edu.ucar.opensky::articles:24955 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T22:56:28.961525 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d76h4mzp https://doi.org/10.26024/rn3t-ep30 https Related Dataset #1 AMV idealized experiments Warm phase of AMV damps ENSO through weakened thermocline feedback 2021-12-16T00:00:00Z publication https://n2t.org/ark:/85065/d76h4mzp https://doi.org/10.1029/2021GL096149 Trascasa-Castro, P. author Ruprich-Robert, Y. author Castruccio, Frederic author Maycock, A. C. author UCAR/NCAR - Library publisher Interactions between ocean basins affect El Nino-Southern Oscillation (ENSO), altering its impacts on society. Here, we explore the effect of Atlantic Multidecadal Variability (AMV) on ENSO behavior using idealized experiments performed with the NCAR-CESM1 model. Comparing warm (AMV+) to cold (AMV-) AMV conditions, we find that ENSO sea surface temperature (SST) anomalies are reduced by similar to 10% and ENSO precipitation anomalies are shifted to the west during El Nino and east during La Nina. Using the Bjerknes stability index, we attribute the reduction in ENSO variability to a weakened thermocline feedback in boreal autumn. In AMV+, the Walker circulation and trade winds strengthen over the tropical Pacific, increasing the background zonal SST gradient. The background changes shift ENSO anomalies westwards, with wind stress anomalies more confined to the west. We suggest the changes in ENSO-wind stress decrease the strength of the thermocline feedback in the east, eventually reducing ENSO growth rate. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation