The strength of the meridional overturning circulation of the stratosphere

Marianna Linz, R. Alan Plumb, Edwin Gerber, Florian J. Haenel, Gabriele Stiller, Douglas E. Kinnison, Alison Ming, Jessica L. Neu

Research output: Contribution to journalArticle

Abstract

The distribution of gases such as ozone and water vapour in the stratosphere-which affect surface climate-is influenced by the meridional overturning of mass in the stratosphere, the Brewer-Dobson circulation. However, observation-based estimates of the global strength of this circulation are difficult to obtain. Here we present two calculations of the mean strength of the meridional overturning of the stratosphere. We analyse satellite data that document the global diabatic circulation between 2007-2011, and compare these to three reanalysis data sets and to simulations with a state-of-the-art chemistry-climate model. Using measurements of sulfur hexafluoride (SF6) and nitrous oxide, we calculate the global mean diabatic overturning mass flux throughout the stratosphere. In the lower stratosphere, these two estimates agree, and at a potential temperature level of 460 K (about 20 km or 60hPa in tropics) the global circulation strength is 6.3-7.6 × 109kgs-1. Higher in the atmosphere, only the SF6-based estimate is available, and it diverges from the reanalysis data and simulations. Interpretation of the SF6-data-based estimate is limited because of a mesospheric sink of SF6; however, the reanalyses also differ substantially from each other. We conclude that the uncertainty in the mean meridional overturning circulation strength at upper levels of the stratosphere amounts to at least 100%.

Original languageEnglish (US)
Pages (from-to)663-667
Number of pages5
JournalNature Geoscience
Volume10
Issue number9
DOIs
StatePublished - Sep 1 2017

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meridional circulation
stratosphere
potential temperature
nitrous oxide
simulation
satellite data
climate modeling
water vapor
ozone
sulfur
atmosphere
climate
gas

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)

Cite this

Linz, M., Plumb, R. A., Gerber, E., Haenel, F. J., Stiller, G., Kinnison, D. E., ... Neu, J. L. (2017). The strength of the meridional overturning circulation of the stratosphere. Nature Geoscience, 10(9), 663-667. https://doi.org/10.1038/ngeo3013

The strength of the meridional overturning circulation of the stratosphere. / Linz, Marianna; Plumb, R. Alan; Gerber, Edwin; Haenel, Florian J.; Stiller, Gabriele; Kinnison, Douglas E.; Ming, Alison; Neu, Jessica L.

In: Nature Geoscience, Vol. 10, No. 9, 01.09.2017, p. 663-667.

Research output: Contribution to journalArticle

Linz, M, Plumb, RA, Gerber, E, Haenel, FJ, Stiller, G, Kinnison, DE, Ming, A & Neu, JL 2017, 'The strength of the meridional overturning circulation of the stratosphere', Nature Geoscience, vol. 10, no. 9, pp. 663-667. https://doi.org/10.1038/ngeo3013
Linz M, Plumb RA, Gerber E, Haenel FJ, Stiller G, Kinnison DE et al. The strength of the meridional overturning circulation of the stratosphere. Nature Geoscience. 2017 Sep 1;10(9):663-667. https://doi.org/10.1038/ngeo3013
Linz, Marianna ; Plumb, R. Alan ; Gerber, Edwin ; Haenel, Florian J. ; Stiller, Gabriele ; Kinnison, Douglas E. ; Ming, Alison ; Neu, Jessica L. / The strength of the meridional overturning circulation of the stratosphere. In: Nature Geoscience. 2017 ; Vol. 10, No. 9. pp. 663-667.
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