Stratospheric contribution to the summertime high surface ozone events over the western united states
The stratospheric influence on summertime high surface ozone ( $\mathrm{O_3}$ ) events is examined using a twenty-year simulation from the Whole Atmosphere Community Climate Model. We find that $\mathrm{O_3}$ transported from the stratosphere makes a significant contribution to the surface $\mathrm{...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2020-01-01
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| Series: | Environmental Research Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1748-9326/abba53 |
| _version_ | 1797747735142596608 |
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| author | Xinyue Wang Yutian Wu William Randel Simone Tilmes |
| author_facet | Xinyue Wang Yutian Wu William Randel Simone Tilmes |
| author_sort | Xinyue Wang |
| collection | DOAJ |
| description | The stratospheric influence on summertime high surface ozone ( $\mathrm{O_3}$ ) events is examined using a twenty-year simulation from the Whole Atmosphere Community Climate Model. We find that $\mathrm{O_3}$ transported from the stratosphere makes a significant contribution to the surface $\mathrm{O_3}$ variability where background surface $\mathrm{O_3}$ exceeds the 95 th percentile, especially over western U.S. Maximum covariance analysis is applied to $\mathrm{O_3}$ anomalies paired with stratospheric $\mathrm{O_3}$ tracer anomalies to identify the stratospheric intrusion and the underlying dynamical mechanism. The first leading mode corresponds to deep stratospheric intrusions in the western and northern tier of the U.S., and intensified northeasterlies in the mid-to-lower troposphere along the west coast, which also facilitate the transport to the eastern Pacific Ocean. The second leading mode corresponds to deep intrusions over the Intermountain Regions. Both modes are associated with eastward propagating baroclinic systems, which are amplified near the end of the North Pacific storm tracks, leading to strong descents over the western U.S. |
| first_indexed | 2024-03-12T15:54:52Z |
| format | Article |
| id | doaj.art-8d42194513934dfc8579432c5353f248 |
| institution | Directory Open Access Journal |
| issn | 1748-9326 |
| language | English |
| last_indexed | 2024-03-12T15:54:52Z |
| publishDate | 2020-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Environmental Research Letters |
| spelling | doaj.art-8d42194513934dfc8579432c5353f2482023-08-09T14:57:46ZengIOP PublishingEnvironmental Research Letters1748-93262020-01-0115101040a610.1088/1748-9326/abba53Stratospheric contribution to the summertime high surface ozone events over the western united statesXinyue Wang0https://orcid.org/0000-0003-1848-1933Yutian Wu1William Randel2Simone Tilmes3Department of Earth, Atmospheric, and Planetary Sciences, Purdue University , West Lafayette, IN, United States of America; Atmospheric Chemistry, Observations and Modeling Laboratory, National Center for Atmospheric Research , Boulder, CO, United States of AmericaLamont-Doherty Earth Observatory of Columbia University , Palisades, NY, United States of AmericaAtmospheric Chemistry, Observations and Modeling Laboratory, National Center for Atmospheric Research , Boulder, CO, United States of AmericaAtmospheric Chemistry, Observations and Modeling Laboratory, National Center for Atmospheric Research , Boulder, CO, United States of AmericaThe stratospheric influence on summertime high surface ozone ( $\mathrm{O_3}$ ) events is examined using a twenty-year simulation from the Whole Atmosphere Community Climate Model. We find that $\mathrm{O_3}$ transported from the stratosphere makes a significant contribution to the surface $\mathrm{O_3}$ variability where background surface $\mathrm{O_3}$ exceeds the 95 th percentile, especially over western U.S. Maximum covariance analysis is applied to $\mathrm{O_3}$ anomalies paired with stratospheric $\mathrm{O_3}$ tracer anomalies to identify the stratospheric intrusion and the underlying dynamical mechanism. The first leading mode corresponds to deep stratospheric intrusions in the western and northern tier of the U.S., and intensified northeasterlies in the mid-to-lower troposphere along the west coast, which also facilitate the transport to the eastern Pacific Ocean. The second leading mode corresponds to deep intrusions over the Intermountain Regions. Both modes are associated with eastward propagating baroclinic systems, which are amplified near the end of the North Pacific storm tracks, leading to strong descents over the western U.S.https://doi.org/10.1088/1748-9326/abba53stratospheric intrusionbaroclinic wavesnorth pacific storm trackstratosphere-troposphere exchange |
| spellingShingle | Xinyue Wang Yutian Wu William Randel Simone Tilmes Stratospheric contribution to the summertime high surface ozone events over the western united states Environmental Research Letters stratospheric intrusion baroclinic waves north pacific storm track stratosphere-troposphere exchange |
| title | Stratospheric contribution to the summertime high surface ozone events over the western united states |
| title_full | Stratospheric contribution to the summertime high surface ozone events over the western united states |
| title_fullStr | Stratospheric contribution to the summertime high surface ozone events over the western united states |
| title_full_unstemmed | Stratospheric contribution to the summertime high surface ozone events over the western united states |
| title_short | Stratospheric contribution to the summertime high surface ozone events over the western united states |
| title_sort | stratospheric contribution to the summertime high surface ozone events over the western united states |
| topic | stratospheric intrusion baroclinic waves north pacific storm track stratosphere-troposphere exchange |
| url | https://doi.org/10.1088/1748-9326/abba53 |
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