A warm layer in the nightside mesosphere of Mars - INSU - Institut national des sciences de l'Univers Access content directly
Journal Articles Geophysical Research Letters Year : 2020

A warm layer in the nightside mesosphere of Mars


We report a new set of stellar occultation measurements for nightside temperature profiles made by the MAVEN/IUVS that provide evidence for a recurring layer of warm air between 70‐90 km altitudes in the nightside mesosphere of Mars during Ls = 0° ‐ 180° in Martian Year 33‐34. The nightside profiles reveal a recurring peak of atmospheric temperature around 80 km over the equator to the middle latitudes in the northern hemisphere. The predictions of the Mars Climate Database have a warm layer with much smaller amplitudes. The observed peak amplitudes are larger than those predicted by the model by up to 90 K. Wavenumber‐3 structures are seen in the warm layer that are potentially signatures of thermal tides or stationary planetary waves, with amplitudes two‐times larger than predicted.
Fichier principal
Vignette du fichier
2019GL085646.pdf (6.55 Mo) Télécharger le fichier
Origin : Publisher files allowed on an open archive

Dates and versions

insu-02476853 , version 1 (29-03-2021)



Hiromu Nakagawa, Sonal K. Jain, Nicholas M. Schneider, Franck Montmessin, Roger V. Yelle, et al.. A warm layer in the nightside mesosphere of Mars. Geophysical Research Letters, 2020, 47 (4), pp.e2019GL085646. ⟨10.1029/2019GL085646⟩. ⟨insu-02476853⟩
90 View
26 Download



Gmail Facebook X LinkedIn More