- Geofysisk institutt, Universitetet i Bergen, Bergen, Norway (ping-gin.chiu@uib.no)
The ENSO event is partially affected by tropical Atlantic El Nino, according to past studies. In this study, pacemaker experiments are conducted with NorESM in four configurations, totaling 20 members, in total during 1980-2020. The results show there is a correlation between tropical JJA ATL3 and the later DJF NINO3.4. This connection is strong before 2000, and disappears afterward. Which is consistant with observation. Zonal wind correlation indicated the path of this connection.
However, it was also found that the SST west of ATL3 has a stronger relationship to NINO3.4 in both periods. This implies that ATL3 is useful for detecting Atlantic ENSO, but the interaction is more robust in the closer region.
How to cite: Chiu, P.-G. and Keenlyside, N.: Influence of tropical Atlantic SST on the El Nino region, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-16024, https://doi.org/10.5194/egusphere-egu25-16024, 2025.
