{"id":"https://openalex.org/W7225228804","doi":"https://doi.org/10.5194/egusphere-2026-6696","title":"Morphological Classification of the Lower Stratospheric Polar Vortex Edge as a Finite-Width Potential Vorticity Band","display_name":"Morphological Classification of the Lower Stratospheric Polar Vortex Edge as a Finite-Width Potential Vorticity Band","publication_year":2026,"publication_date":"2026-11-04","ids":{"openalex":"https://openalex.org/W7225228804","doi":"https://doi.org/10.5194/egusphere-2026-6696"},"language":"en","primary_location":{"id":"doi:10.5194/egusphere-2026-6696","doi":"https://doi.org/10.5194/egusphere-2026-6696","is_oa":true,"landing_page_url":"https://doi.org/10.5194/egusphere-2026-6696","pdf_url":null,"source":null,"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"acceptedVersion","is_accepted":true,"is_published":false,"raw_source_name":"EGUsphere","raw_type":"posted-content"},"volume":null,"type":"preprint","indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"https://doi.org/10.5194/egusphere-2026-6696","any_repository_has_fulltext":null},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5011901287","display_name":"Yonatan Givon","orcid":"https://orcid.org/0000-0003-1171-2823","observed_orcids":["https://orcid.org/0000-0003-1171-2823"]},"institutions":[{"id":"https://openalex.org/I35440088","display_name":"ETH Zurich","ror":"https://ror.org/05a28rw58","country_code":"CH","type":"education","lineage":["https://openalex.org/I2799323385","https://openalex.org/I35440088"]}],"countries":["CH"],"is_corresponding":false,"raw_author_name":"Yonatan Givon","raw_affiliation_strings":["ETH Zurich (Zurich, Switzerland)"],"raw_orcid":"https://orcid.org/0000-0003-1171-2823","affiliations":[{"raw_affiliation_string":"ETH Zurich (Zurich, Switzerland)","institution_ids":["https://openalex.org/I35440088"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5139087405","display_name":"Joanna Wesniuk","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Joanna Wesniuk","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"last","author":{"id":"https://openalex.org/A5061594564","display_name":"Robert C. J. Wills","orcid":"https://orcid.org/0000-0002-7776-2076","observed_orcids":["https://orcid.org/0000-0002-7776-2076"]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Robert C. J. Wills","raw_affiliation_strings":[],"raw_orcid":"https://orcid.org/0000-0002-7776-2076","affiliations":[]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":false,"cited_by_count":0,"citation_normalized_percentile":null,"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":null,"last_page":null},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11320","display_name":"Atmospheric Ozone and Climate","score":0.8647000193595886,"subfield":{"id":"https://openalex.org/subfields/1902","display_name":"Atmospheric Science"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11320","display_name":"Atmospheric Ozone and Climate","score":0.8647000193595886,"subfield":{"id":"https://openalex.org/subfields/1902","display_name":"Atmospheric Science"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10029","display_name":"Climate variability and models","score":0.09000000357627869,"subfield":{"id":"https://openalex.org/subfields/2306","display_name":"Global and Planetary Change"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10466","display_name":"Meteorological Phenomena and Simulations","score":0.014700000174343586,"subfield":{"id":"https://openalex.org/subfields/1902","display_name":"Atmospheric Science"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[],"concepts":[{"id":"https://openalex.org/C125405218","wikidata":"https://www.wikidata.org/wiki/Q1197111","display_name":"Polar vortex","level":3,"score":0.817300021648407},{"id":"https://openalex.org/C163861444","wikidata":"https://www.wikidata.org/wiki/Q108376","display_name":"Stratosphere","level":2,"score":0.8023999929428101},{"id":"https://openalex.org/C157331469","wikidata":"https://www.wikidata.org/wiki/Q1418563","display_name":"Potential