A study of nitrogen dioxide (NO2) periodicity over the United Arab Emirates using wavelet analysis
Abstract NO2 and nitric oxide (NO) are the most reactive gases in the atmosphere. The interaction of NOx molecules with oxygen, water and other chemicals leads to the formation of acid rain. The presence of NO2 in the air affects human health and forms a photochemical smog. In this study, we utilize...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2022-10-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-21937-3 |
| _version_ | 1828316815840772096 |
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| author | Aishah Al Yammahi Zeyar Aung |
| author_facet | Aishah Al Yammahi Zeyar Aung |
| author_sort | Aishah Al Yammahi |
| collection | DOAJ |
| description | Abstract NO2 and nitric oxide (NO) are the most reactive gases in the atmosphere. The interaction of NOx molecules with oxygen, water and other chemicals leads to the formation of acid rain. The presence of NO2 in the air affects human health and forms a photochemical smog. In this study, we utilize wavelet analysis, namely, the Morlet wavelet, which is a type of continuous wavelet transform, to conduct a spectral analysis of the periodicity of nitrogen dioxide (NO2). The study is conducted using data from 14 weather stations located in diverse geographic areas of the United Arab Emirates (UAE) over a period of two years (2019 and 2020). We explain and relate the significance of human activities to the concentration level of NO2, particularly considering the effect of the COVID-19 lockdown to the periodicity of NO2. The results show that NO2 concentrations in desert areas such as Liwa and Al Quaa were unaffected by the lockdown period (April–July 2020) resulting from the COVID-19 pandemic. The other stations in the urban areas of Abu Dhabi city, Al Dhafra and Al Ain, showed a reduction in NO2 during the lockdown. NO2 is more highly concentrated during winter seasons than during other seasons. The periodicity of NO2 lasted from a few days up to 16 days in most regions. However, some stations located in the Al Dhafra region, such as Al Ruwais and the Gayathi School stations, exhibited a longer period of more than 32 days with a 0.05 significance test. In the Abu Dhabi region, NO2 lasted between 64 and 128 days at the Al Mafraq station. The correlation between the NO2 concentration across several ground stations was studied using wavelet coherence. |
| first_indexed | 2024-04-13T17:20:08Z |
| format | Article |
| id | doaj.art-1760bf0516ff42119f79456fec590b35 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-13T17:20:08Z |
| publishDate | 2022-10-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-1760bf0516ff42119f79456fec590b352022-12-22T02:38:00ZengNature PortfolioScientific Reports2045-23222022-10-0112111110.1038/s41598-022-21937-3A study of nitrogen dioxide (NO2) periodicity over the United Arab Emirates using wavelet analysisAishah Al Yammahi0Zeyar Aung1Khalifa University of Science and TechnologyKhalifa University of Science and TechnologyAbstract NO2 and nitric oxide (NO) are the most reactive gases in the atmosphere. The interaction of NOx molecules with oxygen, water and other chemicals leads to the formation of acid rain. The presence of NO2 in the air affects human health and forms a photochemical smog. In this study, we utilize wavelet analysis, namely, the Morlet wavelet, which is a type of continuous wavelet transform, to conduct a spectral analysis of the periodicity of nitrogen dioxide (NO2). The study is conducted using data from 14 weather stations located in diverse geographic areas of the United Arab Emirates (UAE) over a period of two years (2019 and 2020). We explain and relate the significance of human activities to the concentration level of NO2, particularly considering the effect of the COVID-19 lockdown to the periodicity of NO2. The results show that NO2 concentrations in desert areas such as Liwa and Al Quaa were unaffected by the lockdown period (April–July 2020) resulting from the COVID-19 pandemic. The other stations in the urban areas of Abu Dhabi city, Al Dhafra and Al Ain, showed a reduction in NO2 during the lockdown. NO2 is more highly concentrated during winter seasons than during other seasons. The periodicity of NO2 lasted from a few days up to 16 days in most regions. However, some stations located in the Al Dhafra region, such as Al Ruwais and the Gayathi School stations, exhibited a longer period of more than 32 days with a 0.05 significance test. In the Abu Dhabi region, NO2 lasted between 64 and 128 days at the Al Mafraq station. The correlation between the NO2 concentration across several ground stations was studied using wavelet coherence.https://doi.org/10.1038/s41598-022-21937-3 |
| spellingShingle | Aishah Al Yammahi Zeyar Aung A study of nitrogen dioxide (NO2) periodicity over the United Arab Emirates using wavelet analysis Scientific Reports |
| title | A study of nitrogen dioxide (NO2) periodicity over the United Arab Emirates using wavelet analysis |
| title_full | A study of nitrogen dioxide (NO2) periodicity over the United Arab Emirates using wavelet analysis |
| title_fullStr | A study of nitrogen dioxide (NO2) periodicity over the United Arab Emirates using wavelet analysis |
| title_full_unstemmed | A study of nitrogen dioxide (NO2) periodicity over the United Arab Emirates using wavelet analysis |
| title_short | A study of nitrogen dioxide (NO2) periodicity over the United Arab Emirates using wavelet analysis |
| title_sort | study of nitrogen dioxide no2 periodicity over the united arab emirates using wavelet analysis |
| url | https://doi.org/10.1038/s41598-022-21937-3 |
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