{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,25]],"date-time":"2026-06-25T06:37:03Z","timestamp":1782369423634,"version":"3.54.5"},"reference-count":69,"publisher":"MDPI AG","issue":"19","license":[{"start":{"date-parts":[[2022,9,21]],"date-time":"2022-09-21T00:00:00Z","timestamp":1663718400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["42075062"],"award-info":[{"award-number":["42075062"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["42130601"],"award-info":[{"award-number":["42130601"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["lzujbky-2021-ey04"],"award-info":[{"award-number":["lzujbky-2021-ey04"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Fundamental Research Funds for the Central Universities","award":["42075062"],"award-info":[{"award-number":["42075062"]}]},{"name":"Fundamental Research Funds for the Central Universities","award":["42130601"],"award-info":[{"award-number":["42130601"]}]},{"name":"Fundamental Research Funds for the Central Universities","award":["lzujbky-2021-ey04"],"award-info":[{"award-number":["lzujbky-2021-ey04"]}]},{"name":"Met Office CSSP-China Programme","award":["42075062"],"award-info":[{"award-number":["42075062"]}]},{"name":"Met Office CSSP-China Programme","award":["42130601"],"award-info":[{"award-number":["42130601"]}]},{"name":"Met Office CSSP-China Programme","award":["lzujbky-2021-ey04"],"award-info":[{"award-number":["lzujbky-2021-ey04"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>The Arctic stratospheric polar vortex is a key component of the climate system, which has significant impacts on surface temperatures in the mid-latitudes and polar regions. Therefore, understanding polar vortex variability is helpful for extended-range weather forecasting. The present study evaluates long-term changes in the position and strength of the polar vortex in the Arctic lower stratosphere during the winters from 1980\/81 to 2013\/14. Simulations of the Coupled Model Intercomparison Project Phase 6 (CMIP6) models are compared with Modern-Era Retrospective analysis for Research and Applications Version 2 (MERRA2) reanalysis dataset. Overall, the CMIP6 models well capture the spatial characteristics of the polar vortex with spatial correlation coefficients between the potential vorticity (PV) in the lower stratosphere from simulations and MERRA2 products generally greater than 0.85 for all CMIP6 models during winter. There is a good agreement in the position and shape of the polar vortex between the CMIP6 multi-model mean and MERRA2, although there exist differences between simulations of individual CMIP6 models. However, most CMIP6 models underestimate the strength of polar vortex in the lower stratosphere, with the largest negative bias up to about \u221220%. The present study further reveals that there is an anticorrelation between the polar vortex strength bias and area bias simulated by CMIP6 models. In addition, there is a positive correlation between the trend of EP-flux divergence for wavenumber one accumulated in early winter and the trend in zonal mean zonal wind averaged in late winter. As for the long-term change in polar vortex position, CanESM5, IPSL-CM5A2-INCA, UKESM1-0-LL, and IPSL-CM6A-LR well capture the persistent shift of polar vortex towards the Eurasian continent and away from North America in February, which has been reported in observations. These models reproduce the positive trend of wavenumber-1 planetary waves since the 1980s seen in the MERRA2 dataset. This suggests that realistic wave activity processes in CMIP6 models play a key role not only in the simulation of the strength of the stratospheric polar vortex but also in the simulation of the polar vortex position shift.