Quantifying the Imprints of Stratospheric Contributions to Interhemispheric Differences in Tropospheric CFC‐11, CFC‐12, and N 2 O Abundances
For trace gases destroyed in the stratosphere, mass flux across the tropopause can substantially influence observed surface hemispheric differences (NH-SH). Here, we quantify associations between observed stratospheric and tropospheric NH-SH growth rate anomalies of CFC-11, CFC-12, and N2O. We emplo...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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American Geophysical Union (AGU)
2022
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| Online Access: | https://hdl.handle.net/1721.1/140433 |
| _version_ | 1811094124814663680 |
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| author | Lickley, Megan Solomon, Susan Kinnison, Doug Krummel, Paul Mühle, Jens O'Doherty, Simon Prinn, Ronald Rigby, Matthew Stone, Kane A. Wang, Peidong Weiss, Ray Young, Dickon |
| author2 | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences |
| author_facet | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Lickley, Megan Solomon, Susan Kinnison, Doug Krummel, Paul Mühle, Jens O'Doherty, Simon Prinn, Ronald Rigby, Matthew Stone, Kane A. Wang, Peidong Weiss, Ray Young, Dickon |
| author_sort | Lickley, Megan |
| collection | MIT |
| description | For trace gases destroyed in the stratosphere, mass flux across the tropopause can substantially influence observed surface hemispheric differences (NH-SH). Here, we quantify associations between observed stratospheric and tropospheric NH-SH growth rate anomalies of CFC-11, CFC-12, and N2O. We employ a chemistry climate model along with satellite and global surface station observations. Our model explains 60% of observed N2O NH-SH growth rate variability from 2005 to 2019, compared to 30% for CFC-11% and 40% for CFC-12, supporting evidence that unexpected anthropogenic emissions caused sustained positive NH-SH anomalies in these CFCs from 2012 to 2017. Between 2012 and 2015, the observed CFC-11 NH-SH difference grew by 1.7 ppt; our model explains 0.5 ± 0.1 ppt of this growth, but not the duration. Our model suggests that in the absence of further emission anomalies, new NH-SH positive tracer anomalies should have occurred in 2020, and predicts small negative anomalies in 2021. |
| first_indexed | 2024-09-23T15:55:28Z |
| format | Article |
| id | mit-1721.1/140433 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T15:55:28Z |
| publishDate | 2022 |
| publisher | American Geophysical Union (AGU) |
| record_format | dspace |
| spelling | mit-1721.1/1404332024-06-06T20:12:27Z Quantifying the Imprints of Stratospheric Contributions to Interhemispheric Differences in Tropospheric CFC‐11, CFC‐12, and N 2 O Abundances Lickley, Megan Solomon, Susan Kinnison, Doug Krummel, Paul Mühle, Jens O'Doherty, Simon Prinn, Ronald Rigby, Matthew Stone, Kane A. Wang, Peidong Weiss, Ray Young, Dickon Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Massachusetts Institute of Technology. Center for Global Change Science For trace gases destroyed in the stratosphere, mass flux across the tropopause can substantially influence observed surface hemispheric differences (NH-SH). Here, we quantify associations between observed stratospheric and tropospheric NH-SH growth rate anomalies of CFC-11, CFC-12, and N2O. We employ a chemistry climate model along with satellite and global surface station observations. Our model explains 60% of observed N2O NH-SH growth rate variability from 2005 to 2019, compared to 30% for CFC-11% and 40% for CFC-12, supporting evidence that unexpected anthropogenic emissions caused sustained positive NH-SH anomalies in these CFCs from 2012 to 2017. Between 2012 and 2015, the observed CFC-11 NH-SH difference grew by 1.7 ppt; our model explains 0.5 ± 0.1 ppt of this growth, but not the duration. Our model suggests that in the absence of further emission anomalies, new NH-SH positive tracer anomalies should have occurred in 2020, and predicts small negative anomalies in 2021. 2022-02-16T18:36:38Z 2022-02-16T18:36:38Z 2021-07-15 Article http://purl.org/eprint/type/JournalArticle 0094-8276 1944-8007 https://hdl.handle.net/1721.1/140433 Lickley, M., Solomon, S., Kinnison, D., Krummel, P., Mühle, J., O’Doherty, S., et al. (2021). Quantifying the imprints of stratospheric contributions to interhemispheric differences in tropospheric CFC-11, CFC-12, and N2O abundances. Geophysical Research Letters, 48, e2021GL093700. en http://dx.doi.org/10.1029/2021gl093700 Geophysical Research Letters Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf American Geophysical Union (AGU) Wiley |
| spellingShingle | Lickley, Megan Solomon, Susan Kinnison, Doug Krummel, Paul Mühle, Jens O'Doherty, Simon Prinn, Ronald Rigby, Matthew Stone, Kane A. Wang, Peidong Weiss, Ray Young, Dickon Quantifying the Imprints of Stratospheric Contributions to Interhemispheric Differences in Tropospheric CFC‐11, CFC‐12, and N 2 O Abundances |
| title | Quantifying the Imprints of Stratospheric Contributions to Interhemispheric Differences in Tropospheric CFC‐11, CFC‐12, and N 2 O Abundances |
| title_full | Quantifying the Imprints of Stratospheric Contributions to Interhemispheric Differences in Tropospheric CFC‐11, CFC‐12, and N 2 O Abundances |
| title_fullStr | Quantifying the Imprints of Stratospheric Contributions to Interhemispheric Differences in Tropospheric CFC‐11, CFC‐12, and N 2 O Abundances |
| title_full_unstemmed | Quantifying the Imprints of Stratospheric Contributions to Interhemispheric Differences in Tropospheric CFC‐11, CFC‐12, and N 2 O Abundances |
| title_short | Quantifying the Imprints of Stratospheric Contributions to Interhemispheric Differences in Tropospheric CFC‐11, CFC‐12, and N 2 O Abundances |
| title_sort | quantifying the imprints of stratospheric contributions to interhemispheric differences in tropospheric cfc 11 cfc 12 and n 2 o abundances |
| url | https://hdl.handle.net/1721.1/140433 |
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