AUTHOR=Chen Shangfeng , Chen Wen , Ying Jun , Zheng Yuqiong , Lan Xiaoqing TITLE=Interdecadal Modulation of the Pacific Decadal Oscillation on the Relationship Between Spring Arctic Oscillation and the Following Winter ENSO JOURNAL=Frontiers in Earth Science VOLUME=9 YEAR=2022 URL=https://www.frontiersin.org/journals/earth-science/articles/10.3389/feart.2021.810285 DOI=10.3389/feart.2021.810285 ISSN=2296-6463 ABSTRACT=
Previous studies indicated that Arctic Oscillation (AO) in boreal spring is an important extratropical trigger for the outbreak of El Niño and Southern Oscillation (ENSO) events in the succedent winter. This study reveals that the Pacific Decadal Oscillation (PDO) has a strong modulation on the linkage between the spring AO and the following winter ENSO. Particularly, impact of the spring AO on the succedent winter ENSO is strong during positive PDO phase (+PDO). By contrast, the spring AO-winter ENSO connection is weak during negative PDO phase (−PDO). During +PDO, positive spring AO induces a marked anomalous cyclone over the subtropical North Pacific