<\/jats:p>","DOI":"10.3390\/rs14194701","type":"journal-article","created":{"date-parts":[[2022,9,22]],"date-time":"2022-09-22T23:07:55Z","timestamp":1663888075000},"page":"4701","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Evaluating Long-Term Variability of the Arctic Stratospheric Polar Vortex Simulated by CMIP6 Models"],"prefix":"10.3390","volume":"14","author":[{"given":"Siyi","family":"Zhao","sequence":"first","affiliation":[{"name":"Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8491-0225","authenticated-orcid":false,"given":"Jiankai","family":"Zhang","sequence":"additional","affiliation":[{"name":"Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chongyang","family":"Zhang","sequence":"additional","affiliation":[{"name":"Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mian","family":"Xu","sequence":"additional","affiliation":[{"name":"Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2714-1084","authenticated-orcid":false,"given":"James","family":"Keeble","sequence":"additional","affiliation":[{"name":"Department of Chemistry, University of Cambridge, Cambridge CB2 1TN, UK"},{"name":"National Centre for Atmospheric Science (NCAS), University of Cambridge, Cambridge CB2 1TN, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhe","family":"Wang","sequence":"additional","affiliation":[{"name":"Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xufan","family":"Xia","sequence":"additional","affiliation":[{"name":"Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,9,21]]},"reference":[{"key":"ref_1","first-page":"43","article-title":"Stratospheric polar vortices, in The Stratosphere: Dynamics, Transport, and Chemistry","volume":"190","author":"Waugh","year":"2010","journal-title":"Geophys. Monogr. Ser."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"37","DOI":"10.1175\/BAMS-D-15-00212.1","article-title":"What Is the Polar Vortex and How Does It Influence Weather?","volume":"98","author":"Waugh","year":"2017","journal-title":"Bull. Am. Meteorol. Soc."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1969","DOI":"10.1175\/1520-0442(2002)015<1969:TNTSC>2.0.CO;2","article-title":"The NAO troposphere-stratosphere connection","volume":"15","author":"Ambaum","year":"2002","journal-title":"J. Clim."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"2668","DOI":"10.1175\/JCLI-D-12-00030.1","article-title":"The influence of stratospheric vortex displacements and splits on surface climate","volume":"26","author":"Mitchell","year":"2013","journal-title":"J. Clim."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"5268","DOI":"10.1002\/grl.50927","article-title":"A practical method to identify displaced and split stratospheric polar vortex events","volume":"40","author":"Seviour","year":"2013","journal-title":"Geophys. Res. Lett."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"7739","DOI":"10.1002\/2014GL062179","article-title":"The effects of different sudden stratospheric warming types on the ocean","volume":"41","author":"Joshi","year":"2014","journal-title":"Geophys. Res. Lett."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"581","DOI":"10.1126\/science.1063315","article-title":"Stratospheric harbingers of anomalous weather regimes","volume":"294","author":"Baldwin","year":"2001","journal-title":"Science"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"4646","DOI":"10.1038\/ncomms5646","article-title":"Weakening of the stratospheric polar vortex by Arctic sea-ice loss","volume":"5","author":"Kim","year":"2014","journal-title":"Nat. Commun."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"627","DOI":"10.1038\/ngeo2234","article-title":"Recent Arctic amplification and extreme mid-latitude weather","volume":"7","author":"Cohen","year":"2014","journal-title":"Nat. Geosci."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"e2020JD033989","DOI":"10.1029\/2020JD033989","article-title":"The impact of split and displacement sudden stratospheric warmings on the troposphere","volume":"126","author":"White","year":"2021","journal-title":"J. Geophys. Res. Atmos."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"1857","DOI":"10.1175\/JCLI-D-18-0574.1","article-title":"The corresponding tropospheric environments during downward-extending and non-downward-extending events of stratospheric Northern Annular Mode anomalies","volume":"32","author":"Zhang","year":"2019","journal-title":"J. Clim."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"1148","DOI":"10.1002\/qj.3001","article-title":"The connection between extreme stratospheric polar vortex events and tropospheric blockings","volume":"143","author":"Huang","year":"2017","journal-title":"Q. J. R. Meteorol. Soc."