Quasi-2-Day Wave in Low-Latitude Atmospheric Winds as Viewed From the Ground and Space During January–March, 2020

Maosheng He, Jorge L. Chau, Jeffrey M. Forbes, Xiaoli Zhang, Christoph R. Englert, Brian J. Harding, Thomas J. Immel, Lourivaldo M. Lima, S. Vijaya Bhaskar Rao, M. Venkat Ratnam, Guozhu Li, John M. Harlander, Kenneth D. Marr, Jonathan J. Makela

Research output: Contribution to journalArticlepeer-review

Abstract

Horizontal winds from four low-latitude (±15°) specular meteor radars (SMRs) and the Michelson Interferometer for Global High-resolution Thermospheric Imaging (MIGHTI) instrument on the ICON satellite, are combined to investigate quasi-2-day waves (Q2DWs) in early 2020. SMRs cover 80–100 km altitude whereas MIGHTI covers 95–300 km. Q2DWs are the largest dynamical feature of the summertime middle atmosphere. At the overlapping altitudes, comparisons between the derived Q2DWs exhibit excellent agreement. The SMR sensor array analyses show that the dominant zonal wavenumbers are s = +2 and + 3, and help resolve ambiguities in MIGHTI results. We present the first Q2DW depiction for s = +2 and s = +3 between 95 and 200 km, and show that their amplitudes are almost invariant between 80 and 100 km. Above 106 km, Q2DW amplitudes and phases present structures that might result from the superposition of Q2DWs and their aliased secondary waves.

Original languageEnglish (US)
Article numbere2021GL093466
JournalGeophysical Research Letters
Volume48
Issue number13
DOIs
StatePublished - Jul 2021

Keywords

  • atmosphere ionosphere coupling
  • meteor radar winds
  • MIGHTI winds
  • MLT dynamics
  • non-linear interactions of waves
  • Quasi two day waves

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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