with AOD in Gandhi College (Coefficient of determination, R2 = 0) at 1640nm. There is weak negative correlation between AOD and preceptable water over Kathmandu and UNC Gaitan, but have positive correlation in Canberra, Beijing and Gandhi College Article in Journal/Newspaper Aerosol Robotic Network Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
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topic |
Aerosol Aerosol Optical Depth Precipitable water Technology T Technology (General) T1-995 Science Q |
spellingShingle |
Aerosol Aerosol Optical Depth Precipitable water Technology T Technology (General) T1-995 Science Q Santosh Sapkota Sabin Gautam Aayush Gautam Bhairab Ale The Correlative study of Aerosol Optical Depth with Precipitable water over five AERONET station across the world |
topic_facet |
Aerosol Aerosol Optical Depth Precipitable water Technology T Technology (General) T1-995 Science Q |
description |
Ground-based measurements were taken at various locations, including Kathmandu Bode, Beijing, Gandhi College (located in South Asian zone, highly polluted area), Canberra, and UNC Gaitan (located in South Eastern zone, low polluted area), from January to December 2016. The study investigated the seasonal and inter-annual AOD that were obtained using CIMEL Sunphotometer, as a part of the Aerosol Robotic Network (AERONET). The data showed that Kathmandu (0.45±0.01), Gandhi College (0.45±0.02 and Beijing (0.85±0.03) had higher AOD values compared to other stations, with Kathmandu being a high-altitude site. The analysis found that pre-monsoon AOD were higher over Kathmandu (0.45±0.01), Gandhi College (0.45±0.02), UNC Gaitan (0.28±0.001), and Canberra (0.06±0.002). On the other hand, the monsoon AOD was higher over Beijing (0.85±0.03). The study identified various factors contributing to the higher AOD values in specific regions. Beijing, Gandhi College, and Kathmandu, located in Asian monsoon regions, experienced high aerosol loading due to economic activities, vehicles, urbanization, vegetation fire, land clearing for crop cultivation, as well as winter biomass burning, heating needs, and pollution from bricks kilns, factories, and vehicles. Canberra and UNC Gaitan had higher AOD values primarily due to biomass burning and dust. AOD values are higher for shorter wavelength and vice-versa. We conducted a correlation analysis between AOD and perceptible water at different wavelengths and observed one to one correspondence. The columnar water vapor (CWV) exhibited a high correlation with AOD in Canberra (Coefficient of determination, R2 = 0.61) at 1640 nm but had no relationship with AOD in Gandhi College (Coefficient of determination, R2 = 0) at 1640nm. There is weak negative correlation between AOD and preceptable water over Kathmandu and UNC Gaitan, but have positive correlation in Canberra, Beijing and Gandhi College |
format |
Article in Journal/Newspaper |
author |
Santosh Sapkota Sabin Gautam Aayush Gautam Bhairab Ale |
author_facet |
Santosh Sapkota Sabin Gautam Aayush Gautam Bhairab Ale |
author_sort |
Santosh Sapkota |
title |
The Correlative study of Aerosol Optical Depth with Precipitable water over five AERONET station across the world |
title_short |
The Correlative study of Aerosol Optical Depth with Precipitable water over five AERONET station across the world |
title_full |
The Correlative study of Aerosol Optical Depth with Precipitable water over five AERONET station across the world |
title_fullStr |
The Correlative study of Aerosol Optical Depth with Precipitable water over five AERONET station across the world |
title_full_unstemmed |
The Correlative study of Aerosol Optical Depth with Precipitable water over five AERONET station across the world |
title_sort |
correlative study of aerosol optical depth with precipitable water over five aeronet station across the world |
publisher |
Department of Physics, Mahendra Morang Adarsh Multiple Campus, Tribhuvan University |
publishDate |
2023 |
url |
https://doaj.org/article/f0f7ceadaf4340e9a104d05533cad41e |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_source |
Bibechana, Vol 20, Iss 3 (2023) |
op_relation |
https://nepjol.info/index.php/BIBECHANA/article/view/57153 https://doaj.org/toc/2091-0762 https://doaj.org/toc/2382-5340 2091-0762 2382-5340 https://doaj.org/article/f0f7ceadaf4340e9a104d05533cad41e |
_version_ |
1810448636164702208 |