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Dynamical coupling between the low-latitude lower thermosphere and ionosphere via the non-migrating diurnal tide as revealed by concurrent satellite observations and numerical modeling
  • +15
  • Federico Gasperini,
  • Irfan Azeem,
  • Geoff Crowley,
  • Michael Perdue,
  • Matthew Depew,
  • Thomas J. Immel,
  • Erik Stromberg,
  • Chad Fish,
  • Crystal Frazier,
  • Adam Reynolds,
  • Anthony Swenson,
  • Ted Tash,
  • Russell Gleason,
  • Ryan Blay,
  • Jordan Maxwell,
  • Keith Underwood,
  • Christian Frazier,
  • Scott Jensen
Federico Gasperini
ASTRA LLC, ASTRA LLC, ASTRA LLC

Corresponding Author:[email protected]

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Irfan Azeem
ASTRA LLC., ASTRA LLC., ASTRA LLC.
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Geoff Crowley
Atmospheric and Space Technology Research Associates, 12703 Spectrum Drive, Suite 101,San Antonio, TX 78249, USA., Atmospheric and Space Technology Research Associates, 12703 Spectrum Drive, Suite 101,San Antonio, TX 78249, USA., Atmospheric and Space Technology Research Associates, 12703 Spectrum Drive, Suite 101,San Antonio, TX 78249, USA.
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Michael Perdue
Georgia Institute of Technology, Georgia Institute of Technology, Georgia Institute of Technology
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Matthew Depew
University of Texas at Dallas, University of Texas at Dallas, University of Texas at Dallas
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Thomas J. Immel
University of California, Berkeley, University of California, Berkeley, University of California, Berkeley
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Erik Stromberg
ASTRA LLC., ASTRA LLC., ASTRA LLC.
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Chad Fish
Unknown, Unknown, Unknown
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Crystal Frazier
ASTRA LLC, ASTRA LLC, ASTRA LLC
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Adam Reynolds
ASTRA, ASTRA, ASTRA
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Anthony Swenson
ASTRA LLC, ASTRA LLC, ASTRA LLC
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Ted Tash
ASTRA LLC, ASTRA LLC, ASTRA LLC
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Russell Gleason
ASTRA LLC, ASTRA LLC, ASTRA LLC
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Ryan Blay
ASTRA LLC., ASTRA LLC., ASTRA LLC.
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Jordan Maxwell
ASTRA LLC, ASTRA LLC, ASTRA LLC
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Keith Underwood
ASTRA LLC, ASTRA LLC, ASTRA LLC
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Christian Frazier
ASTRA LLC, ASTRA LLC, ASTRA LLC
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Scott Jensen
ASTRA LLC, ASTRA LLC, ASTRA LLC
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Abstract

The diurnal-eastward propagating tide with zonal wavenumber 3 (DE3) has gained significant attention due to its ability to preferentially propagate to the ionosphere and thermosphere (IT) from the tropical troposphere, thus effectively coupling these atmospheric regions. In this work, we demonstrate the existence of a pronounced zonal wavenumber 4 (WN4) structure in the low-latitude ionosphere during May 27 - June 5, 2020 using concurrent in-situ total ion number density measurements from the Scintillation Observations and Response of The Ionosphere to Electrodynamics (SORTIE) and the Ionospheric Connection Explorer (ICON) satellites. Temperature observations from the Thermosphere Ionosphere Mesosphere Energetics Dynamics Sounding of the Atmosphere using Broadband Emission Radiometry (TIMED/SABER) instrument near 105 km and output from the Specified Dynamics Whole Atmosphere Community Climate Model with thermosphere and ionosphere eXtension (SD/WACCM-X) demonstrate that this global-scale ionospheric WN4 structure is due to DE3 propagating through the lower thermosphere.