On the Identification of Ozone Recovery
As ozone depleting substances decline, stratospheric ozone is displaying signs of healing in the Antarctic lower stratosphere. Here we focus on higher altitudes and the global stratosphere. Two key processes that can influence ozone recovery are evaluated: dynamical variability and solar proton even...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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American Geophysical Union (AGU)
2019
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| Online Access: | https://hdl.handle.net/1721.1/122774 |
| _version_ | 1826190840863653888 |
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| author | Stone, Kane Adam Solomon, Susan Kinnison, Douglas E. |
| 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 Stone, Kane Adam Solomon, Susan Kinnison, Douglas E. |
| author_sort | Stone, Kane Adam |
| collection | MIT |
| description | As ozone depleting substances decline, stratospheric ozone is displaying signs of healing in the Antarctic lower stratosphere. Here we focus on higher altitudes and the global stratosphere. Two key processes that can influence ozone recovery are evaluated: dynamical variability and solar proton events (SPEs). A nine‐member ensemble of free‐running simulations indicates that dynamical variability dominates the relatively small ozone recovery signal over 1998–2016 in the subpolar lower stratosphere, particularly near the tropical tropopause. The absence of observed recovery there to date is therefore not unexpected. For the upper stratosphere, high latitudes (50–80°N/S) during autumn and winter show the largest recovery. Large halogen‐induced odd oxygen loss there provides a fingerprint of seasonal sensitivity to chlorine trends. However, we show that SPEs also have a profound effect on ozone trends within this region since 2000. Thus, accounting for SPEs is important for detection of recovery in the upper stratosphere. Keywords: ozone; recovery; stratosphere; variability |
| first_indexed | 2024-09-23T08:46:28Z |
| format | Article |
| id | mit-1721.1/122774 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T08:46:28Z |
| publishDate | 2019 |
| publisher | American Geophysical Union (AGU) |
| record_format | dspace |
| spelling | mit-1721.1/1227742022-09-23T14:27:17Z On the Identification of Ozone Recovery Stone, Kane Adam Solomon, Susan Kinnison, Douglas E. Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Massachusetts Institute of Technology. Department of Chemistry Solomon, Susan As ozone depleting substances decline, stratospheric ozone is displaying signs of healing in the Antarctic lower stratosphere. Here we focus on higher altitudes and the global stratosphere. Two key processes that can influence ozone recovery are evaluated: dynamical variability and solar proton events (SPEs). A nine‐member ensemble of free‐running simulations indicates that dynamical variability dominates the relatively small ozone recovery signal over 1998–2016 in the subpolar lower stratosphere, particularly near the tropical tropopause. The absence of observed recovery there to date is therefore not unexpected. For the upper stratosphere, high latitudes (50–80°N/S) during autumn and winter show the largest recovery. Large halogen‐induced odd oxygen loss there provides a fingerprint of seasonal sensitivity to chlorine trends. However, we show that SPEs also have a profound effect on ozone trends within this region since 2000. Thus, accounting for SPEs is important for detection of recovery in the upper stratosphere. Keywords: ozone; recovery; stratosphere; variability National Science Foundation (Grant ACD-1539972) 2019-11-05T16:34:18Z 2019-11-05T16:34:18Z 2018-05 2018-05 Article http://purl.org/eprint/type/JournalArticle 0094-8276 https://hdl.handle.net/1721.1/122774 Stone, Kane A. et al. “On the Identification of Ozone Recovery.” Geophysical Research Letters 45, 10 (May 2018): 5158–5165 © 2018 American Geophysical Union en_US http://dx.doi.org/10.1029/2018gl077955 Geophysical Research Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf application/pdf American Geophysical Union (AGU) Prof. Solomon via Chris Sherratt |
| spellingShingle | Stone, Kane Adam Solomon, Susan Kinnison, Douglas E. On the Identification of Ozone Recovery |
| title | On the Identification of Ozone Recovery |
| title_full | On the Identification of Ozone Recovery |
| title_fullStr | On the Identification of Ozone Recovery |
| title_full_unstemmed | On the Identification of Ozone Recovery |
| title_short | On the Identification of Ozone Recovery |
| title_sort | on the identification of ozone recovery |
| url | https://hdl.handle.net/1721.1/122774 |
| work_keys_str_mv | AT stonekaneadam ontheidentificationofozonerecovery AT solomonsusan ontheidentificationofozonerecovery AT kinnisondouglase ontheidentificationofozonerecovery |