EGU22-10935, updated on 28 Mar 2022
EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Super recovery of the Hadley Cell edge to the CO2 removal

Yeong-Ju Choi1, Seo-Yeon Kim1, Seok-Woo Son1, Soon-il An2, Sang-Wook Yeh3, Jong-Seong Kug4, Seung-Ki Min4, and Jongsoo Shin2
Yeong-Ju Choi et al.
  • 1Seoul National University, Seoul, South Korea
  • 2Yonsei University, Seoul, South Korea
  • 3Hanyang University, Ansan, South Korea
  • 4Pohang University of Science and Technology (POSTECH), Pohang, South Korea

The poleward shift of the Hadley cell (HC) edge by global warming is widely documented. However, its reversibility to CO2 removal remains unknown. By conducting a climate model experiment where CO2 concentration is systematically increased and then decreased in time, this study shows that a poleward-shifted HC edge in warm climate returns equatorward as CO2 concentration decreases. It is also shown that the rate significantly differs between the two hemispheres. While the southern HC edge monotonically changes with CO2 concentration, the northern HC edge exhibits a super recovery, locating on the equatorward side of the present-climate HC edge when CO2 concentration returns to the present level. Such a super recovery is associated with the hysteresis of the North Atlantic sea surface temperature. Our findings suggest that the HC edge change may result in the super recovery of subtropical dryness in the northern hemisphere except California.

How to cite: Choi, Y.-J., Kim, S.-Y., Son, S.-W., An, S., Yeh, S.-W., Kug, J.-S., Min, S.-K., and Shin, J.: Super recovery of the Hadley Cell edge to the CO2 removal, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-10935,, 2022.

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