Modulation by the Atlantic Multidecadal Oscillation of the intensity of the interannual seesaw between the Somali and Australian cross-equatorial flows

Atmospheric and Oceanic Science Letters

Shuanglin LI¹  Ying CHEN¹  Chen LI² 

[1] Chengdu University of Information and Technology;Climate Change Research Center and Nansen-Zhu International Research Centre, Institute of Atmospheric Physics, Chinese Academy of Sciences;

关键词: Cross-equatorial flow;    ENSO;    Atlantic Multidecadal Oscillation;    East Asian summer rainfall;   

DOI  :  10.1080/16742834.2017.1328971

来源: DOAJ

【 摘 要 】

The decadal variation of the intensity of the interannual opposite connection (seesaw) between the Somali and Australian cross-equatorial flows (CEFs) is investigated. During the period prior to the mid-1960s, and after the early-2000s, the intensity of the interannual seesaw connection is significantly weaker relative to the period between. Such interdecadal shifts in the interannual seesaw intensity bear a resemblance to the decadal shift in ENSO’s strength, and can be further attributed to the phase transition of the Atlantic Multidecadal Oscillation (AMO). When the AMO is in a positive phase, the ENSO amplitude reduces and the seesaw strength becomes weakened, and vice versa. The historical simulation outputs of the CMIP5 models are used to verify the connection, and a similar result was obtained. Thus, the notion that the intensity of the interannual opposite connection (seesaw) between the CEFs is modulated by the AMO is robust.

【 授权许可】

Unknown