Infragravity Wave Generation by Wind Gusts

T. Vrećica, R. Soffer, Y. Toledo

Research output: Contribution to journalArticlepeer-review


Through the analysis of propagation times of infragravity wave packets along ray paths, reanalysis data, and our field measurements in the East Mediterranean, we find evidence of deep water infragravity wave generation by offshore storms. We confirmed the results also using deep water pressure cell measurements in the Pacific. The known nearshore generation mechanism showed large discrepancies with the observed infragravity energy near Aogashima, Japan, during winter. A new model of deep water infragravity wave generation is developed, based on nonlinear interactions of wind wave triads with submesoscale wind oscillations. The observed underprediction of infragravity waves is resolved using this new gustiness-based model. The new source term is found to be of importance during strong storms in the open ocean and underlines the importance of accounting for submesoscale wind oscillations in wind wave models.

Original languageEnglish
Pages (from-to)9728-9738
Number of pages11
JournalGeophysical Research Letters
Issue number16
StatePublished - 28 Aug 2019


  • infragravity waves
  • nonlinear wave interactions
  • wind gust
  • wind waves

All Science Journal Classification (ASJC) codes

  • Geophysics
  • General Earth and Planetary Sciences


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