Ground-to-Stratopause Trapped Lee Waves Observed Downstream of the Kerguelen and Heard Islands.
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| Title: | Ground-to-Stratopause Trapped Lee Waves Observed Downstream of the Kerguelen and Heard Islands. |
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| Authors: | Eckermann, Stephen D.1 (AUTHOR) stephen.eckermann.civ@us.navy.mil, Broutman, Dave2 (AUTHOR), Doyle, James D.3 (AUTHOR) |
| Source: | Journal of the Atmospheric Sciences. Jan2026, Vol. 83 Issue 1, p87-103. 17p. |
| Subjects: | Mountain wave, Stratosphere, Ocean, Infrared radiometry, Atmospheric waves, Theory of wave motion, Islands |
| Abstract: | Thermal infrared satellite radiances acquired from stratospheric channels during regular Aqua satellite overpasses of the Southern Ocean in July 2014 revealed unusual short-wavelength structure extending many hundreds of kilometers downstream of the Kerguelen and Heard Islands. Although near the limits of detection in nadir swath imagery, careful analysis and cross validation verify the structure to be geophysical. Theory, reanalysis, modeling, and available observations are combined to show that these features are resonant trapped island lee waves established by successive downstream vertical reflections from a strong stratopause jet and the ocean surface. This is the first definitive proof that resonant trapped lee-wave disturbances can extend to stratopause altitudes at around 40–50 km. Possible implications of this new form of stratospheric wave dynamics are discussed. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | Thermal infrared satellite radiances acquired from stratospheric channels during regular Aqua satellite overpasses of the Southern Ocean in July 2014 revealed unusual short-wavelength structure extending many hundreds of kilometers downstream of the Kerguelen and Heard Islands. Although near the limits of detection in nadir swath imagery, careful analysis and cross validation verify the structure to be geophysical. Theory, reanalysis, modeling, and available observations are combined to show that these features are resonant trapped island lee waves established by successive downstream vertical reflections from a strong stratopause jet and the ocean surface. This is the first definitive proof that resonant trapped lee-wave disturbances can extend to stratopause altitudes at around 40–50 km. Possible implications of this new form of stratospheric wave dynamics are discussed. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 00224928 |
| DOI: | 10.1175/JAS-D-25-0087.1 |
