Atmospheric Gravity Waves in Aeolus Wind Lidar Observations

T. P. Banyard, C. J. Wright, N. P. Hindley, G. Halloran, I. Krisch, B. Kaifler, L. Hoffmann

Research output: Contribution to journalArticlepeer-review

Abstract

Aeolus is the first Doppler wind lidar in space. It provides unique high-resolution measurements of horizontal wind in the sparsely observed upper-troposphere/lower-stratosphere (UTLS), with global coverage. In this study, Aeolus' ability to resolve atmospheric gravity waves (GWs) is demonstrated. The accurate representation of these small-scale waves is vital to properly simulate dynamics in global weather and climate models. In a case study over the Andes, Aeolus GW measurements show coherent phase structure from the surface to the lower stratosphere, with wind perturbations >10 ms−1, a vertical wavelength ∼8 km, and an along-track horizontal wavelength ∼900 km. Good agreement is found between Aeolus and co-located satellite, ground-based lidar and reanalysis data sets for this example. Our results show that data from satellites of this type can provide unique information on GW sources and propagation in the UTLS, filling a key knowledge gap that underlies known major deficiencies in weather and climate modeling.

Original languageEnglish
Article numbere2021GL092756
JournalGeophysical Research Letters
Volume48
Issue number10
Early online date29 Apr 2021
DOIs
Publication statusPublished - 19 May 2021

Keywords

  • Aeolus
  • gravity waves
  • lidar
  • stratosphere
  • troposphere
  • wind

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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