Publication Abstracts

Menzel et al. 2023

Menzel, M., D. Waugh, and C. Orbe, 2023: Connections between upper tropospheric and lower stratospheric circulation responses to increased CO2. J. Climate, 36, no. 12, 4101-2112, doi:10.1175/JCLI-D-22-0851.1.

There are a myriad of ways atmospheric circulation responds to increased CO2. In the troposphere, the region of the tropical upwelling narrows, the Hadley Cells expand, and the upper level subtropical zonal winds that comprise the subtropical jet strengthen. In the stratosphere, the tropical upwelling narrows and strengthens, enhancing the Brewer-Dobson Circulation. Despite the robustness of these projections, dynamical coupling between the features remains unclear. In this study, we analyze output from the NASA Goddard Institute for Space Studies (GISS) ModelE coupled climate model to examine any connection between the upper tropospheric and lower stratospheric circulation by considering the features' seasonality, hemispheric asymmetry, scaling, and transient response to a broad range of CO2 forcings. We find that a narrowing and strengthening of upper tropospheric upwelling occurs with a strengthening of the subtropical jet. There is also a narrowing and strengthening of lower stratospheric upwelling that is related to an equatorward shift in critical latitude for wave breaking and the associated strengthening of the subtropical lower stratosphere zonal winds. However, the stratospheric responses display different seasonal, hemispheric, and transient patterns than those in the troposphere, indicating independent circulation changes between the two domains.

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BibTeX Citation

@article{me03300h,
  author={Menzel, M. and Waugh, D. and Orbe, C.},
  title={Connections between upper tropospheric and lower stratospheric circulation responses to increased CO2},
  year={2023},
  journal={J. Climate},
  volume={36},
  number={12},
  pages={4101--2112},
  doi={10.1175/JCLI-D-22-0851.1},
}

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RIS Citation

TY  - JOUR
ID  - me03300h
AU  - Menzel, M.
AU  - Waugh, D.
AU  - Orbe, C.
PY  - 2023
TI  - Connections between upper tropospheric and lower stratospheric circulation responses to increased CO2
JA  - J. Climate
VL  - 36
IS  - 12
SP  - 4101
EP  - 2112
DO  - 10.1175/JCLI-D-22-0851.1
ER  -

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