Coupling between maximum temperature and ozone levels in the lower stratosphere and extreme cooling events in Northeast China

Coupling between maximum temperature and ozone levels in the lower stratosphere and extreme cooling events in Northeast China | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Coupling between maximum temperature and ozone levels in the lower stratosphere and extreme cooling events in Northeast China Yu Shi, Oleksandr Evtushevsky, Gennadi Milinevsky, Ruixian Yu, and 3 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4080804/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract The little studied vertical temperature structure between the lower stratosphere and the surface during extreme cooling events in Northeast China is analyzed. Minimum diurnal temperatures in Changchun (44°N, 125°E) in January 2011, 2016, 2018 and 2023 were taken from Meteostat data. NCEP–NCAR reanalysis temperatures in the meridional cross-section between the pressure levels of 1000 hPa and 10 hPa, averaged over 120–130°E, and horizontally at 30–90°N are considered. Meridional profiles of ozone concentration are based on MLS observations and ERA5 reanalysis. In January of the four winters, the temperature in Changchun dropped by 15–24°C, and the coldest days were compared to the warmest days. It has been shown that there were (i) a concerted downward movement of vertical temperature and ozone maxima to the lower stratosphere, (ii) the tropopause descent by about 2–3 km below the warmest lower stratosphere and (iii) pushing down of the cold midtropospheric layer from about 4 km to the surface with the occurrence of extremely cold weather (–28°C to –34°C). Due to the action of stationary planetary waves, the large wave ridge provides a deep southward penetration of cold polar air into Northeast China, bringing the lowest January temperature among the midlatitude regions. Our results highlight the persistent vertical structure of the thermal coupling between the lower midlatitude stratosphere and the surface over four coolings and the role of peak stratospheric temperature and ozone levels in the occurrence of extremely cold weather. Stratosphere–troposphere coupling Lower stratosphere warming Ozone Tropopause descent Extreme cooling events Full Text Supplementary Files shiSupplementaryInformation14Mar2024.pdf Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-4080804","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":279689450,"identity":"76d4dafd-3436-4966-90c7-adb29a95215e","order_by":0,"name":"Yu Shi","email":"","orcid":"","institution":"Jilin University","correspondingAuthor":false,"prefix":"","firstName":"Yu","middleName":"","lastName":"Shi","suffix":""},{"id":279689451,"identity":"99299d62-fcef-417d-bddf-2d9017105050","order_by":1,"name":"Oleksandr Evtushevsky","email":"","orcid":"","institution":"Taras Shevchenko National University of Kyiv: Kiivs'kij nacional'nij universitet 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