Interbasin Interactions between the Pacific and Atlantic Oceans Depending on the Phase of Pacific Decadal Oscillation and Atlantic Multidecadal Oscillation

Abstract The authors investigated the interbasin interactions between Pacific and Atlantic Oceans depending on phase relationship of decadal oscillation (PDO)/Atlantic multidecadal (AMO) based observations idealized model experiments. When AMO PDO are in (i.e., +PDO/+AMO or ?PDO/?AMO), Ocean regulates SST anomalies equatorial with altering Walker circulation. During this period, there is a negative SST–precipitation where atmosphere forces ocean. In contrast, when they out either +PDO/?AMO ?PDO/+AMO), influences by modifying circulation, resulting westward shift center convective forcing compared to that during an in-phase PDO/AMO. positive dominant ocean atmosphere. To verify result, we conducted pacemaker experiments using Nanjing University Information Science Technology Earth System Model version 3 (NESM3). results supported our findings obtained from observations. We infer characteristics Pacific–Atlantic depend whether phases phase.