Articles | Volume 18, issue 10
https://doi.org/10.5194/acp-18-7169-2018
https://doi.org/10.5194/acp-18-7169-2018
Research article
 | 
24 May 2018
Research article |  | 24 May 2018

A comparison of the momentum budget in reanalysis datasets during sudden stratospheric warming events

Patrick Martineau, Seok-Woo Son, Masakazu Taguchi, and Amy H. Butler

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Cited articles

Abalos, M., Legras, B., Ploeger, F., and Randel, W. J.: Evaluating the advective Brewer-Dobson circulation in three reanalyses for the period 1979–2012, J. Geophys. Res.-Atmos., 120, 7534–7554, https://doi.org/10.1002/2015JD023182, 2015. 
Ayarzaguena, B., Langematz, U., and Serrano, E.: Tropospheric forcing of the stratosphere: A comparative study of the two different major stratospheric warmings in 2009 and 2010, J. Geophys. Res.-Atmos., 116, 1–15, https://doi.org/10.1029/2010JD015023, 2011. 
Baldwin, M. P.: Stratospheric Harbingers of Anomalous Weather Regimes, Science, 294, 581–584, https://doi.org/10.1126/science.1063315, 2001. 
Bancalá, S., Krüger, K., and Giorgetta, M.: The preconditioning of major sudden stratospheric warmings, J. Geophys. Res.-Atmos., 117, 1–12, https://doi.org/10.1029/2011JD016769, 2012. 
Butler, A. H., Seidel, D. J., Hardiman, S. C., Butchart, N., Birner, T., and Match, A.: Defining Sudden Stratospheric Warmings, B. Am. Meteorol. Soc., 96, 1913–1928, https://doi.org/10.1175/BAMS-D-13-00173.1, 2015. 
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Short summary
This study evaluates the agreement between eight reanalysis datasets by comparing zonal-mean zonal winds and the forcing terms of the zonal-mean momentum equation during sudden stratospheric warming events. Results show that the spread between datasets increases exponentially with height and is largest during the most intense sudden stratospheric warming events. The largest uncertainties arise from differences in the mean meridional circulation and horizontal fluxes of momentum by eddies.
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