{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,28]],"date-time":"2026-02-28T04:28:17Z","timestamp":1772252897499,"version":"3.50.1"},"reference-count":39,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2021,3,20]],"date-time":"2021-03-20T00:00:00Z","timestamp":1616198400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>The planetary wave activity in the stratosphere\u2013mesosphere during the Arctic major Sudden Stratospheric Warming (SSW) in February 2018 is discussed on the basis of microwave radiometer (MWR) measurements of carbon monoxide (CO) above Kharkiv, Ukraine (50.0\u00b0 N, 36.3\u00b0 E) and the Aura Microwave Limb Sounder (MLS) measurements of CO, temperature and geopotential heights. From the MLS data, eastward and westward migrations of wave 1\/wave 2 spectral components were differentiated, to which less attention was paid in previous studies. Abrupt changes in zonal wave spectra occurred with the zonal wind reversal near 10 February 2018. Eastward wave 1 and wave 2 were observed before the SSW onset and disappeared during the SSW event, when westward wave 1 became dominant. Wavelet power spectra of mesospheric CO variations showed statistically significant periods of 20\u201330 days using both MWR and MLS data. Although westward wave 1 in the mesosphere dominated with the onset of the SSW 2018, it developed independently of stratospheric dynamics. Since the propagation of upward planetary waves was limited in the easterly zonal flow in the stratosphere during SSW, forced planetary waves in the mid-latitude mesosphere may exist due to the instability of the zonal flow.<\/jats:p>","DOI":"10.3390\/rs13061190","type":"journal-article","created":{"date-parts":[[2021,3,21]],"date-time":"2021-03-21T23:47:41Z","timestamp":1616370461000},"page":"1190","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Planetary Wave Spectrum in the Stratosphere\u2013Mesosphere during Sudden Stratospheric Warming 2018"],"prefix":"10.3390","volume":"13","author":[{"given":"Yuke","family":"Wang","sequence":"first","affiliation":[{"name":"International Center of Future Science, College of Physics, Jilin University, Changchun 130012, China"}]},{"given":"Gennadi","family":"Milinevsky","sequence":"additional","affiliation":[{"name":"International Center of Future Science, College of Physics, Jilin University, Changchun 130012, China"},{"name":"Physics Faculty, Taras Shevchenko National University of Kyiv, 01601 Kyiv, Ukraine"},{"name":"National Antarctic Scientific Center, Department of Atmosphere Physics and Geospace, 01601 Kyiv, Ukraine"}]},{"given":"Oleksandr","family":"Evtushevsky","sequence":"additional","affiliation":[{"name":"Physics Faculty, Taras Shevchenko National University of Kyiv, 01601 Kyiv, Ukraine"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3335-0034","authenticated-orcid":false,"given":"Andrew","family":"Klekociuk","sequence":"additional","affiliation":[{"name":"Antarctic Climate Program, Australian Antarctic Division, Kingston 7050, Australia"},{"name":"Department of Physics, University of Adelaide, Adelaide 5005, Australia"}]},{"given":"Wei","family":"Han","sequence":"additional","affiliation":[{"name":"International Center of Future Science, College of Physics, Jilin University, Changchun 130012, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2545-9833","authenticated-orcid":false,"given":"Asen","family":"Grytsai","sequence":"additional","affiliation":[{"name":"Physics Faculty, Taras Shevchenko National University of Kyiv, 01601 Kyiv, Ukraine"}]},{"given":"Oleksandr","family":"Antyufeyev","sequence":"additional","affiliation":[{"name":"Department of Millimeter Radio Astronomy, Institute of Radio Astronomy, National Academy of Sciences of Ukraine, 61002 Kharkiv, Ukraine"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6972-2122","authenticated-orcid":false,"given":"Yu","family":"Shi","sequence":"additional","affiliation":[{"name":"International Center of Future Science, College of Physics, Jilin University, Changchun 130012, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2897-2736","authenticated-orcid":false,"given":"Oksana","family":"Ivaniha","sequence":"additional","affiliation":[{"name":"Physics Faculty, Taras Shevchenko National University of Kyiv, 01601 Kyiv, Ukraine"},{"name":"National Antarctic Scientific Center, Department of Atmosphere Physics and Geospace, 01601 Kyiv, Ukraine"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6529-5610","authenticated-orcid":false,"given":"Valerii","family":"Shulga","sequence":"additional","affiliation":[{"name":"International Center of Future Science, College of Physics, Jilin University, Changchun 130012, China"},{"name":"Department of Millimeter Radio Astronomy, Institute of Radio Astronomy, National Academy of Sciences of Ukraine, 61002 Kharkiv, Ukraine"}]}],"member":"1968","published-online":{"date-parts":[[2021,3,20]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1479","DOI":"10.1175\/1520-0469(1971)028<1479:ADMOTS>2.0.CO;2","article-title":"A dynamical model of the stratospheric sudden warming","volume":"28","author":"Matsuno","year":"1971","journal-title":"J. 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