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The study on solar ultraviolet radiation (UVR) is essential for understanding the solar status of any location, which enables the determination of the level of exposure to solar UV radiation and the necessary precautions to be taken at that location. The measurement of solar UV radiation and its validation are increasingly prevalent worldwide, using various ground-based observations and satellite estimates. This paper compares the Ozone Monitoring Instrument (OMI)/Aura satellite solar ultraviolet index (UVI) with the ground-based UVI measurements at Biratnagar, Pokhara, Kathmandu, and Lukla in Nepal using data from 2009 to 2012. Trend analysis of UVI using moving averages, a box plot of overpass UVI and Total Ozone Column (TOC) to analyze their trends, and a scatter plot for comparison of OMI overpass UVI with ground-based UVI. Statistical tools were used to compare the datasets for UVI in all-sky conditions. The results show that satellite estimates tended to overestimate ground-based UVI levels, with a mean bias, relative bias, MAPE, RMSE, correlation coefficient, and standard deviation of error corresponding to 0.92, 1.9, 28.44, 1.6, 0.69, and 1.44 for UVI, respectively. The result also shows that the altitude effect is found to be (6.5-8.8) %/km approximately.

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Numerical analysis of factors causing long-term trends and annual variations of sulfur and nitrogen deposition amount in Japan from 2000 to 2020 Satoru Chatani, Hikari Shimadera, Kyo Kitayama, Kazuya Nishina p. 1-15
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Analysis of national air pollutant emissions in 2020 and re-estimation results for emissions from past years (2016–2019) Seongwoo Choi, Dongjae Lee, Yera Choi, Kwonhee Choi, Eunji Shin, Hyungcheon Kim, Myeonggeun Cha, Hyeongdo Song, Chul Yoo p. 1-29
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Neighborhood-level contamination and risks of child morbidity and mortality in Afghanistan Qurban Aliyar, Heman Das Lohano p. 1-11
Aggregate risk assessment of VOCs exposure in residents near Busan’s Sinpyeong and Jangrim industrial complexes Ji-Yun Jung, Jong-Won Kim, Tae-Woo Koo, Joon-Young Heo, Cheol-Min Lee p. 1-16
Temporal and seasonal variations in the frequency of high-concentration precipitation samples at EANET sites in Japan : 20 years of daily wet deposition data Yuhei Kato, Tsuyoshi Ohizumi, Makoto Nakata, Hiroyuki Sase p. 1-15
Seasonal variation and temperature-dependent emission of volatile organic compounds from a commercial swine shed in Japan Nobuyuki Tanaka, Kaho Nishimura, Akane Miyazaki, Hiroshi Hayami p. 1-10
Microplastics and health hazards : gastrointestinal risk assessment across a multi-species perspective Shiv Basant Kumar, Jey Kumar Pachiyappan, Sudharsanavasan Chandrasekar, Veera Venkata Satyanarayana Reddy Karri, Praveen Thaggikuppe Krishnamurthy, Jawahar Natarajan, Thava Palaniami, Gowthamarajan Kuppusamy p. 1-17
Black carbon and its radiative effect with role in urban heat island (UHI) over India : a review Sunayana, Nahar Singh, Papiya Mandal p. 1-23
(A) new hybrid multivariate prediction model based on wavelet transform convolution for PM2.5 prediction Xinbiao Lu, Wentao Zhang, Gaofan Zhan, Wen Wu, Changjiang Han, Xiaolong Wu p. 1-15
Peroxide concentrations measured over a rural site in the Hokuriku district, coastal region of the Sea of Japan, central Japan, during early summer using a helicopter Koichi Watanabe, Nanami Maki, Michiyo Chatani, Chisato Maki, Ayami Nakanishi, Yuki Wasada, Taisei Akahori, Ryoga Ono, Yuta Yamazaki, Chiharu Mori p. 1-9
Comparative analysis of polycyclic aromatic sulfur heterocycles (PASHs) in PM2.5 from Xi’an, China and Yokohama, Japan : pollution characteristics and source attribution Kaixu Chen, Weidong Jing, Zhenxing Shen, Tomoaki Okuda p. 1-17
Nighttime waste wood burning and its impact on urban air quality : multi-year measurements in central Seoul, Gwanghwamun, South Korea Chaehyeong Park, Seoyeong Choe, Min Young Song, SungKyun Shin, Hajeong Jeon, Dong-Hoon Ko, Myoungki Song, Min-Suk Bae p. 1-11
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(A) comparative study of the UV index between OMI and ground-based measurements in Nepal Umakant L. Karna, Khem N. Poudyal, Babu R. Tiwari, Binod K. Bhattarai p. 1-11
Emissions of volatile organic compounds from a commercial hen shed in Japan Nobuyuki Tanaka, Nanami Hanari, Ayumi Takahara, Akane Miyazaki, Genki Katata, Hisao Kuroda p. 1-10
Dispersion of PM2.5 particles emitted by the waste dump fire in the city of Guanajuato, Mexico Adrián Zamorategui-Molina, Gilberto Álvarez Guzmán, Marcos Irineo Esquivel Longoria, Juan Carlos Baltazar Vera, Alma Hortensia Serafín Muñoz p. 1-15
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