Then and Now: COVID-19 Pandemic Lockdown Misfire Atmospheric Methane over India
Abstract COVID-19 lockdown resulted in the revival of the environment due to reduced emissions of various pollutants globally. In particular, aerosols, NOx and SO2 showed significant reductions at most places. However, the greenhouse gases are not necessarily following this reduction everywhere. In...
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| Format: | Article |
| Language: | English |
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Springer
2022-03-01
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| Series: | Aerosol and Air Quality Research |
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| Online Access: | https://doi.org/10.4209/aaqr.210354 |
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| author | Manoj Hari Rajesh Kumar Sahu MS Shyam Sunder Bhishma Tyagi |
| author_facet | Manoj Hari Rajesh Kumar Sahu MS Shyam Sunder Bhishma Tyagi |
| author_sort | Manoj Hari |
| collection | DOAJ |
| description | Abstract COVID-19 lockdown resulted in the revival of the environment due to reduced emissions of various pollutants globally. In particular, aerosols, NOx and SO2 showed significant reductions at most places. However, the greenhouse gases are not necessarily following this reduction everywhere. In most areas, a decrease in NOx increases methane (CH4) concentration by enhancing the lifetime, but also results in decreased concentrations with reduced emissions. Analyzing the atmospheric CH4 variations during the COVID-19 lockdown over India is crucial as India is one of the regions with high seasonal variability of CH4. The present study has analyzed the tropospheric CH4 trends over India during the pre-monsoon season (March-May) for 2003-2021 using AIRS data. The study analyzed the lockdown variations (24 March-31 May) of tropospheric CH4 over India with the same period of 2019 and 2021 using TROPOMI to find the changes in CH4 concentrations over different regions of India due to lockdown. Our results capture the undeviating north (low)-south (high) gradient in the CH4 concentration with anticipated regional intensifications, likely, in the eastern and western coastal regions, with more comprehensive details than it ever has been presented before. |
| format | Article |
| id | doaj-art-190d960c10f546afbab68cd0cc7d7cf9 |
| institution | Kabale University |
| issn | 1680-8584 2071-1409 |
| language | English |
| publishDate | 2022-03-01 |
| publisher | Springer |
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| series | Aerosol and Air Quality Research |
| spelling | doaj-art-190d960c10f546afbab68cd0cc7d7cf92025-02-09T12:17:07ZengSpringerAerosol and Air Quality Research1680-85842071-14092022-03-0122411010.4209/aaqr.210354Then and Now: COVID-19 Pandemic Lockdown Misfire Atmospheric Methane over IndiaManoj Hari0Rajesh Kumar Sahu1MS Shyam Sunder2Bhishma Tyagi3Department of Earth and Atmospheric Sciences, National Institute of Technology RourkelaDepartment of Earth and Atmospheric Sciences, National Institute of Technology RourkelaDepartment of Earth and Atmospheric Sciences, National Institute of Technology RourkelaDepartment of Earth and Atmospheric Sciences, National Institute of Technology RourkelaAbstract COVID-19 lockdown resulted in the revival of the environment due to reduced emissions of various pollutants globally. In particular, aerosols, NOx and SO2 showed significant reductions at most places. However, the greenhouse gases are not necessarily following this reduction everywhere. In most areas, a decrease in NOx increases methane (CH4) concentration by enhancing the lifetime, but also results in decreased concentrations with reduced emissions. Analyzing the atmospheric CH4 variations during the COVID-19 lockdown over India is crucial as India is one of the regions with high seasonal variability of CH4. The present study has analyzed the tropospheric CH4 trends over India during the pre-monsoon season (March-May) for 2003-2021 using AIRS data. The study analyzed the lockdown variations (24 March-31 May) of tropospheric CH4 over India with the same period of 2019 and 2021 using TROPOMI to find the changes in CH4 concentrations over different regions of India due to lockdown. Our results capture the undeviating north (low)-south (high) gradient in the CH4 concentration with anticipated regional intensifications, likely, in the eastern and western coastal regions, with more comprehensive details than it ever has been presented before.https://doi.org/10.4209/aaqr.210354Atmospheric methaneNOxCOVID-19 lockdownSeasonal variabilityTROPOMI |
| spellingShingle | Manoj Hari Rajesh Kumar Sahu MS Shyam Sunder Bhishma Tyagi Then and Now: COVID-19 Pandemic Lockdown Misfire Atmospheric Methane over India Aerosol and Air Quality Research Atmospheric methane NOx COVID-19 lockdown Seasonal variability TROPOMI |
| title | Then and Now: COVID-19 Pandemic Lockdown Misfire Atmospheric Methane over India |
| title_full | Then and Now: COVID-19 Pandemic Lockdown Misfire Atmospheric Methane over India |
| title_fullStr | Then and Now: COVID-19 Pandemic Lockdown Misfire Atmospheric Methane over India |
| title_full_unstemmed | Then and Now: COVID-19 Pandemic Lockdown Misfire Atmospheric Methane over India |
| title_short | Then and Now: COVID-19 Pandemic Lockdown Misfire Atmospheric Methane over India |
| title_sort | then and now covid 19 pandemic lockdown misfire atmospheric methane over india |
| topic | Atmospheric methane NOx COVID-19 lockdown Seasonal variability TROPOMI |
| url | https://doi.org/10.4209/aaqr.210354 |
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