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

Tao Wen; Quanliang Chen; Jianping Li; Ruiqiang Ding; Yu-heng Tseng; Zhaolu Hou; Xumin Li

doi:10.3389/feart.2020.584001

Frontiers in Earth Science (Nov 2020)

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

Tao Wen,
Quanliang Chen,
Jianping Li,
Ruiqiang Ding,
Yu-heng Tseng,
Zhaolu Hou,
Xumin Li

Affiliations

Tao Wen: State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing, China
Quanliang Chen: Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, Chengdu University of Information Technology, Chengdu, China
Jianping Li: Laboratory for Regional Oceanography and Numerical Modeling, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
Ruiqiang Ding: State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing, China
Yu-heng Tseng: Institute of Oceanography, National Taiwan University, Taipei, Taiwan
Zhaolu Hou: Laboratory for Regional Oceanography and Numerical Modeling, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
Xumin Li: CIC-FEMD/ILCEC, Key Laboratory of Meteorological Disaster of Ministry of Education, School of Atmospheric Sciences, Nanjing University of Information Science and Technology, Nanjing, China

DOI: https://doi.org/10.3389/feart.2020.584001
Journal volume & issue: Vol. 8

Abstract

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Using the observational data and the Coupled Model Intercomparison Project phase 5 (CMIP5) models this study examined the influence of the North Pacific Victoria mode (VM) on the Madden–Julian Oscillation (MJO). The results show that the February–April 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. These complicated connections could have been caused by the SST gradient anomalies associated with positive VM events, enhancing the convergence of low-level over the ECWP. When this is combined with warm SST anomalies in the equatorial central Pacific it could have led to a boost in the Kelvin wave anomalies, resulting in enhanced MJO activity over the ECWP. These conclusions indicate that the VM is an important factor in MJO diversity.

Published in Frontiers in Earth Science

ISSN: 2296-6463 (Online)
Publisher: Frontiers Media S.A.
Country of publisher: Switzerland
LCC subjects: Science
Website: https://www.frontiersin.org/journals/earth-science

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