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ACP | Articles | Volume 20, issue 9
Atmos. Chem. Phys., 20, 5249–5268, 2020
https://doi.org/10.5194/acp-20-5249-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Atmos. Chem. Phys., 20, 5249–5268, 2020
https://doi.org/10.5194/acp-20-5249-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 06 May 2020

Research article | 06 May 2020

Hadley cell expansion in CMIP6 models

Kevin M. Grise and Sean M. Davis

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Cited articles

Adam, O., Grise, K. M., Staten, P., Simpson, I. R., Davis, S. M., Davis, N. A., Waugh, D. W., Birner, T., and Ming, A.: The TropD software package (v1): standardized methods for calculating tropical-width diagnostics, Geosci. Model Dev., 11, 4339–4357, https://doi.org/10.5194/gmd-11-4339-2018, 2018a. 
Adam, O., Grise, K. M., Staten, P., Simpson, I., Davis, S. M., Davis, N. A., Waugh, D. W., and Birner, T.: TropD: Tropical width diagnostics software package (Version 1.0), Zenodo, https://doi.org/10.5281/zenodo.1157043, 2018b. 
Allen, R. J. and Ajoku, O.: Future aerosol reductions and widening of the northern tropical belt, J. Geophys. Res.-Atmos., 121, 6765–6786, https://doi.org/10.1002/2016JD024803, 2016. 
Allen, R. J. and Kovilakam, M.: The role of natural climate variability in recent tropical expansion, J. Climate, 30, 6329–6350, https://doi.org/10.1175/JCLI-D-16-0735.1, 2017. 
Allen, R. J., Sherwood, S. C., Norris, J. R., and Zender, C. S.: Recent Northern Hemisphere tropical expansion primarily driven by black carbon and tropospheric ozone, Nature, 485, 350–354, https://doi.org/10.1038/nature11097, 2012. 
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As Earth's climate warms, the tropical overturning circulation (Hadley circulation) is projected to expand, potentially pushing subtropical dry zones further poleward. This study examines projections of the Hadley circulation from the latest generation of computer models and finds several notable differences from older models. For example, the Northern Hemisphere circulation has expanded northward at a greater rate in recent decades than would be expected from increasing greenhouse gases alone.
As Earth's climate warms, the tropical overturning circulation (Hadley circulation) is projected...
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