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...
Published in: | Environmental Research Letters |
---|---|
Main Author: | |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
IOP Publishing
2020
|
Subjects: | |
Online Access: | https://hdl.handle.net/1721.1/124664 |
id |
ftmit:oai:dspace.mit.edu:1721.1/124664 |
---|---|
record_format |
openpolar |
spelling |
ftmit:oai:dspace.mit.edu:1721.1/124664 2023-06-11T04:06:05+02:00 Observed changes in Brewer–Dobson circulation for 1980–2018 Solomon, Susan Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences 2020-04-07T14:56:27Z application/pdf https://hdl.handle.net/1721.1/124664 en eng IOP Publishing 10.1088/1748-9326/AB4DE7 Environmental research letters 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) Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ IOP Publishing Article http://purl.org/eprint/type/JournalArticle 2020 ftmit https://doi.org/10.1088/1748-9326/AB4DE7 2023-05-29T07:27:06Z 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) Article in Journal/Newspaper Antarc* Antarctic DSpace@MIT (Massachusetts Institute of Technology) Antarctic The Antarctic Environmental Research Letters 14 11 114026 |
institution |
Open Polar |
collection |
DSpace@MIT (Massachusetts Institute of Technology) |
op_collection_id |
ftmit |
language |
English |
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 NASA (grant: 80NSSC18K1031) NSF (grant: AGS-1821437) NSF (grant: AGS1848863) NOAA (grant: NA18OAR431042) |
author2 |
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences |
format |
Article in Journal/Newspaper |
author |
Solomon, Susan |
spellingShingle |
Solomon, Susan Observed changes in Brewer–Dobson circulation for 1980–2018 |
author_facet |
Solomon, Susan |
author_sort |
Solomon, Susan |
title |
Observed changes in Brewer–Dobson circulation for 1980–2018 |
title_short |
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_sort |
observed changes in brewer–dobson circulation for 1980–2018 |
publisher |
IOP Publishing |
publishDate |
2020 |
url |
https://hdl.handle.net/1721.1/124664 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
IOP Publishing |
op_relation |
10.1088/1748-9326/AB4DE7 Environmental research letters 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) |
op_rights |
Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1088/1748-9326/AB4DE7 |
container_title |
Environmental Research Letters |
container_volume |
14 |
container_issue |
11 |
container_start_page |
114026 |
_version_ |
1768377829090656256 |