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Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
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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

Data sets

MERRA-2 tavgM_2d_slv_Nx: 2d,Monthly mean, Time-Averaged, Single-Level, Assimilation, Single-Level Diagnostics V5.12.4 Global Modeling and Assimilation Office (GMAO) https://doi.org/10.5067/AP1B0BA5PD2K

MERRA-2 instM_3d_asm_Np: 3d,Monthly mean, nstantaneous, Pressure-Level, Assimilation, Assimilated Meteorological Fields V5.12.4 Global Modeling and Assimilation Office (GMAO) https://doi.org/10.5067/2E096JV59PK7

RA-55: Japanese 55-year Reanalysis, Monthly Means and Variances Japan Meteorological Agency https://doi.org/10.5065/D60G3H5B

CEP Climate Forecast System Reanalysis (CFSR) Monthly Products, January 1979 to December 2010 S. Saha, S. Moorthi, H. Pan, X. Wu, J. Wang, S. Nadiga, P. Tripp, R. Kistler, J. Woollen, D. Behringer, H. Liu, D. Stokes, R. Grumbine, G. Gayno, J. Wang, Y. Hou, H. Chuang, H. H. Juang, J. Sela, M. Iredell, R. Treadon, D. Kleist, P. V. Delst, D. Keyser, J. Derber, M. Ek, J. Meng, H. Wei, R. Yang, S. Lord, H. van den Dool, A. Kumar, W. Wang, C. Long, M. Chelliah, Y. Xue, B. Huang, J. Schemm, W. Ebisuzaki, R. Lin, P. Xie, M. Chen,S. Zhou, W. Higgins, C. Zou, Q. Liu, Y. Chen, Y. Han, L. Cucurull, R. W. Reynolds, G. Rutledge, and M. Goldberg, https://doi.org/10.5065/D6DN438J

NCEP Climate Forecast System Version 2 (CFSv2) Monthly Products S. Saha, S. Moorthi, X. Wu, J. Wang, S. Nadiga, P. Tripp, D. Behringer, Y. Hou, H. Chuang, M. Iredell, M. Ek, J. Meng, R. Yang, M. P. Mendez, van H. den Dool, Q. Zhang, W. Wang, M. Chen, and E. Becker https://doi.org/10.5065/D69021ZF

Model code and software

TropD: Tropical width diagnostics software package (Version 1.0) O. Adam, K. M. Grise, P. Staten, I. Simpson, S. M. Davis, N. A. Davis, D. W. Waugh, and T. Birner, https://doi.org/10.5281/zenodo.1157043

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Short summary
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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