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"3061","DOI":"10.1007\/s00382-017-4065-3","article-title":"Relationship between the North Pacific Gyre Oscillation and the onset of stratospheric final warming in the northern Hemisphere","volume":"51","author":"Hu","year":"2018","journal-title":"Clim. Dyn."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"e2021JD035759","DOI":"10.1029\/2021JD035759","article-title":"Is the relationship between stratospheric Arctic vortex and Arctic Oscillation steady?","volume":"126","author":"Hu","year":"2021","journal-title":"J. Geophys. Res. Atmos."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"2584","DOI":"10.1175\/1520-0442(2004)017<2584:TLCOTN>2.0.CO;2","article-title":"The life cycle of the Northern Hemisphere sudden stratospheric warmings","volume":"17","author":"Limpasuvan","year":"2004","journal-title":"J. Clim."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"886","DOI":"10.1002\/qj.620","article-title":"The association between stratospheric weak polar vortex events and cold air outbreaks in the Northern Hemisphere","volume":"136","author":"Kolstad","year":"2010","journal-title":"Q. J. R. Meteorol. Soc."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"1245","DOI":"10.1175\/JAS-D-18-0285.1","article-title":"Eurasian cold air outbreaks under different Arctic stratospheric polar vortex strengths","volume":"76","author":"Huang","year":"2019","journal-title":"J. Atmos. Sci."},{"key":"ref_18","doi-asserted-by":"crossref","unstructured":"Xie, J., Hu, J., Xu, H., Liu, S., and He, H. (2020). Dynamic Diagnosis of Stratospheric Sudden Warming Event in the Boreal Winter of 2018 and Its Possible Impact on Weather over North America. Atmosphere, 11.","DOI":"10.3390\/atmos11050438"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"4787","DOI":"10.1175\/JCLI-D-19-0663.1","article-title":"Impact of the Quasi-Biennial Oscillation on the Northern Winter Stratospheric Polar Vortex in CMIP5\/6 Models","volume":"33","author":"Rao","year":"2020","journal-title":"J. Clim."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"1094","DOI":"10.1038\/nclimate3136","article-title":"Persistent shift of the Arctic polar vortex towards the Eurasian continent in recent decades","volume":"6","author":"Zhang","year":"2016","journal-title":"Nat. Clim. Chang."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"5417","DOI":"10.1175\/JCLI-D-17-0695.1","article-title":"Preconditioning of Arctic stratospheric polar vortex shift events","volume":"31","author":"Huang","year":"2018","journal-title":"J. Clim."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"1594","DOI":"10.1175\/1520-0469(1999)056<1594:COAAAP>2.0.CO;2","article-title":"Climatology of Arctic and Antarctic polar vortices using elliptical diagnostics","volume":"56","author":"Waugh","year":"1999","journal-title":"J. Atmos. Sci."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"3548","DOI":"10.1175\/1520-0442(2004)017<3548:UWAFAA>2.0.CO;2","article-title":"Upward wave activity flux as a precursor to extreme stratospheric events and subsequent anomalous surface weather regimes","volume":"17","author":"Polvani","year":"2004","journal-title":"J. Clim."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"1920","DOI":"10.1175\/2008JCLI2548.1","article-title":"Stratosphere\u2013troposphere coupling in a relatively simple AGCM: The importance of stratospheric variability","volume":"22","author":"Gerber","year":"2009","journal-title":"J. Clim."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"902","DOI":"10.1175\/2008JAS2862.1","article-title":"Baroclinic Rossby Wave Forcing and Barotropic Rossby Wave Response to Stratospheric Vortex Variability","volume":"66","author":"Castanheira","year":"2009","journal-title":"J. Atmos. Sci."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"945","DOI":"10.1002\/2017GL076433","article-title":"Arctic sea ice loss in different regions leads to contrasting Northern Hemisphere impacts","volume":"45","author":"McKenna","year":"2018","journal-title":"Geophys. Res. Lett."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"3204","DOI":"10.1175\/JCLI3468.1","article-title":"A closer comparison of early and late-winter atmospheric trends in the Northern Hemisphere","volume":"18","author":"Hu","year":"2005","journal-title":"J. Clim."