EGUsphere EGUsphere EGUsphere EGUsphere Copernicus Publications Göttingen, Germany 10.5194/egusphere-2026-6900 Day-To-Day Variability of Nonmigrating Tides Derived from Sparse Meteor Radar Data Wang Jianyuan https://orcid.org/0000-0001-5600-050X 1 2 Yi Wen https://orcid.org/0000-0003-3717-6811 3 4 Xue Xianghui https://orcid.org/0000-0002-4541-9900 3 4 5 6 He Maosheng https://orcid.org/0000-0001-6112-2499 2 Wu Jianfei https://orcid.org/0000-0002-3998-9296 3 4 Ye Hailun 3 4 Chen Tingdi 3 4 Li Jian 3 4 Zeng Jie https://orcid.org/0000-0002-3146-3281 3 4 Ding Zonghua 7 Li Na https://orcid.org/0000-0002-6747-5620 8 Wang Jian 9 Vincent Robert A. https://orcid.org/0000-0001-6559-6544 10 Reid Iain M. https://orcid.org/0000-0003-2340-9047 10 11 Batista Paulo P. https://orcid.org/0000-0002-5448-5803 12 Buriti Ricardo A. https://orcid.org/0000-0002-0027-3565 13 Tsuda Toshitaka 14 Mitchell Nicholas J. 15 16 Dou Xiankang 5 School of Microelectronics, Tianjin University, Tianjin, China Sate Key Laboratory of Solar Activity and Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing, China School of Earth and Space Sciences, University of Science and Technology of China, Hefei, China CAS Center for Excellence in Comparative Planetology, Anhui Mengcheng Geophysics National Observation and Research Station, University of Science and Technology of China, Hefei, China Hefei National Laboratory, University of Science and Technology of China, Hefei, China Collaborate Innovation Center of Astronautical Science and Technology, Harbin, China Kunming Electro-Magnetic Environment Observation and Research Station, Qujing, China School of Electronic Science and Technology, Hainan University, Haikou, China School of Electrical and Electronic Engineering, North China Electric Power University, Beijing School of Physical Sciences, University of Adelaide, Adelaide, South Australia, Australia ATRAD Pty Ltd., Underdale, South Australia, Australia National Institute for Space Research, S. J. dos Campos, Brazil Federal University of Campina Grande, PB, Brazil Research Institute for Sustainable Humanosphere (RISH), Kyoto University, Uji, Kyoto, Japan Department of Electronic and Electrical Engineering, University of Bath, Bath, UK British Antarctic Survey, Cambridge, UK 12 11 2026 2026 1 27 Copyright: © 2026 Jianyuan Wang et al. 2026 This work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/4.0/ This article is available from https://egusphere.copernicus.org/preprints/2026/egusphere-2026-6900/ The full text article is available as a PDF file from https://egusphere.copernicus.org/preprints/2026/egusphere-2026-6900/egusphere-2026-6900.pdf

Horizontal winds from six meteor radars during 2005–2012 are used to derive nonmigrating tides in the mesosphere and lower thermosphere (MLT). To our knowledge, it is the first time to derive dominant nonmigrating tides from sparse meteor radar observations. The radars are located at Cariri (7.4 °S, 36.5 °W), Kototabang (0.2 °S, 100.3 °E), Ascension Island (7.9 °S, 14.4 °W), Darwin (12.3 °S, 130.8 °E), Buckland Park (34.6 °S, 138.5 °E), and Kunming (25.6 °N, 103.8 °E). Tidal fitting simulations based on the Whole Atmosphere Community Climate Model (WACCM) winds indicate that DW1, DE3, DE2, and DW2 can be accurately decomposed from these radars. The dominant nonmigrating tides, DE3, DE2, and DW2, show pronounced seasonal and altitudinal variations, and their dominant Hough mode components are identified. The climatology of these tides is consistent with the Climatological Tidal Model of the Thermosphere (CTMT) output. During the 2006 stratospheric sudden warming (SSW) event, DE3 was suppressed during SSW development and recovered after SSW dissipation; DE2 was enhanced during SSW development and rapidly suppressed after SSW reach the maximum; DW2 was suppressed near the SSW central day and strongly enhanced 20 days later. This study develops a method to decompose dominant nonmigrating tidal winds by jointly analyzing six meteor radars and provides an observational basis for modeling tidal dynamics in the MLT and for investigating middle atmosphere-ionosphere coupling through nonmigrating tides.

 National Natural Science Foundation of China 42504167 National Natural Science Foundation of China 42574213