Observed changes in Brewer–Dobson circulation for 1980–2018
Previous work has examined the Brewer–Dobson circulation (BDC) changes for 1980–2009 based on satellite Microwave Sounding Unit (MSU/AMSU) lower-stratospheric temperature (T LS ) observations and ERA-Interim reanalysis data. Here we examine the BDC changes for the longer period now available (1980–2...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2020
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| Online Access: | https://hdl.handle.net/1721.1/124664 |
| _version_ | 1811069797386944512 |
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| author | Solomon, Susan |
| 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 Solomon, Susan |
| author_sort | Solomon, Susan |
| collection | MIT |
| description | Previous work has examined the Brewer–Dobson circulation (BDC) changes for 1980–2009 based on satellite Microwave Sounding Unit (MSU/AMSU) lower-stratospheric temperature (T LS ) observations and ERA-Interim reanalysis data. Here we examine the BDC changes for the longer period now available (1980–2018), which also allows analysis of both the ozone depletion (1980–1999) and ozone healing (2000–2018) periods. We provide observational evidence that the annual mean BDC accelerated for 1980–1999 but decelerated for 2000–2018, with the changes largely driven by the Southern Hemisphere (SH), which might be partly contributed by the effects of ozone depletion and healing. We also show that the annual mean BDC has accelerated in the last 40 years (at the 90% confidence level) with a relative strengthening of ~1.7% per decade. This overall acceleration was driven by both Northern Hemisphere (40%) and SH (60%) cells. Significant SH radiative warming is also identified in September for 2000–2018 after excluding the year 2002 when a very rare SH stratospheric sudden warming occurred, supporting the view that healing of the Antarctic ozone layer has now begun to occur during the month of September. ©2019 |
| first_indexed | 2024-09-23T08:16:17Z |
| format | Article |
| id | mit-1721.1/124664 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T08:16:17Z |
| publishDate | 2020 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/1246642022-09-30T08:44:03Z Observed changes in Brewer–Dobson circulation for 1980–2018 Solomon, Susan Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Previous work has examined the Brewer–Dobson circulation (BDC) changes for 1980–2009 based on satellite Microwave Sounding Unit (MSU/AMSU) lower-stratospheric temperature (T LS ) observations and ERA-Interim reanalysis data. Here we examine the BDC changes for the longer period now available (1980–2018), which also allows analysis of both the ozone depletion (1980–1999) and ozone healing (2000–2018) periods. We provide observational evidence that the annual mean BDC accelerated for 1980–1999 but decelerated for 2000–2018, with the changes largely driven by the Southern Hemisphere (SH), which might be partly contributed by the effects of ozone depletion and healing. We also show that the annual mean BDC has accelerated in the last 40 years (at the 90% confidence level) with a relative strengthening of ~1.7% per decade. This overall acceleration was driven by both Northern Hemisphere (40%) and SH (60%) cells. Significant SH radiative warming is also identified in September for 2000–2018 after excluding the year 2002 when a very rare SH stratospheric sudden warming occurred, supporting the view that healing of the Antarctic ozone layer has now begun to occur during the month of September. ©2019 NASA (grant: 80NSSC18K1031) NSF (grant: AGS-1821437) NSF (grant: AGS1848863) NOAA (grant: NA18OAR431042) 2020-04-15T17:20:07Z 2020-04-15T17:20:07Z 2019-11 2019-07 2020-04-07T14:56:27Z Article http://purl.org/eprint/type/JournalArticle 1748-9326 https://hdl.handle.net/1721.1/124664 Fu, Qiang, Susan Solomon, Hamid A. Pahlavan, and Pu Lin, "Observed changes in Brewer-Dobson circulation for 1980-2018." Environmental research letters 14, 11 (November 2019): no. 114026 doi 10.1088/1748-9326/AB4DE7 ©2019 Author(s) en 10.1088/1748-9326/AB4DE7 Environmental research letters Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ application/pdf IOP Publishing IOP Publishing |
| spellingShingle | Solomon, Susan Observed changes in Brewer–Dobson circulation for 1980–2018 |
| title | Observed changes in Brewer–Dobson circulation for 1980–2018 |
| title_full | Observed changes in Brewer–Dobson circulation for 1980–2018 |
| title_fullStr | Observed changes in Brewer–Dobson circulation for 1980–2018 |
| title_full_unstemmed | Observed changes in Brewer–Dobson circulation for 1980–2018 |
| title_short | Observed changes in Brewer–Dobson circulation for 1980–2018 |
| title_sort | observed changes in brewer dobson circulation for 1980 2018 |
| url | https://hdl.handle.net/1721.1/124664 |
| work_keys_str_mv | AT solomonsusan observedchangesinbrewerdobsoncirculationfor19802018 |