Articles | Volume 43, issue 1
https://doi.org/10.5194/angeo-43-1-2025
https://doi.org/10.5194/angeo-43-1-2025
Regular paper
 | 
06 Jan 2025
Regular paper |  | 06 Jan 2025

Investigating the role of gravity waves in mesosphere and lower-thermosphere (MLT) inversions at low latitudes

Chalachew Lingerew and U. Jaya Prakash Raju

Related subject area

Subject: Terrestrial atmosphere and its relation to the sun | Keywords: Middle atmosphere dynamics
Propagating characteristics of mesospheric gravity waves observed by an OI 557.7 nm airglow all-sky camera at Mt. Bohyun (36.2° N, 128.9° E)
Jun-Young Hwang, Young-Sook Lee, Yong Ha Kim, Hosik Kam, Seok-Min Song, Young-Sil Kwak, and Tae-Yong Yang
Ann. Geophys., 40, 247–257, https://doi.org/10.5194/angeo-40-247-2022,https://doi.org/10.5194/angeo-40-247-2022, 2022
Short summary
Modelling the residual mean meridional circulation at different stages of sudden stratospheric warming events
Andrey V. Koval, Wen Chen, Ksenia A. Didenko, Tatiana S. Ermakova, Nikolai M. Gavrilov, Alexander I. Pogoreltsev, Olga N. Toptunova, Ke Wei, Anna N. Yarusova, and Anton S. Zarubin
Ann. Geophys., 39, 357–368, https://doi.org/10.5194/angeo-39-357-2021,https://doi.org/10.5194/angeo-39-357-2021, 2021
Short summary
Stratospheric influence on the mesosphere–lower thermosphere over mid latitudes in winter observed by a Fabry–Perot interferometer
Olga S. Zorkaltseva and Roman V. Vasilyev
Ann. Geophys., 39, 267–276, https://doi.org/10.5194/angeo-39-267-2021,https://doi.org/10.5194/angeo-39-267-2021, 2021
Short summary
Migrating and non-migrating tides observed in the stratosphere from FORMOSAT-3/COSMIC temperature retrievals
Uma Das, William E. Ward, Chen Jeih Pan, and Sanat Kumar Das
Ann. Geophys., 38, 421–435, https://doi.org/10.5194/angeo-38-421-2020,https://doi.org/10.5194/angeo-38-421-2020, 2020
Short summary
Local stratopause temperature variabilities and their embedding in the global context
Ronald Eixmann, Vivien Matthias, Josef Höffner, Gerd Baumgarten, and Michael Gerding
Ann. Geophys., 38, 373–383, https://doi.org/10.5194/angeo-38-373-2020,https://doi.org/10.5194/angeo-38-373-2020, 2020
Short summary

Cited articles

Bègue, N., Mbatha, N., Bencherif, H., Loua, R. T., Sivakumar, V., and Leblanc, T.: Statistical analysis of the mesospheric inversion layers over two symmetrical tropical sites: Réunion (20.8° S, 55.5° E) and Mauna Loa (19.5° N, 155.6° W), Ann. Geophys., 35, 1177–1194, https://doi.org/10.5194/angeo-35-1177-2017, 2017. 
Bizuneh, C. L., Prakash, R., and Nigussie, M.: Long-term temperature and ozone response to natural drivers in the mesospheric region using 16 years (2005–2020) of TIMED/SABER observation data at 5–15° N, Adv. Space Res., 70, 2095–2111, https://doi.org/10.1016/j.asr.2022.06.051, 2022. 
Collins, J., Smith, A., Johnson, B., and Brown, C.: Dynamics of the middle atmosphere and its impact on weather systems, J. Atmos. Sol.-Terr. Phy., 120, 45–59, https://doi.org/10.1016/j.jastp.2014.01.005, 2014. 
Collins, R. L., Lehmacher, G. A., Larsen, M. F., and Mizutani, K.: Estimates of vertical eddy diffusivity in the upper mesosphere in the presence of a mesospheric inversion layer, Ann. Geophys., 29, 2019–2029, https://doi.org/10.5194/angeo-29-2019-2011, 2011. 
Cutler, L. J., Collins, R. L., Mizutani, K., and Itabe, T.: Rayleigh lidar observations of mesospheric inversion layers at Poker Flat, Alaska (65° N, 14° W), Geophys. Res. Lett., 28, 1467–1470, https://doi.org/10.1029/2000GL012535, 2001. 
Download
Short summary
The study uses data from soundings of the SABER satellite to examine the mesospheric inversion layer (MIL) and the related gravity wave energy and instability. In the mesosphere and lower-thermosphere (MLT) region, upper inversions occur with less than 40 % frequency, while the lower inversions are below 20 %. High gravity wave energy (~100 J/kg) in the upper MLT (85–90 km) is linked to instability, driving inversion phenomena. Conversely, the trend is less pronounced in the lower-MLT region.