vorticity","level":4,"score":0.7421000003814697},{"id":"https://openalex.org/C9075549","wikidata":"https://www.wikidata.org/wiki/Q40631","display_name":"Troposphere","level":2,"score":0.6830000281333923},{"id":"https://openalex.org/C49204034","wikidata":"https://www.wikidata.org/wiki/Q52139","display_name":"Climatology","level":1,"score":0.5766000151634216},{"id":"https://openalex.org/C91586092","wikidata":"https://www.wikidata.org/wiki/Q757520","display_name":"Atmospheric sciences","level":1,"score":0.5720000267028809},{"id":"https://openalex.org/C140820882","wikidata":"https://www.wikidata.org/wiki/Q732722","display_name":"Vortex","level":2,"score":0.5095000267028809},{"id":"https://openalex.org/C127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","level":0,"score":0.49300000071525574},{"id":"https://openalex.org/C29705727","wikidata":"https://www.wikidata.org/wiki/Q294562","display_name":"Polar","level":2,"score":0.4878000020980835},{"id":"https://openalex.org/C200114574","wikidata":"https://www.wikidata.org/wiki/Q1143513","display_name":"Vorticity","level":3,"score":0.47130000591278076},{"id":"https://openalex.org/C171420983","wikidata":"https://www.wikidata.org/wiki/Q186433","display_name":"Tropopause","level":3,"score":0.44920000433921814},{"id":"https://openalex.org/C145151356","wikidata":"https://www.wikidata.org/wiki/Q1053589","display_name":"Rossby wave","level":2,"score":0.4334000051021576},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.4120999872684479},{"id":"https://openalex.org/C134097258","wikidata":"https://www.wikidata.org/wiki/Q1507383","display_name":"Sea surface temperature","level":2,"score":0.3749000132083893},{"id":"https://openalex.org/C2780030769","wikidata":"https://www.wikidata.org/wiki/Q4968575","display_name":"Plateau (mathematics)","level":2,"score":0.3621000051498413},{"id":"https://openalex.org/C119947313","wikidata":"https://www.wikidata.org/wiki/Q5596635","display_name":"Jet (fluid)","level":2,"score":0.35929998755455017},{"id":"https://openalex.org/C118365302","wikidata":"https://www.wikidata.org/wiki/Q4817115","display_name":"Atmospheric model","level":2,"score":0.2992999851703644},{"id":"https://openalex.org/C2778835443","wikidata":"https://www.wikidata.org/wiki/Q39061","display_name":"Northern Hemisphere","level":2,"score":0.29580000042915344},{"id":"https://openalex.org/C111603439","wikidata":"https://www.wikidata.org/wiki/Q752193","display_name":"Boundary layer","level":2,"score":0.2953000068664551},{"id":"https://openalex.org/C162164538","wikidata":"https://www.wikidata.org/wiki/Q202325","display_name":"Jet stream","level":3,"score":0.2816999852657318},{"id":"https://openalex.org/C150284090","wikidata":"https://www.wikidata.org/wiki/Q2615451","display_name":"Atmospheric circulation","level":2,"score":0.2709999978542328},{"id":"https://openalex.org/C2779570065","wikidata":"https://www.wikidata.org/wiki/Q1754137","display_name":"Leading edge","level":2,"score":0.2630999982357025},{"id":"https://openalex.org/C169596890","wikidata":"https://www.wikidata.org/wiki/Q661247","display_name":"Breaking wave","level":3,"score":0.25870001316070557},{"id":"https://openalex.org/C88582754","wikidata":"https://www.wikidata.org/wiki/Q1583422","display_name":"Sudden stratospheric warming","level":4,"score":0.25769999623298645},{"id":"https://openalex.org/C199641428","wikidata":"https://www.wikidata.org/wiki/Q760765","display_name":"Potential temperature","level":2,"score":0.25270000100135803}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.5194/egusphere-2026-6696","doi":"https://doi.org/10.5194/egusphere-2026-6696","is_oa":true,"landing_page_url":"https://doi.org/10.5194/egusphere-2026-6696","pdf_url":null,"source":null,"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"acceptedVersion","is_accepted":true,"is_published":false,"raw_source_name":"EGUsphere","raw_type":"posted-content"}],"best_oa_location":{"id":"doi:10.5194/egusphere-2026-6696","doi":"https://doi.org/10.5194/egusphere-2026-6696","is_oa":true,"landing_page_url":"https://doi.org/10.5194/egusphere-2026-6696","pdf_url":null,"source