Explosive increase in convective Extreme El Niño events in the CO2 removal scenario
- 1Pohang University of Science and Technology, Environmental Science and Engineering, Pohang, Korea, Republic of.
- 2Department of Oceanography and Marine Geology, FMST, University of Ruhuna, Matara, Sri Lanka.
- 3Centre for Southern Hemisphere Oceans Research (CSHOR), CSIRO Oceans and Atmosphere, Hobart, Australia.
- 4Department of Atmospheric Sciences, Yonsei University, Seoul, South Korea.
- 5Institute for Convergence Research and Education in Advanced Technology, Yonsei University, Seoul, South Korea.
Convective extreme El Niño (CEE) events, characterized by strong convective events in the eastern Pacific, are known to have a direct link to anomalous climate conditions worldwide, and it has been reported that CEE will occur more frequently under greenhouse warming. Here, using a set of CO2 ramp-up and –down ensemble experiments, we show that frequency and maximum intensity of CEE events increase further in the ramp-down period from the ramp-up period. Such changes in CEE are associated with the southward shift of the Intertropical Convergence Zone and intensified nonlinear rainfall response to SST change in the ramp-down period. The increasing frequency of CEE has substantial impacts on regional abnormal events and contributed considerably to regional mean climate changes to the CO2 forcings.
How to cite: Pathirana, G., Oh, J.-H., Cai, W., An, S.-I., Min, S.-K., Jo, S.-Y., Shin, J., and Kug, J.-S.: Explosive increase in convective Extreme El Niño events in the CO2 removal scenario, EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-1945, https://doi.org/10.5194/egusphere-egu23-1945, 2023.
