EGU2020-3294, updated on 12 Jun 2020
https://doi.org/10.5194/egusphere-egu2020-3294
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Influence of the North Pacific Victoria mode on the Madden–Julian Oscillation

Tao Wen1, Quanliang Chen1, Jianping Li2, Ruiqiang Ding3, Yu-heng Tseng4, and Zhaolu Hou2
Tao Wen et al.
  • 1Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, Chengdu University of Information Technology, Chengdu 610225, China
  • 2Laboratory for Regional Oceanography and Numerical Modeling, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266061, China
  • 3State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China
  • 4Institute of Oceanography, National Taiwan University, Taipei 10617, Taiwan

The influence of the North Pacific Victoria mode (VM) on the Madden–Julian Oscillation (MJO) are examined in this analysis. The results show that the February–April (FMA) VM had a significant influence on the development and propagation of the MJO over the equatorial central–western Pacific (ECWP) during spring (March–May) between 1979 and 2017. Specifically, MJO development was favored more by positive VM events than negative VM events. One probably description for these complicated connections is that the SST gradient anomalies associated with positive VM events enhance the convergence of low-level over the ECWP, which, combined with the warm SST anomalies (SSTAs) in the equatorial central Pacific that lead to a boost in the Kelvin wave anomalies, results in the enhanced MJO activity over the ECWP. These conclusions indicate that the VM is an important factor in MJO diversity.

How to cite: Wen, T., Chen, Q., Li, J., Ding, R., Tseng, Y., and Hou, Z.: Influence of the North Pacific Victoria mode on the Madden–Julian Oscillation, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-3294, https://doi.org/10.5194/egusphere-egu2020-3294, 2020

This abstract will not be presented.