Sangam: A Confluence of Knowledge Streams

Observed changes in Brewer–Dobson circulation for 1980–2018

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dc.contributor Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
dc.creator Solomon, Susan
dc.date 2020-04-15T17:20:07Z
dc.date 2020-04-15T17:20:07Z
dc.date 2019-11
dc.date 2019-07
dc.date 2020-04-07T14:56:27Z
dc.date.accessioned 2023-03-01T18:09:45Z
dc.date.available 2023-03-01T18:09:45Z
dc.identifier 1748-9326
dc.identifier https://hdl.handle.net/1721.1/124664
dc.identifier 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)
dc.identifier.uri http://localhost:8080/xmlui/handle/CUHPOERS/278985
dc.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
dc.description NASA (grant: 80NSSC18K1031)
dc.description NSF (grant: AGS-1821437)
dc.description NSF (grant: AGS1848863)
dc.description NOAA (grant: NA18OAR431042)
dc.format application/pdf
dc.language en
dc.publisher IOP Publishing
dc.relation 10.1088/1748-9326/AB4DE7
dc.relation Environmental research letters
dc.rights Creative Commons Attribution 4.0 International license
dc.rights https://creativecommons.org/licenses/by/4.0/
dc.source IOP Publishing
dc.title Observed changes in Brewer–Dobson circulation for 1980–2018
dc.type Article
dc.type http://purl.org/eprint/type/JournalArticle


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