Articles | Volume 37, issue 4
https://doi.org/10.5194/angeo-37-525-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-37-525-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Regular paper
| 
04 Jul 2019
Regular paper |
| 04 Jul 2019
| 04 Jul 2019
Assessing the role of planetary and gravity waves in the vertical structure of ozone over midlatitudinal Europe
Peter Križan
CORRESPONDING AUTHOR
Institute of Atmospheric Physics, Czech Academy of Sciences, Prague, Czech Republic
Related authors
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This paper is devoted to the occurrence of discontinuities in the ozone concentration data from the selected reanalyses, because they have large impact to the results of trend studies. The discontinuity occurrence is reanalyse dependant. The discontinuities frequently occur at the middle stratosphere and in the troposphere for a certain reanalyses. According our opinion, the reanalyses data can be used in trend studies especially in the lower stratosphere.
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The main goal of this paper is to show the geographical distribution of meridional wind for several reanalyses and to analyse the wind trends in different areas. We show two areas (100°E-160°E and 140°W-80°W) where the meridional wind is as strong as zonal wind (which is normally dominant in the stratosphere). The trends of meridional wind are significant mostly at 99% level in these areas and insignificant outside. The problem with zonal averages could affect the results.
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Publication in ACP not foreseen
Short summary
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This paper is devoted to the occurrence of discontinuities in the ozone concentration data from the selected reanalyses, because they have large impact to the results of trend studies. The discontinuity occurrence is reanalyse dependant. The discontinuities frequently occur at the middle stratosphere and in the troposphere for a certain reanalyses. According our opinion, the reanalyses data can be used in trend studies especially in the lower stratosphere.
Jan Lastovicka, Peter Krizan, and Michal Kozubek
Ann. Geophys., 36, 181–192, https://doi.org/10.5194/angeo-36-181-2018, https://doi.org/10.5194/angeo-36-181-2018, 2018
Short summary
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The longitudinal structure in geopotential heights and meridional wind is analysed for 1979–2013 in order to find its persistence and altitudinal dependence with focus on anomalous years. Substantial deviations from the average pattern are studied for Januaries – typically the second (Euro-Atlantic) peak extends to much higher altitudes than usual. The decisive role in the existence of anomalous years appears to be played by the stationary planetary wave filtering by the zonal wind pattern.
Michal Kozubek, Peter Krizan, and Jan Lastovicka
Ann. Geophys., 35, 279–294, https://doi.org/10.5194/angeo-35-279-2017, https://doi.org/10.5194/angeo-35-279-2017, 2017
Short summary
Short summary
A study of trends in the middle stratosphere using comparisons of four main reanalyses (ERA-Interim, JRA-55, MERRA and NCEP/NCAR). We identified that all four reanalyses show very similar trends on a season or monthly basis. We also compute trends for each grid point not as a zonal mean. This approach shows detailed features in the trend studies in both hemispheres.
Jan Laštovička, Dalia Burešová, Daniel Kouba, and Peter Križan
Ann. Geophys., 34, 1191–1196, https://doi.org/10.5194/angeo-34-1191-2016, https://doi.org/10.5194/angeo-34-1191-2016, 2016
Short summary
Short summary
Global climate change affects the whole atmosphere, including the thermosphere and ionosphere. Calculations of long-term trends in the ionosphere are critically dependent on solar activity correction of ionospheric input data. The main result of this study is the finding that the solar activity correction used in calculating ionospheric long-term trends is not stable, as was assumed in all previous investigations of ionospheric trends.
M. Kozubek, P. Krizan, and J. Lastovicka
Atmos. Chem. Phys., 15, 2203–2213, https://doi.org/10.5194/acp-15-2203-2015, https://doi.org/10.5194/acp-15-2203-2015, 2015
Short summary
Short summary
The main goal of this paper is to show the geographical distribution of meridional wind for several reanalyses and to analyse the wind trends in different areas. We show two areas (100°E-160°E and 140°W-80°W) where the meridional wind is as strong as zonal wind (which is normally dominant in the stratosphere). The trends of meridional wind are significant mostly at 99% level in these areas and insignificant outside. The problem with zonal averages could affect the results.
M. Kozubek, E. Rozanov, and P. Krizan
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acpd-14-23891-2014, https://doi.org/10.5194/acpd-14-23891-2014, 2014
Revised manuscript not accepted
M. Kozubek, J. Laštovička, and P. Križan
Ann. Geophys., 32, 353–366, https://doi.org/10.5194/angeo-32-353-2014, https://doi.org/10.5194/angeo-32-353-2014, 2014
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Short summary
We observe the planetary and gravity wave activity in the vertical profile of ozone at the mid-European ozonosonde stations The performance of the used detection method is satisfactory. There are differences in the following characteristics of the structure caused by the planetary and gravity wave: the annual variation, the size, and the vertical distribution. The results are influenced by the ozonosonde vertical resolution only for small and medium structures.
We observe the planetary and gravity wave activity in the vertical profile of ozone at the...
