Stratospheric Gravity Waves as a Proxy for Hurricane Intensification: A Case Study of Weather Research and Forecast Simulation for Hurricane Joaquin

Xue Wu, Lars Hoffmann, Corwin J. Wright, Neil P. Hindley, Silvio Kalisch, M. Joan Alexander, Yinan Wang

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Abstract

We conducted simulations with a 4-km resolution for Hurricane Joaquin in 2015 using the weather research and forecast (WRF) model. The model data are used to study stratospheric gravity waves (GWs) generated by the hurricane and how they correlate with hurricane intensity. The simulation results show spiral GWs propagating upward and anticlockwise away from the hurricane center. GWs with vertical wavelengths up to 14 km are generated. We find that GW activity is more frequent and intense during hurricane intensification than during weakening, particularly for the most intense GW activity. There are significant correlations between the change of stratospheric GW intensity and hurricane intensity. Therefore, the emergence of intensive stratospheric GW activity may be considered a useful proxy for identifying hurricane intensification.

Original languageEnglish
Article numbere2021GL097010
JournalGeophysical Research Letters
Volume49
Issue number1
Early online date22 Dec 2021
DOIs
Publication statusPublished - 16 Jan 2022

Keywords

  • mesoscale model simulation
  • stratospheric gravity wave
  • tropical cyclone intensification

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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