Atlantic Multidecadal Oscillation Drives Interdecadal Pacific Variability via Tropical Atmospheric Bridge

نویسندگان

چکیده

Abstract The interdecadal Pacific oscillation (IPO) and Atlantic multidecadal (AMO), two leading modes of decadal climate variability, are not independent. It was proposed that ENSO-like sea surface temperature (SST) variations play a central role in the responses to AMO forcing. However, observational analyses indicate AMO-related SST anomalies tropical far weaker than those extratropical North Pacific. Here, we show is tied forcing by convective heating associated with precipitation over Pacific, instead there, based on an ensemble pacemaker experiments restored observation coupled general circulation model. modulates equatorial southwestern through exciting anomalous zonal interhemispheric asymmetry net moist static energy input into atmosphere. drives teleconnection, but it remarkably weakens thermocline damping effect. This study has implications IPO combined mode generated both local air–sea interactions, IPO-related global warming acceleration/slowdown independent AMO.

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ژورنال

عنوان ژورنال: Journal of Climate

سال: 2021

ISSN: ['1520-0442', '0894-8755']

DOI: https://doi.org/10.1175/jcli-d-20-0983.1