Description:

Two-way coupling between the stratosphere and troposphere modifies the tropospheric circulation over a wide range of timescales, ranging from days to multi-year periods. We welcome modeling, observational, and diagnostic studies concerned with the interactions between the two layers over a broad range of timescales and a broad range of regions. This includes studies analyzing what role the stratosphere plays in subseasonal to seasonal prediction of tropospheric variability and studies using novel atmospheric observations to better constrain and represent physical processes or, when needed, better parametrize such processes in models (e.g., gravity wave breaking). Studies concerned with the large-scale atmospheric response to both internal climate variability (e.g., the Quasi-Biennial Oscillation, fluctuations in sea surface temperature, solar cycle, volcanic aerosol injections) and external climate variability (e.g., post-Montreal Protocol stratospheric recovery, future stratospheric changes) are also welcome.