Observed changes in Brewer–Dobson circulation for 1980–2018
Abstract 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 availab...
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crioppubl:10.1088/1748-9326/ab4de7 2024-09-15T17:48:46+00:00 Observed changes in Brewer–Dobson circulation for 1980–2018 Fu, Qiang Solomon, Susan Pahlavan, Hamid A Lin, Pu 2019 http://dx.doi.org/10.1088/1748-9326/ab4de7 https://iopscience.iop.org/article/10.1088/1748-9326/ab4de7 https://iopscience.iop.org/article/10.1088/1748-9326/ab4de7/pdf unknown IOP Publishing http://creativecommons.org/licenses/by/3.0/ https://iopscience.iop.org/info/page/text-and-data-mining Environmental Research Letters volume 14, issue 11, page 114026 ISSN 1748-9326 journal-article 2019 crioppubl https://doi.org/10.1088/1748-9326/ab4de7 2024-08-19T04:15:18Z Abstract 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. Article in Journal/Newspaper Antarc* Antarctic IOP Publishing Environmental Research Letters 14 11 114026 |
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Abstract 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. |
format |
Article in Journal/Newspaper |
author |
Fu, Qiang Solomon, Susan Pahlavan, Hamid A Lin, Pu |
spellingShingle |
Fu, Qiang Solomon, Susan Pahlavan, Hamid A Lin, Pu Observed changes in Brewer–Dobson circulation for 1980–2018 |
author_facet |
Fu, Qiang Solomon, Susan Pahlavan, Hamid A Lin, Pu |
author_sort |
Fu, Qiang |
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 |
2019 |
url |
http://dx.doi.org/10.1088/1748-9326/ab4de7 https://iopscience.iop.org/article/10.1088/1748-9326/ab4de7 https://iopscience.iop.org/article/10.1088/1748-9326/ab4de7/pdf |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Environmental Research Letters volume 14, issue 11, page 114026 ISSN 1748-9326 |
op_rights |
http://creativecommons.org/licenses/by/3.0/ https://iopscience.iop.org/info/page/text-and-data-mining |
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 |
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1810290286666973184 |