Effect of Future Climate Change on Stratosphere-to-Troposphere-Exchange Driven Ozone in the Northern Hemisphere
Abstract Future estimates of atmospheric pollutant concentrations serve as critical information for policy makers to formulate current policy indicators to achieve future targets. Tropospheric burden of O3 is modulated not only by anthropogenic and natural precursor emissions, but also by the downwa...
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| Format: | Article |
| Language: | English |
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Springer
2023-09-01
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| Series: | Aerosol and Air Quality Research |
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| Online Access: | https://doi.org/10.4209/aaqr.220414 |
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| author | Shovan Kumar Sahu Lei Chen Song Liu Jia Xing Rohit Mathur |
| author_facet | Shovan Kumar Sahu Lei Chen Song Liu Jia Xing Rohit Mathur |
| author_sort | Shovan Kumar Sahu |
| collection | DOAJ |
| description | Abstract Future estimates of atmospheric pollutant concentrations serve as critical information for policy makers to formulate current policy indicators to achieve future targets. Tropospheric burden of O3 is modulated not only by anthropogenic and natural precursor emissions, but also by the downward transport of O3 associated with stratosphere to troposphere exchange (STE). Hence changes in the estimates of STE and its contributions are key to understand the nature and intensity of future ground level O3 concentrations. The difference in simulated O3 mixing ratios with and without the O3-Potential Vorticity (PV) parameterization scheme is used to represent the model estimated influence of STE on tropospheric O3 distributions. Though STE contributions remain constant in Northern hemisphere as a whole, regional differences exist with Europe (EUR) registering increased STE contribution in both spring and winter while Eastern China (ECH) reporting increased contribution in spring in 2050 (RCP8.5) as compared to 2015. Importance of climate change can be deduced from the fact that ECH and EUR recorded increased STE contribution to O3 in RCP8.5 compared to RCP4.5. Comparison of STE and non-STE meteorological process contributions to O3 due to climate change revealed that contributions of non-STE processes were highest in summer while STE contributions were highest in winter. EUR reported highest STE contribution while ECH reported highest non-STE contribution. None of the 3 regions show consistent low STE contribution due to future climate change (< 50%) in all seasons indicating the significance of STE to ground level O3. |
| format | Article |
| id | doaj-art-a20e1696fe1243deb323964ad5438dde |
| institution | Kabale University |
| issn | 1680-8584 2071-1409 |
| language | English |
| publishDate | 2023-09-01 |
| publisher | Springer |
| record_format | Article |
| series | Aerosol and Air Quality Research |
| spelling | doaj-art-a20e1696fe1243deb323964ad5438dde2025-02-09T12:23:13ZengSpringerAerosol and Air Quality Research1680-85842071-14092023-09-01231211510.4209/aaqr.220414Effect of Future Climate Change on Stratosphere-to-Troposphere-Exchange Driven Ozone in the Northern HemisphereShovan Kumar Sahu0Lei Chen1Song Liu2Jia Xing3Rohit Mathur4Centre for Climate Research Singapore, Meteorological Service SingaporeState Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua UniversityState Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua UniversityState Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua UniversityThe U.S. Environmental Protection AgencyAbstract Future estimates of atmospheric pollutant concentrations serve as critical information for policy makers to formulate current policy indicators to achieve future targets. Tropospheric burden of O3 is modulated not only by anthropogenic and natural precursor emissions, but also by the downward transport of O3 associated with stratosphere to troposphere exchange (STE). Hence changes in the estimates of STE and its contributions are key to understand the nature and intensity of future ground level O3 concentrations. The difference in simulated O3 mixing ratios with and without the O3-Potential Vorticity (PV) parameterization scheme is used to represent the model estimated influence of STE on tropospheric O3 distributions. Though STE contributions remain constant in Northern hemisphere as a whole, regional differences exist with Europe (EUR) registering increased STE contribution in both spring and winter while Eastern China (ECH) reporting increased contribution in spring in 2050 (RCP8.5) as compared to 2015. Importance of climate change can be deduced from the fact that ECH and EUR recorded increased STE contribution to O3 in RCP8.5 compared to RCP4.5. Comparison of STE and non-STE meteorological process contributions to O3 due to climate change revealed that contributions of non-STE processes were highest in summer while STE contributions were highest in winter. EUR reported highest STE contribution while ECH reported highest non-STE contribution. None of the 3 regions show consistent low STE contribution due to future climate change (< 50%) in all seasons indicating the significance of STE to ground level O3.https://doi.org/10.4209/aaqr.220414STEO3Northern hemisphereFuture scenariosRCP4.5RCP8.5 |
| spellingShingle | Shovan Kumar Sahu Lei Chen Song Liu Jia Xing Rohit Mathur Effect of Future Climate Change on Stratosphere-to-Troposphere-Exchange Driven Ozone in the Northern Hemisphere Aerosol and Air Quality Research STE O3 Northern hemisphere Future scenarios RCP4.5 RCP8.5 |
| title | Effect of Future Climate Change on Stratosphere-to-Troposphere-Exchange Driven Ozone in the Northern Hemisphere |
| title_full | Effect of Future Climate Change on Stratosphere-to-Troposphere-Exchange Driven Ozone in the Northern Hemisphere |
| title_fullStr | Effect of Future Climate Change on Stratosphere-to-Troposphere-Exchange Driven Ozone in the Northern Hemisphere |
| title_full_unstemmed | Effect of Future Climate Change on Stratosphere-to-Troposphere-Exchange Driven Ozone in the Northern Hemisphere |
| title_short | Effect of Future Climate Change on Stratosphere-to-Troposphere-Exchange Driven Ozone in the Northern Hemisphere |
| title_sort | effect of future climate change on stratosphere to troposphere exchange driven ozone in the northern hemisphere |
| topic | STE O3 Northern hemisphere Future scenarios RCP4.5 RCP8.5 |
| url | https://doi.org/10.4209/aaqr.220414 |
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