Representation of the equatorial stratopause semiannual oscillation in global atmospheric reanalyses

Kawatani, Yoshio; Hirooka, Toshihiko; Hamilton, Kevin; Smith, Anne K.; Fujiwara, Masatomo

doi:https://doi.org/10.5194/acp-20-9115-2020

Articles | Volume 20, issue 14

https://doi.org/10.5194/acp-20-9115-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

The SPARC Reanalysis Intercomparison Project (S-RIP) (ACP/ESSD...

https://doi.org/10.5194/acp-20-9115-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 20, issue 14

Research article

|

31 Jul 2020

Research article |

| 31 Jul 2020

Representation of the equatorial stratopause semiannual oscillation in global atmospheric reanalyses

Yoshio Kawatani, Toshihiko Hirooka, Kevin Hamilton, Anne K. Smith, and Masatomo Fujiwara

Data sets

Links to Global Atmospheric Reanalysis Datasets SPARC https://s-rip.ees.hokudai.ac.jp/resources/links.html

Short summary

This paper reports on a project to compare the representation of the semiannual oscillation (SAO) among six major global atmospheric reanalyses and with recent satellite observations. The differences among the zonal mean zonal wind as represented by the various reanalyses display a prominent equatorial maximum that increases with height. It is shown that assimilation of satellite temperature measurements is crucial for the realistic representation of the tropical upper stratospheric circulation.