The teleconnection of extreme El Niño-Southern Oscillation (ENSO) events to the tropical North Atlantic in coupled climate models ...

• Main Authors: Casselman, Jake W., Lübbecke, Joke F., Bayr, Tobias, Huo, Wenjuan, Wahl, Sebastian, Domeisen, Daniela
• Format: Article in Journal/Newspaper
• Language: English
• Published: ETH Zurich 2023
• Subjects: North Atlantic
• Online Access: https://dx.doi.org/10.3929/ethz-b-000616049; http://hdl.handle.net/20.500.11850/616049

El Niño-Southern Oscillation (ENSO) is a major source for teleconnections, including towards the tropical North Atlantic (TNA) region, whereby TNA sea surface temperatures (SSTs) are positively correlated with ENSO in boreal spring following an ENSO event. However, the Pacific-Atlantic connection can be impacted by different ENSO characteristics, such as the amplitude, location, and timing of Pacific SST anomalies (SSTAs). Indeed, the TNA SSTAs may respond nonlinearly to strong and extreme El Niño events. However, observational data for the number of extreme ENSO events remain limited, restricting our ability to investigate the influence of observed extreme ENSO events. To overcome this issue and to further evaluate the nonlinearity of the TNA SSTA response, two coupled climate models are used, namely the Community Earth System Model version 1 - Whole Atmosphere Community Climate Model (CESM-WACCM) and the Flexible Ocean and Climate Infrastructure version 1 (FOCI). In both models the TNA SSTAs respond ... : Weather and Climate Dynamics, 4 (2) ...