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Asymmetric ENSO teleconnections in a symmetric CO2 concentration pathway
| Year of publication | 2024 | |||||
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| Title of paper | Asymmetric ENSO teleconnections in a symmetric CO2 concentration pathway | |||||
| Author | Soon-Il An, Su-Hyeon Shin, Chao Liu, Sang-Wook Yeh, Seung-Ki Min, Seok-Woo Son, Jong-Seong Kug, Jae-Heung Park | |||||
| Publication in journal | Environmental Research Letters | |||||
| Status of publication | published | |||||
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El Niño-Southern Oscillation (ENSO) is the strongest interannual phenomenon occurring in the tropical Pacific, significantly affecting the entire world. The ENSO response to increasing CO 2 concentrations have been extensively studied, but the reverse scenario is still not well understood. Here, we investigate the hysteresis of ENSO teleconnections in a CO 2 removal simulation of an earth system model. During the ramp-up period of CO 2 concentrations, Pacific-North American and Pacific-South American patterns are intensified, with the eastward shift of their poles, which are even further intensified during the ramp-down period. This ENSO teleconnection hysteresis is closely linked to the tropical-origin hysteresis, in which, during the ramp-down periods, the prevalence of the eastern-Pacific type El Niño leads to the hysteresis in the eastern Hemispheric ENSO teleconnections and the enhanced ENSO skewness …