Effects of nonmigrating diurnal tides on the Na layer in the mesosphere and lower thermosphere

J. Wu; J. Wu; J. Wu; W. Feng; W. Feng; X. Xue; X. Xue; X. Xue; X. Xue; D. R. Marsh; J. M. C. Plane

doi:10.5194/acp-24-12133-2024

Atmospheric Chemistry and Physics (Oct 2024)

Effects of nonmigrating diurnal tides on the Na layer in the mesosphere and lower thermosphere

J. Wu,
J. Wu,
J. Wu,
W. Feng,
W. Feng,
X. Xue,
X. Xue,
X. Xue,
X. Xue,
D. R. Marsh,
J. M. C. Plane

Affiliations

J. Wu: CAS Key Laboratory of Geospace Environment, School of Earth and Space Sciences, University of Science and Technology of China, 230026, Hefei, China
J. Wu: Mengcheng National Geophysical Observatory, School of Earth and Space Sciences, University of Science and Technology of China, 230026, Hefei, China
J. Wu: CAS Center for Excellence in Comparative Planetology, 230026, Hefei, China
W. Feng: School of Chemistry, University of Leeds, Leeds, LS2 9JT, UK
W. Feng: National Centre for Atmospheric Science, University of Leeds, Leeds, LS2 9JT, UK
X. Xue: CAS Key Laboratory of Geospace Environment, School of Earth and Space Sciences, University of Science and Technology of China, 230026, Hefei, China
X. Xue: Mengcheng National Geophysical Observatory, School of Earth and Space Sciences, University of Science and Technology of China, 230026, Hefei, China
X. Xue: CAS Center for Excellence in Comparative Planetology, 230026, Hefei, China
X. Xue: Collaborative Innovation Center of Astronautical Science and Technology, 230026, Hefei, China
D. R. Marsh: School of Chemistry, University of Leeds, Leeds, LS2 9JT, UK
J. M. C. Plane: School of Chemistry, University of Leeds, Leeds, LS2 9JT, UK

DOI: https://doi.org/10.5194/acp-24-12133-2024
Journal volume & issue: Vol. 24
pp. 12133 – 12141

Abstract

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The influence of nonmigrating diurnal tides on Na layer variability in the mesosphere and lower thermosphere regions is investigated for the first time using data from the Optical Spectrograph and InfraRed Imaging System (OSIRIS) on the Odin satellite and Specified Dynamics Whole Atmosphere Community Climate Model (SD-WACCM) with metal chemistry. The Na density from OSIRIS exhibits a clear longitudinal variation indicative of the presence of tidal components. Similar variability is seen in the SD-WACCM result. Analysis shows a significant relationship between the nonmigrating diurnal tides in Na density and the corresponding temperature tidal signal. Below 90 km, the three nonmigrating diurnal tidal components in Na density show a significant positive correlation with the temperature tides. Conversely, the phase mainly indicates a negative correlation above 95 km. Around the metal layer peak, the response of the Na density to a 1 K change in tidal temperature is estimated to be 120 cm−3.

Published in Atmospheric Chemistry and Physics

ISSN: 1680-7316 (Print); 1680-7324 (Online)
Publisher: Copernicus Publications
Country of publisher: Germany
LCC subjects: Science: Physics; Science: Chemistry
Website: http://www.atmospheric-chemistry-and-physics.net/

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