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"374","DOI":"10.1002\/2016GL072035","article-title":"Stratospheric variability contributed to and sustained the recent hiatus in Eurasian winter warming","volume":"44","author":"Garfinkel","year":"2017","journal-title":"Geophys. Res. Lett."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"1697","DOI":"10.1038\/s41467-018-04138-3","article-title":"Recent strengthening of the stratospheric Arctic vortex response to warming in the central North Pacific","volume":"9","author":"Hu","year":"2018","journal-title":"Nat. Commun."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"3367","DOI":"10.1007\/s00382-014-2110-z","article-title":"Extra-tropical atmospheric response to ENSO in the CMIP5 models","volume":"43","author":"Hurwitz","year":"2014","journal-title":"Clim. Dyn."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"4603","DOI":"10.1175\/JCLI-D-21-0694.1","article-title":"Mean State of the Northern Hemisphere Stratospheric Polar Vortex in Three Generations of CMIP Models","volume":"35","author":"Rao","year":"2022","journal-title":"J. Clim."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"e2021GL094083","DOI":"10.1029\/2021GL094083","article-title":"CMIP6 models underestimate the Holton-Tan effect","volume":"48","author":"Elsbury","year":"2021","journal-title":"Geophys. Res. Lett."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"5235","DOI":"10.1175\/JCLI-D-18-0603.1","article-title":"Diversity of the Wintertime Arctic Oscillation Pattern among CMIP5 Models: Role of the Stratospheric Polar Vortex","volume":"32","author":"Gong","year":"2019","journal-title":"J. Clim."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"2494","DOI":"10.1002\/jgrd.50125","article-title":"On the lack of stratospheric dynamical variability in low-top versions of the CMIP5 models","volume":"118","author":"Baldwin","year":"2013","journal-title":"J. Geophys. Res. Atmos."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"8481","DOI":"10.1175\/JCLI-D-17-0520.1","article-title":"The Importance of a Properly Represented Stratosphere for Northern Hemisphere Surface Variability in the Atmosphere and the Ocean","volume":"31","author":"Haase","year":"2018","journal-title":"J. Clim."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"5529","DOI":"10.1175\/JCLI-D-16-0465.1","article-title":"Defining Sudden Stratospheric Warming in Climate Models: Accounting for Biases in Model Climatologies","volume":"30","author":"Kim","year":"2017","journal-title":"J. Clim."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"10305","DOI":"10.1175\/JCLI-D-20-0104.1","article-title":"Variations in the Frequency of Stratospheric Sudden Warmings in CMIP5 and CMIP6 and Possible Causes","volume":"33","author":"Wu","year":"2020","journal-title":"J. Clim."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"e2021JD034759","DOI":"10.1029\/2021JD034759","article-title":"Persistent model biases in the CMIP6 representation of stratospheric polar vortex variability","volume":"126","author":"Hall","year":"2021","journal-title":"J. Geophys. Res. Atmos."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"10531","DOI":"10.5194\/acp-20-10531-2020","article-title":"The effect of interactive ozone chemistry on weak and strong stratospheric polar vortex events","volume":"20","author":"Oehrlein","year":"2020","journal-title":"Atmos. Chem. Phys."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"1937","DOI":"10.5194\/gmd-9-1937-2016","article-title":"Overview of the Coupled Model Intercomparison Project Phase 6 (CMIP6) experimental design and organization","volume":"9","author":"Eyring","year":"2015","journal-title":"Geosci. Model Dev."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"5419","DOI":"10.1175\/JCLI-D-16-0758.1","article-title":"The Modern-Era Retrospective Analysis for Research and Applications, version 2 (MERRA-2)","volume":"30","author":"Gelaro","year":"2017","journal-title":"J. Clim."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"553","DOI":"10.1002\/qj.828","article-title":"The ERA-Interim reanalysis: Configuration and performance of the data assimilation system","volume":"137","author":"Dee","year":"2011","journal-title":"Q. J. R. Meteorol. Soc."