":null,"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"acceptedVersion","is_accepted":true,"is_published":false,"raw_source_name":"EGUsphere","raw_type":"posted-content"},"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":0,"referenced_works":[],"related_works":[],"abstract_inverted_index":{"Abstract.":[0],"The":[1,64],"stratospheric":[2,282],"polar":[3],"vortex":[4],"(SPV)":[5],"is":[6,22,52],"a":[7,23,88,110,124,133,174],"dominant":[8],"feature":[9],"of":[10,26,37,61,132,176,251,288],"the":[11,35,38,58,84,92,96,106,139,148,153,160,165,256,286],"winter":[12],"stratosphere,":[13],"characterized":[14],"by":[15,30,100,138],"circumpolar":[16],"westerly":[17],"winds.":[18],"Its":[19],"lowermost":[20],"edge":[21,40,86,108,208],"key":[24],"region":[25,71,113],"troposphere\u2013stratosphere":[27],"coupling.":[28],"Shaped":[29],"Rossby":[31],"wave":[32,62],"breaking":[33],"(RWB),":[34],"morphology":[36,117],"lower-SPV":[39,107,257],"reflects":[41],"changes":[42],"in":[43,69,159,203,255,260],"jet-stream":[44],"orientation,":[45],"storm-track":[46],"activity,":[47],"and":[48,51,57,116,169,172,197,207,219,222,226,231,244,272,279,293],"atmospheric":[49],"blocking,":[50],"linked":[53],"to":[54],"surface":[55,217],"weather":[56],"upward":[59],"propagation":[60],"activity.":[63],"nonlinear":[65],"potential-vorticity":[66],"(PV)":[67],"dynamics":[68],"this":[70,289],"motivate":[72],"approaches":[73],"that":[74],"capture":[75],"its":[76,180],"evolving":[77],"structure.":[78],"However,":[79],"existing":[80],"classifications":[81],"typically":[82],"represent":[83],"SPV":[85,204,238,270],"as":[87,109,248],"pointwise":[89],"boundary,":[90],"overlooking":[91],"gradual":[93],"transition":[94],"between":[95,141],"stratosphere":[97,161],"troposphere":[98],"suggested":[99],"tracer":[101],"observations.":[102],"Here,":[103],"we":[104],"treat":[105],"finite-width":[111],"boundary":[112],"whose":[114],"width":[115],"define":[118],"distinct":[119,213],"circulation":[120],"regimes.":[121,188],"We":[122,145],"develop":[123],"daily,":[125],"year-round":[126],"classification":[127],"based":[128],"on":[129,147,152],"recurring":[130],"configurations":[131,192],"lower-stratospheric":[134,214],"PV":[135,143,167,215,253],"band,":[136],"defined":[137],"area":[140],"two":[142],"contours.":[144],"focus":[146],"6\u20137":[149],"PVU":[150],"band":[151],"350-K":[154],"isentropic":[155],"surface,":[156],"which":[157],"remains":[158],"year-round,":[162],"closely":[163],"follows":[164],"maximum":[166],"gradient":[168],"subpolar":[170],"jet,":[171],"provides":[173],"measure":[175],"jet":[177],"intensity":[178],"through":[179],"width.":[181],"A":[182],"self-organizing":[183],"map":[184],"(SOM)":[185],"identifies":[186],"12":[187],"These":[189],"regimes":[190],"span":[191],"associated":[193],"with":[194,240],"regional":[195],"blocking":[196,246],"hemispheric":[198],"annular":[199],"modes,":[200],"including":[201],"variations":[202],"core":[205],"strength":[206],"sharpness.":[209],"Each":[210],"regime":[211,265,276],"exhibit":[212],"anomalies,":[216],"temperature":[218],"pressure":[220],"patterns,":[221],"tropospheric":[223],"heat,":[224],"momentum,":[225],"transient-wave":[227],"activity":[228],"fluxes.":[229],"Transition":[230],"persistence":[232],"statistics":[233],"reveal":[234,268],"preferred":[235],"pathways":[236],"toward":[237],"weakening,":[239],"Scandinavian,":[241],"North":[242],"Pacific,":[243],"Greenland":[245],"emerging":[247],"prominent":[249],"precursors":[250],"negative":[252],"anomalies":[254],"core.":[258],"Changes":[259],"10-hPa":[261],"wind":[262],"speed":[263],"across":[264],"transitions":[266],"further":[267],"systematic":[269],"preconditioning":[271],"responses.":[273],"Finally,":[274],"anomalous":[275],"occupancies":[277],"before":[278],"after":[280],"sudden":[281],"warmings":[283],"(SSWs)":[284],"highlight":[285],"potential":[287],"framework":[290],"for":[291],"understanding":[292],"predicting":[294],"SSW":[295],"events.":[296]},"counts_by_year":[],"updated_date":"2026-11-05T12:25:35.769452","created_date":"2026-11-05T00:00:00"}