前 11 月 AO 对春季 AO 与随后冬季厄尔尼诺-南方涛动（ENSO）关系的调制作用。

Modulation of the relationship between spring AO and the subsequent winter ENSO by the preceding November AO.

机构信息

Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China.

Climate Research Division, Environment and Climate Change Canada, Toronto, ON, Canada.

出版信息

Sci Rep. 2018 May 2;8(1):6943. doi: 10.1038/s41598-018-25303-0.

DOI:10.1038/s41598-018-25303-0

PMID:29720617

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5932071/

Abstract

Previous studies indicated that the spring Arctic Oscillation (AO) exerts significant influences on the subsequent winter El Niño-Southern Oscillation (ENSO). This analysis suggests that the spring AO-ENSO linkage is highly modulated by its preceding November AO. When November and the subsequent spring AO indices are in phase, the spring AO has a pronounced influence on ENSO. However, when the November and spring AO indices are out of phase, the spring AO-ENSO connection disappears. Modulation of the November AO on the spring AO-ENSO connection is mainly through the constructive and destructive superposition of the November and spring AO associated sea surface temperature (SST) anomalies in the tropical central-eastern Pacific in spring and summer, as well as the SST anomalies developed further in the tropical Pacific via the positive air-sea feedback.

摘要

先前的研究表明，春季北极涛动（AO）对随后的冬季厄尔尼诺-南方涛动（ENSO）有显著影响。本分析表明，春季 AO-ENSO 的联系受到其前一个 11 月 AO 的高度调制。当 11 月和随后的春季 AO 指数同相时，春季 AO 对 ENSO 有显著影响。然而，当 11 月和春季 AO 指数异相时，春季 AO-ENSO 联系消失。11 月 AO 对春季 AO-ENSO 联系的调制主要是通过 11 月和春季 AO 相关的热带中东部太平洋海表温度（SST）异常在春季和夏季的建设性和破坏性叠加，以及热带太平洋进一步发展的 SST 异常通过正的海气反馈。