Service interruption on Monday 11 July from 12:30 to 13:00: all the sites of the CCSD (HAL, EpiSciences, SciencesConf, AureHAL) will be inaccessible (network hardware connection).
Skip to Main content Skip to Navigation
Journal articles

Delineating the Seasonally Modulated Nonlinear Feedback Onto ENSO From Tropical Instability Waves

Abstract : Tropical instability waves (TIWs), the dominant form of eddy variability in the tropics, have a peak period at about 5 weeks and are strongly modulated by both the seasonal cycle and El Niño-Southern Oscillation (ENSO). In this study, we first demonstrated that TIW-induced nonlinear dynamical heating (NDH) is basically proportional to the TIW amplitude depicted by a complex index for TIW. We further delineated that this NDH, capturing the seasonally modulated nonlinear feedback of TIW activity onto ENSO, is well approximated by a theoretical formulation derived analytically from a simple linear stochastic model for the TIW index. The results of this study may be useful for the climate community to evaluate and understand the TIW-ENSO multiscale interaction.
Complete list of metadata

https://hal-insu.archives-ouvertes.fr/insu-03671099
Contributor : Nathalie POTHIER Connect in order to contact the contributor
Submitted on : Wednesday, May 18, 2022 - 10:02:30 AM
Last modification on : Monday, July 4, 2022 - 9:10:37 AM

File

Geophysical Research Letters -...
Publisher files allowed on an open archive

Licence

Copyright

Identifiers

Collections

Citation

Aoyun Xue, Fei-Fei Jin, Wenjun Zhang, Julien Boucharel, Sen Zhao, et al.. Delineating the Seasonally Modulated Nonlinear Feedback Onto ENSO From Tropical Instability Waves. Geophysical Research Letters, 2020, 47, ⟨10.1029/2019GL085863⟩. ⟨insu-03671099⟩

Share

Metrics

Record views

37

Files downloads

1