{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/120138"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/120138","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Seasonality, latitudinal dependence and structural evolution of arctic cyclones","abstract":"Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-09-01 without embargo terms","abstract_html":"Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-09-01 without embargo terms","abstract_has_math":false,"creators":["Yang, Mingshi"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Atmospheric Sciences","degree_department":null,"school":null,"contributors":["Wang, Zhuo","Rauber, Robert M","Walsh, John E"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2023,"date_issued":"2023-05","date_published":"2023-05","updated_at":"2026-07-22T22:24:56Z","subjects":["Arctic Cyclones","Cyclone Structure"],"languages":["en","eng"],"rights":["Copyright 2023 Mingshi Yang"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/2142/120138","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Wang, Zhuo","Rauber, Robert M","Walsh, John E"]},{"key":"dc:creator","label":"Author","values":["Yang, Mingshi"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2023-05","2023-05-02"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Atmospheric Sciences"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Arctic Cyclones","Cyclone Structure"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en","eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2023 Mingshi Yang"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://hdl.handle.net/2142/120138"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-09-01 without embargo terms","The student, Mingshi Yang, accepted the attached license on 2023-04-28 at 13:29.","The student, Mingshi Yang, submitted this Thesis for approval on 2023-04-28 at 14:28.","This Thesis was approved for publication on 2023-05-02 at 14:37.","DSpace SAF Submission Ingestion Package generated from Vireo submission #19243 on 2023-09-01 at 16:55:54","Arctic cyclones (ACs) are an important component of the Arctic climate system. Using the ERA5 Reanalysis and an AC track dataset with more than 18,000 tracks, we examined seasonality and latitudinal dependence and the structural evolution of ACs. The structures of ACs of different genesis regions, polar vs. midlatitude, are examined as well. Our findings show that ACs typically have an asymmetric horizontal structure with a tropospheric cold core and a lower stratospheric warm core. Cyclone asymmetry decreases, and the circulation becomes more barotropic in higher latitudes, and ACs of polar origin are more symmetric than ACs of midlatitude origin. Regarding seasonality, winter ACs are more intense, have a stronger horizontal asymmetry and a cyclonic circulation extending deeper into the stratosphere. In contrast, summer ACs have stronger warm anomalies in the lower stratosphere associated with subsidence, and the cyclonic circulation does not extend beyond 50 hPa. The latitudinal and seasonal variations of AC structure are consistent with the latitudinal and seasonal changes in environmental baroclinicity. Additionally, our analysis shows that the structural evolution of ACs is characterized by reduced vertical tilt and asymmetry, weakened temperature contrast between west and east sectors in troposphere, and reduced updraft strength."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Seasonality, latitudinal dependence and structural evolution of arctic cyclones"]}]}],"canonical_facts":{"dc:contributor":["Wang, Zhuo","Rauber, Robert M","Walsh, John E"],"dc:creator":["Yang, Mingshi"],"dc:date":["2023-05","2023-05-02"],"dc:description":["Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-09-01 without embargo terms","The student, Mingshi Yang, accepted the attached license on 2023-04-28 at 13:29.","The student, Mingshi Yang, submitted this Thesis for approval on 2023-04-28 at 14:28.","This Thesis was approved for publication on 2023-05-02 at 14:37.","DSpace SAF Submission Ingestion Package generated from Vireo submission #19243 on 2023-09-01 at 16:55:54","Arctic cyclones (ACs) are an important component of the Arctic climate system. Using the ERA5 Reanalysis and an AC track dataset with more than 18,000 tracks, we examined seasonality and latitudinal dependence and the structural evolution of ACs. The structures of ACs of different genesis regions, polar vs. midlatitude, are examined as well. Our findings show that ACs typically have an asymmetric horizontal structure with a tropospheric cold core and a lower stratospheric warm core. Cyclone asymmetry decreases, and the circulation becomes more barotropic in higher latitudes, and ACs of polar origin are more symmetric than ACs of midlatitude origin. Regarding seasonality, winter ACs are more intense, have a stronger horizontal asymmetry and a cyclonic circulation extending deeper into the stratosphere. In contrast, summer ACs have stronger warm anomalies in the lower stratosphere associated with subsidence, and the cyclonic circulation does not extend beyond 50 hPa. The latitudinal and seasonal variations of AC structure are consistent with the latitudinal and seasonal changes in environmental baroclinicity. Additionally, our analysis shows that the structural evolution of ACs is characterized by reduced vertical tilt and asymmetry, weakened temperature contrast between west and east sectors in troposphere, and reduced updraft strength."],"dc:format":["application/pdf"],"dc:identifier":["https://hdl.handle.net/2142/120138"],"dc:language":["en","eng"],"dc:rights":["Copyright 2023 Mingshi Yang"],"dc:subject":["Arctic Cyclones","Cyclone Structure"],"dc:title":["Seasonality, latitudinal dependence and structural evolution of arctic cyclones"],"dc:type":["text"],"thesis:degree_discipline":["Atmospheric Sciences"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:24:56Z"}