},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"3264","DOI":"10.1002\/2017GL076770","article-title":"Historical tropospheric and stratospheric ozone radiative forcing using the CMIP6 database","volume":"45","author":"Hegglin","year":"2018","journal-title":"Geophys. Res. Lett."},{"key":"ref_44","unstructured":"Danek, C., Shi, X., Stepanek, C., Yang, H., Barbi, D., Hegewald, J., and Lohmann, G. (2022, June 01). AWI AWI-ESM1.1LR Model Output Prepared for CMIP6 CMIP Historical. Version 20201101. Earth System Grid Federation. Available online: wdc-climate.de."},{"key":"ref_45","unstructured":"Swart, N.C., Cole, J.N.S., Kharin, V.V., Lazare, M., Scinocca, J.F., Gillett, N.P., Anstey, J., Arora, V., Christian, J.R., and Jiao, Y. (2022, June 01). CCCma CanESM5 Model Output Prepared for CMIP6 CMIP Historical. Version 20190429. Earth System Grid Federation. Available online: wdc-climate.de."},{"key":"ref_46","unstructured":"Danabasoglu, G. (2022, June 01). NCAR CESM2-WACCM Model Output Prepared for CMIP6 CMIP Historical. Version 20201101. Earth System Grid Federation. Available online: wdc-climate.de."},{"key":"ref_47","unstructured":"EC-Earth Consortium (EC-Earth) (2022, June 01). EC-Earth-Consortium EC-Earth3 Model Output Prepared for CMIP6 CMIP Historical. Version 20190711. Earth System Grid Federation. Available online: wdc-climate.de."},{"key":"ref_48","unstructured":"Krasting, J.P., John, J.G., Blanton, C., McHugh, C., Nikonov, S., Radhakrishnan, A., Rand, K., Zadeh, N.T., Balaji, V., and Durachta, J. (2022, June 01). NOAA-GFDL GFDL-ESM4 Model Output Prepared for CMIP6 CMIP Historical. Version 20201101. Earth System Grid Federation. Available online: wdc-climate.de."},{"key":"ref_49","unstructured":"Ridley, J., Menary, M., Kuhlbrodt, T., Andrews, M., and Andrews, T. (2022, June 01). MOHC HadGEM3-GC31-LL Model Output Prepared for CMIP6 CMIP. Version 20201101. Earth System Grid Federation. Available online: wdc-climate.de."},{"key":"ref_50","unstructured":"Volodin, E., Mortikov, E., Gritsun, A., Lykossov, V., Galin, V., Diansky, N., Gusev, A., Kostrykin, S., Iakovlev, N., and Shestakova, A. (2022, June 01). INM INM-CM5-0 Model Output Prepared for CMIP6 CMIP Historical. Version 20201101. Earth System Grid Federation. Available online: wdc-climate.de."},{"key":"ref_51","unstructured":"Boucher, O., Denvil, S., Levavasseur, G., Cozic, A., Caubel, A., Foujols, M., Meurdesoif, Y., Balkanski, Y., Checa-Garcia, R., and Hauglustaine, D. (2022, June 01). IPSL IPSL-CM5A2-INCA Model Output Prepared for CMIP6 CMIP Historical. Version 20201101. Earth System Grid Federation. Available online: wdc-climate.de."},{"key":"ref_52","unstructured":"Boucher, O., Denvil, S., Caubel, A., and Foujols, M.A. (2022, June 01). IPSL IPSL-CM6A-LR Model Output Prepared for CMIP6 CMIP Historical. Version 20201101. Earth System Grid Federation. Available online: wdc-climate.de."},{"key":"ref_53","unstructured":"Boucher, O., Denvil, S., Levavasseur, G., Cozic, A., Caubel, A., Foujols, M.-A., Meurdesoif, Y., Balkanski, Y., Checa-Garcia, R., and Hauglustaine, D. (2022, June 01). IPSL IPSL-CM6A-LR-INCA Model Output Prepared for CMIP6 CMIP Historical. Version 20201101. Earth System Grid Federation. Available online: wdc-climate.de."},{"key":"ref_54","unstructured":"Tatebe, H., and Watanabe, M. (2022, June 01). MIROC MIROC6 Model Output Prepared for CMIP6 CMIP Historical. Version 20201101. Earth System Grid Federation. Available online: wdc-climate.de."},{"key":"ref_55","unstructured":"Neubauer, D., Ferrachat, S., Siegenthaler-Le Drian, C., Stoll, J., Folini, D.S., Tegen, I., Wieners, K.-H., Mauritsen, T., Stemmler, I., and Barthel, S. (2022, June 01). HAMMOZ-Consortium MPI-ESM1.2-HAM Model Output Prepared for CMIP6 CMIP Historical. Version 20201101. Earth System Grid Federation. Available online: wdc-climate.de."},{"key":"ref_56","unstructured":"Jungclaus, J., Bittner, M., Wieners, K.-H., Wachsmann, F., Schupfner, M., Legutke, S., Giorgetta, M., Reick, C., Gayler, V., and Haak, H. (2022, June 01). MPI-M MPI-ESM1.2-HR Model Output Prepared for CMIP6 CMIP Historical. Version 20201101. Earth System Grid Federation. Available online: wdc-climate.de."