EGU2020-13468
https://doi.org/10.5194/egusphere-egu2020-13468
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Influence of the stratospheric shrinkage on the detected CCMI simulation trends

Petr Pisoft and Petr Šácha
Petr Pisoft and Petr Šácha
  • Charles University, Faculty of Mathematics and Physics, Department of Atmospheric Physics, Prague, Czechia (petr.pisoft@mff.cuni.cz)

There is a well-established observational evidence that the tropopause is shifting upward. More generally, warming of the troposphere is directly connected with a positive trend of geopotential of pressure levels in the troposphere, which reaches its maximum around the tropopause. In the stratosphere, the geopotential height trends are affected by the stratospheric cooling resulting in a gradual reduction of the upward shift and even its reversal in the upper stratosphere. That leads to a decreasing trend of the stratospheric thickness - a so-called stratospheric shrinkage. In GCMs, shrinkage is one of the strongest and most robust fingerprints of the changing climate. In this study, we investigate the question whether the shrinkage presents additional dynamical feedback influencing other detected trends in the middle atmosphere (besides the influence of vertical shift). Analyzing set of CCMI models, we compute inter-model correlations of shrinkage with trends of various variables to separate the possible shrinkage effect, which is otherwise a non-local function of the temperature.

How to cite: Pisoft, P. and Šácha, P.: Influence of the stratospheric shrinkage on the detected CCMI simulation trends , EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-13468, https://doi.org/10.5194/egusphere-egu2020-13468, 2020

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Presentation version 2 – uploaded on 06 May 2020
Several typos corrected
  • AC1: Zoom link during the chat, Petr Pisoft, 06 May 2020

    You may also discuss the study with me using Zoom.

    Topic: EGU chat EGU2020-13468, AS3.3/CL3.17
    Time: May 7, 2020 02:00-04:00 PM Vienna

    Join Zoom Meeting
    https://lfp-cuni.zoom.us/j/92495424799

    Meeting ID: 924 9542 4799

Presentation version 1 – uploaded on 06 May 2020
  • AC1: Zoom link during the chat, Petr Pisoft, 06 May 2020

    You may also discuss the study with me using Zoom.

    Topic: EGU chat EGU2020-13468, AS3.3/CL3.17
    Time: May 7, 2020 02:00-04:00 PM Vienna

    Join Zoom Meeting
    https://lfp-cuni.zoom.us/j/92495424799

    Meeting ID: 924 9542 4799