Wind-forced equatorial wave dynamics of the Pacific Ocean during 2014/2015 and 2015/2016 El Niño events

Jing WANG; Dongliang YUAN; Tengfei XU; Xia ZHAO

doi:10.1007/s00343-020-9329-9

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Wind-forced equatorial wave dynamics of the Pacific Ocean during 2014/2015 and 2015/2016 El Niño events

Physics | Updated：2023-04-27

- Wind-forced equatorial wave dynamics of the Pacific Ocean during 2014/2015 and 2015/2016 El Niño events
- Journal of Oceanology and Limnology Vol. 38, Issue 4, Pages: 1123-1137(2020)
- Affiliations：
  
  1.CAS Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
  2.Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266071, China
  3.Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
  4.First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
- Author bio：
  
  WANG Jing, wangjing@qdio.ac.cn
- Funds：
- DOI：10.1007/s00343-020-9329-9
  CLC：
- Received：20 December 2019，
  
  Accepted：16 March 2020，
  
  Online First：24 April 2020，
  
  Published：2020-07
- Accepted：
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Jing WANG, Dongliang YUAN, Tengfei XU, et al. Wind-forced equatorial wave dynamics of the Pacific Ocean during 2014/2015 and 2015/2016 El Niño events[J]. Journal of Oceanology and Limnology, 2020, 38(4): 1123-1137.
DOI：

Jing WANG, Dongliang YUAN, Tengfei XU, et al. Wind-forced equatorial wave dynamics of the Pacific Ocean during 2014/2015 and 2015/2016 El Niño events[J]. Journal of Oceanology and Limnology, 2020, 38(4): 1123-1137. DOI： 10.1007/s00343-020-9329-9.

摘要

Abstract

The equatorial wave dynamics of interannual sea level variations between 2014/2015 and 2015/2016 El Niño events are compared using the Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics

Institute of Atmospheric Physics Climate Ocean Model (LICOM) forced by the National Centers for Environmental Prediction (NCEP) reanalysis Ⅰ wind stress and heat flux during 2000-2015. In addition

the LICOM can reproduce the interannual variability of sea surface temperature anomalies (SSTA) and sea level anomalies (SLA) along the equator over the Pacific Ocean in comparison with the Hadley center and altimetric data well. We extracted the equatorial wave coefficients of LICOM simulation to get the contribution to SLA by multiplying the meridional wave structure. During 2014/2015 El Niño event

upwelling equatorial Kelvin waves from the western boundary in April 2014 reach the eastern Pacific Ocean

which weakened SLA in the eastern Pacific Ocean. However

no upwelling equatorial Kelvin waves from the western boundary of the Pacific Ocean could reach the eastern boundary during the 2015/2016 El Niño event. Linear wave model results also demonstrate that upwelling equatorial Kelvin waves in both 2014/2015 and 2015/2016 from the western boundary can reach the eastern boundary. However

the contribution from stronger westerly anomalies forced downwelling equatorial Kelvin waves overwhelmed that from the upwelling equatorial Kelvin waves from the western boundary in 2015. Therefore

the western boundary reflection and weak westerly wind burst inhibited the growth of the 2014/2015 El Niño event. The disclosed equatorial wave dynamics are important to the simulation and prediction of ENSO events in future studies.

关键词

Keywords

references

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