the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Stratospheric Variability at a glance – Analysis of the intra decadal timescale and the QBO
Abstract. In this study the stratospheric variability is analysed from decadal to seasonal timescales. Relevant processes for the decadal timescale are identified by means of power spectral analysis. The inspection of the ERA-Interim reanalysis data set shows considerably high variability at the 12 and 6 months period. But also in the extra tropical region at intra-annual to seasonal timescales clear peaks in the power spectrum arise. In addition to that, the quasi-biennial oscillation (QBO) obviously contributes to the stratospheric variability at decadal timescales. Regarding the power spectrum of EMAC 2.52 model simulations, only a model configuration with a vertical resolution smaller than 1 km in the stratosphere is capable to capture the relevant features of the spectrum. In particular, the model with a coarser distribution of vertical levels cannot reproduce the QBO signal. The analysis of the corresponding wave spectra reveals that, if the vertical resolution is insufficient, primarily the Mixed-Rossby-Gravity waves cannot be adequately reproduced. Estimates made by linear wave theory show that for reanalysis data the Mixed-Rossby-Gravity waves with equivalent depths between 50 m to 250 m are relevant for the QBO. In order to resolve these relevant waves, model simulations need to consider a vertical resolution of at least 1 km.
- Preprint
(1651 KB) - Metadata XML
- BibTeX
- EndNote
-
RC1: 'Referee comment on "Stratospheric variability at a glance - Analysis of the intra decadal timescale and the QBO"', Anonymous Referee #1, 23 Nov 2016
- AC1: 'Reply to Anonymous Referee #1', Duy Sinh Cai, 09 Dec 2016
-
RC2: 'Stratospheric variability at a glance - analysis of the intra decadal timescale and the QBO', Anonymous Referee #2, 17 Dec 2016
- AC2: 'Reply to Anonymous Referee #2', Duy Sinh Cai, 22 Dec 2016
-
RC3: 'Review comments on "Stratospheric Variability at a glance - Analysis of the intra decadal timescale and the QBO" by Cai et al.', Anonymous Referee #3, 22 Dec 2016
-
AC3: 'Reply to referee #3', Duy Sinh Cai, 23 Dec 2016
- RC4: 'Reply to Author response to Reviewer #3 for "Stratospheric Variability at a glance - Analysis of the intra decadal timescale and the QBO" by Cai et al.', Anonymous Referee #3, 03 Jan 2017
-
AC3: 'Reply to referee #3', Duy Sinh Cai, 23 Dec 2016
- AC4: 'General comment to all reviewers', Duy Sinh Cai, 23 Dec 2016
-
RC1: 'Referee comment on "Stratospheric variability at a glance - Analysis of the intra decadal timescale and the QBO"', Anonymous Referee #1, 23 Nov 2016
- AC1: 'Reply to Anonymous Referee #1', Duy Sinh Cai, 09 Dec 2016
-
RC2: 'Stratospheric variability at a glance - analysis of the intra decadal timescale and the QBO', Anonymous Referee #2, 17 Dec 2016
- AC2: 'Reply to Anonymous Referee #2', Duy Sinh Cai, 22 Dec 2016
-
RC3: 'Review comments on "Stratospheric Variability at a glance - Analysis of the intra decadal timescale and the QBO" by Cai et al.', Anonymous Referee #3, 22 Dec 2016
-
AC3: 'Reply to referee #3', Duy Sinh Cai, 23 Dec 2016
- RC4: 'Reply to Author response to Reviewer #3 for "Stratospheric Variability at a glance - Analysis of the intra decadal timescale and the QBO" by Cai et al.', Anonymous Referee #3, 03 Jan 2017
-
AC3: 'Reply to referee #3', Duy Sinh Cai, 23 Dec 2016
- AC4: 'General comment to all reviewers', Duy Sinh Cai, 23 Dec 2016
Viewed
HTML | XML | Total | BibTeX | EndNote | |
---|---|---|---|---|---|
1,440 | 302 | 117 | 1,859 | 90 | 107 |
- HTML: 1,440
- PDF: 302
- XML: 117
- Total: 1,859
- BibTeX: 90
- EndNote: 107
Viewed (geographical distribution)
Country | # | Views | % |
---|
Total: | 0 |
HTML: | 0 |
PDF: | 0 |
XML: | 0 |
- 1