General circulation and global heat transport in a quadrupling CO2 pulse experiment

Soon Il An, So Eun Park, Jongsoo Shin, Young Min Yang, Sang Wook Yeh, Seok Woo Son, Jong Seong Kug

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To investigate the response of the general circulation and global transport of heat through both atmosphere and ocean to two-types of carbon dioxide removal scenario, we performed an earth system model experiment in which we imposed a pulse-type quadrupling of CO2 forcing for 50 years and a gradual peak-and-decline of four-time CO2 forcing. We found that the results from two experiments are qualitatively similar to each other. During the forcing-on period, a dominant warming in the upper troposphere over the tropics and on the surface at high latitudes led to a slowdown in the Hadley circulation, but the poleward atmospheric energy transport was enhanced due to an increase in specific humidity. This counteracted the reduction in poleward oceanic energy transport owing to the suppression of the meridional overturning circulation in both Hemispheres. After returning the original CO2 level, the hemispheric thermal contrast was reversed, causing a southward shift of the intertropical convergence zone. To reduce the hemispheric thermal contrast, the northward energy transports in the atmosphere and ocean surface were enhanced while further weakening of the global-scale Atlantic meridional overturning circulation led to southward energy transport in the deep ocean.

Original languageEnglish
Article number11569
JournalScientific reports
Issue number1
Publication statusPublished - 2022 Dec

Bibliographical note

Funding Information:
This work was supported by a National Research Foundation of Korea Grant funded by the Korea government (NRF-2018R1A5A1024958). Model simulation and data transfer were supported by the National Supercomputing Center with supercomputing resources including technical support (KSC-2019-CHA-0005), the National Center for Meteorological Supercomputer of the Korea Meteorological Administration, and by the Korea Research Environment Open NETwork (KREONET), respectively.

Publisher Copyright:
© 2022, The Author(s).

All Science Journal Classification (ASJC) codes

  • General


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