},{"key":"ref_57","unstructured":"Seland, \u00d8., Bentsen, M., Olivi\u00e8, D.J.L., Toniazzo, T., Gjermundsen, A., Graff, L.S., Debernard, J.B., Gupta, A.K., He, Y., and Kirkev\u00e5g, A. (2022, June 01). NCC NorESM2-LM Model Output Prepared for CMIP6 CMIP Historical. Version 20201101. Earth System Grid Federation. Available online: wdc-climate.de."},{"key":"ref_58","unstructured":"Bentsen, M., Olivi\u00e8, D.J.L., Seland, O., Toniazzo, T., Gjermundsen, A., Graff, L.S., Debernard, J.B., Gupta, A.K., He, Y., and Kirkev\u00e5g, A. (2022, June 01). NCC NorESM2-MM Model Output Prepared for CMIP6 CMIP Historical. Version 20201101. Earth System Grid Federation. Available online: wdc-climate.de."},{"key":"ref_59","unstructured":"Tang, Y., Rumbold, S., Ellis, R., Kelley, D., Mulcahy, J., Sellar, A., Walton, J., and Jones, C. (2022, June 01). MOHC UKESM1.0-LL Model Output Prepared for CMIP6 CMIP Historical. Version 20201101. Earth System Grid Federation. Available online: wdc-climate.de."},{"key":"ref_60","doi-asserted-by":"crossref","first-page":"9471","DOI":"10.1029\/96JD00066","article-title":"An objective determination of the polar vortex using Ertel\u2019s potential vorticity","volume":"101","author":"Nash","year":"1996","journal-title":"J. Geophys. Res. Atmos."},{"key":"ref_61","doi-asserted-by":"crossref","first-page":"12568","DOI":"10.1029\/2019JD030966","article-title":"Seasonal evolution of the quasi-biennial oscillation impact on the Northern Hemisphere polar vortex in winter","volume":"124","author":"Zhang","year":"2019","journal-title":"J. Geophys. Res. Atmos."},{"key":"ref_62","unstructured":"Andrews, D.G., Holton, J.R., and Leovy, C.B. (1987). Middle Atmosphere Dynamics, Academic Press."},{"key":"ref_63","doi-asserted-by":"crossref","first-page":"7183","DOI":"10.1029\/2000JD900719","article-title":"Summarizing multiple aspects of model performance in a single diagram","volume":"106","author":"Taylor","year":"2001","journal-title":"J. Geophys. Res. Atmos."},{"key":"ref_64","doi-asserted-by":"crossref","first-page":"19375","DOI":"10.3402\/tellusa.v65i0.19375","article-title":"Stratospheric response to Arctic sea ice retreat and associated planetary wave propagation changes","volume":"65","author":"Ralf","year":"2013","journal-title":"Tellus A Dyn. Meteorol. Oceanogr."},{"key":"ref_65","doi-asserted-by":"crossref","first-page":"D14110","DOI":"10.1029\/2004JD005669","article-title":"Relationship between stationary planetary wave activity and the East Asian winter monsoon","volume":"110","author":"Chen","year":"2005","journal-title":"J. Geophys. Res. Atmos."},{"key":"ref_66","doi-asserted-by":"crossref","first-page":"3365","DOI":"10.1002\/2017GL073071","article-title":"Weakening and shift of the Arctic stratospheric polar vortex: Internal variability or forced response?","volume":"44","author":"Seviour","year":"2017","journal-title":"Geophys. Res. Lett."},{"key":"ref_67","doi-asserted-by":"crossref","first-page":"1194","DOI":"10.1175\/2010JAS3555.1","article-title":"Characterizing the variability and extremes of the stratospheric polar vortices using 2D moment analysis","volume":"68","author":"Mitchell","year":"2011","journal-title":"J. Atmos. Sci."},{"key":"ref_68","doi-asserted-by":"crossref","first-page":"1167","DOI":"10.1007\/s00376-021-0442-2","article-title":"Evaluating the ozone valley over the Tibetan Plateau in CMIP6 models","volume":"39","author":"Zhang","year":"2022","journal-title":"Adv. Atmos. Sci."},{"key":"ref_69","doi-asserted-by":"crossref","first-page":"8310","DOI":"10.1029\/2001JD001527","article-title":"Interaction between dynamics and chemistry of ozone in the setup phase of the Northern Hemisphere polar vortex","volume":"107","author":"Kawa","year":"2002","journal-title":"J. Geophys. Res. Atmos."}],"container-title":["Remote Sensing"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2072-4292\/14\/19\/4701\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T00:36:08Z","timestamp":1760142968000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2072-4292\/14\/19\/4701"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,9,21]]},"references-count":69,"journal-issue":{"issue":"19","published-online":{"date-parts":[[2022,10]]}},"alternative-id":["rs14194701"],"URL":"https:\/\/doi.org\/10.3390\/rs14194701","relation":{},"ISSN":["2072-4292"],"issn-type":[{"value":"2072-4292","type":"electronic"}],"subject":[],"published":{"date-parts":[[2022,9,21]]}}}