the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Experiments on sensitivity of meridional circulation and ozone flux to parameterizations of orographic gravity waves and QBO phases in a general circulation model of the middle atmosphere
N. M. Gavrilov
A. I. Pogoreltsev
E. N. Savenkova
Abstract. Many atmospheric global circulation models have large biases in predicting meridional and vertical winds and fluxes of gas species in remote regions such as the middle and upper atmosphere. In this study, we make sensitivity simulations to recognize the role of vital processes associated with dynamical coupling between different atmospheric layers, namely dynamical and thermal impacts of mesoscale orographic gravity waves (OGWs) generated by the Earth's topography and changes from the easterly to westerly QBO phases in the lower equatorial atmosphere. We improved parameterizations of OGW dynamical and thermal effects and QBO flows and implemented them into a general circulation model of the middle and upper atmosphere used in different countries. With this model, we study the sensitivity of meridional circulation and vertical velocity to stationary OGWs and to changes in QBO phases at altitudes up to 100 km in January. We also considered respective changes in vertical ozone fluxes in the atmosphere. Accounting stationary OGW effects gives changes up to 40 % in the meridional velocity and associated ozone fluxes in the stratosphere. Transitions from the easterly to westerly QBO phase in tropics may significantly alter the meridional and vertical circulation of the middle atmosphere at middle and high latitudes: up to 60 % from the peak respective values. The improved parameterizations of OGW and QBO effects have impacts on other features of the general circulation model, improving the simulation of general circulation, planetary and tidal wave coupling in the lower, middle and upper atmosphere.
- Preprint
(2106 KB) - Metadata XML
- BibTeX
- EndNote
A. V. Koval et al.


-
RC C1755: 'review', Anonymous Referee #1, 21 Aug 2015
-
AC C2517: 'Reply to the anonymous revewer #1', Nikolai M. Gavrilov, 16 Oct 2015
-
AC C2517: 'Reply to the anonymous revewer #1', Nikolai M. Gavrilov, 16 Oct 2015
-
RC C1758: 'Review', Anonymous Referee #2, 21 Aug 2015
-
AC C2518: 'Reply to the anonymous reviewer #2', Nikolai M. Gavrilov, 16 Oct 2015
-
AC C2518: 'Reply to the anonymous reviewer #2', Nikolai M. Gavrilov, 16 Oct 2015
-
RC C2094: 'Review', Anonymous Referee #3, 18 Sep 2015
-
AC C2519: 'Reply to the Anonymous Reviewer #3', Nikolai M. Gavrilov, 16 Oct 2015
-
AC C2519: 'Reply to the Anonymous Reviewer #3', Nikolai M. Gavrilov, 16 Oct 2015


-
RC C1755: 'review', Anonymous Referee #1, 21 Aug 2015
-
AC C2517: 'Reply to the anonymous revewer #1', Nikolai M. Gavrilov, 16 Oct 2015
-
AC C2517: 'Reply to the anonymous revewer #1', Nikolai M. Gavrilov, 16 Oct 2015
-
RC C1758: 'Review', Anonymous Referee #2, 21 Aug 2015
-
AC C2518: 'Reply to the anonymous reviewer #2', Nikolai M. Gavrilov, 16 Oct 2015
-
AC C2518: 'Reply to the anonymous reviewer #2', Nikolai M. Gavrilov, 16 Oct 2015
-
RC C2094: 'Review', Anonymous Referee #3, 18 Sep 2015
-
AC C2519: 'Reply to the Anonymous Reviewer #3', Nikolai M. Gavrilov, 16 Oct 2015
-
AC C2519: 'Reply to the Anonymous Reviewer #3', Nikolai M. Gavrilov, 16 Oct 2015
A. V. Koval et al.
A. V. Koval et al.
Viewed
HTML | XML | Total | BibTeX | EndNote | |
---|---|---|---|---|---|
947 | 260 | 67 | 1,274 | 55 | 63 |
- HTML: 947
- PDF: 260
- XML: 67
- Total: 1,274
- BibTeX: 55
- EndNote: 63
Cited
3 citations as recorded by crossref.
- Propagation of stationary planetary waves to the thermosphere at different levels of solar activity A. Koval et al. 10.1016/j.jastp.2018.03.012
- Propagation of Stationary Planetary Waves in the Upper Atmosphere under Different Solar Activity A. Koval et al. 10.1134/S001679321802010X
- Comparisons of planetary wave propagation to the upper atmosphere during stratospheric warming events at different QBO phases A. Koval et al. 10.1016/j.jastp.2017.04.013