{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/120446"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/120446","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Understanding the impact of the lowermost stratospheric thermodynamic environment on observed overshooting top characteristics","abstract":"Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-05-01","abstract_html":"Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-05-01","abstract_has_math":false,"creators":["Berman, Melinda T"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Atmospheric Sciences","degree_department":null,"school":null,"contributors":["Trapp, Robert J","Nesbitt, Stephen W"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2023,"date_issued":"2023-05","date_published":"2023-05","updated_at":"2026-07-22T22:24:57Z","subjects":["Stratosphere","Thermodynamics","Overshooting Top"],"languages":["en","eng"],"rights":["Copyright 2023 Melinda Berman"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/2142/120446","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Trapp, Robert J","Nesbitt, Stephen W"]},{"key":"dc:creator","label":"Author","values":["Berman, Melinda T"]}]},{"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":["Stratosphere","Thermodynamics","Overshooting Top"]}]},{"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 Melinda Berman"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://hdl.handle.net/2142/120446"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-05-01","The student, Melinda Berman, accepted the attached license on 2023-05-01 at 10:38.","The student, Melinda Berman, submitted this Thesis for approval on 2023-05-01 at 13:02.","This Thesis was approved for publication on 2023-05-02 at 16:15.","DSpace SAF Submission Ingestion Package generated from Vireo submission #19275 on 2023-09-01 at 17:15:41","Overshooting tops (OTs) are manifestations of deep convective updrafts that extend above the tropopause into the stratosphere. They can induce dynamic perturbations and result in irreversible transport of aerosols, smoke, water vapor and other mass from the troposphere into the stratosphere, thereby impacting the chemical composition of the stratosphere. These and other effects of OTs depend on their characteristics such as depth and area, both of which are understood to relate to midlevel updraft structure. Less understood is how static stability in the lowermost stratosphere (LMS) potentially modifies these OT characteristics, thus motivating the current study. The LMS static stability and observed OT characteristics are quantified and compared using a combination of reanalysis data, observed rawinsonde data and geostationary satellite data. A modest relationship between OT depth and LMS lapse rate (R = 0.48) and Brunt-Väisälä frequency (R = -0.43) is found, implying that OT depth is reduced with an increasingly stable LMS. In contrast, no relationship (R ~ 0) is found between OT area and LMS static stability, implying that OT area is controlled primarily by midlevel updraft area. These relationships may be useful in describing mid- and low-level storm dynamics from satellite-observed characteristics of OTs in near real-time. Idealized model simulations using the Bryan Cloud Model 1 (CM1) are used to help interpret these relationships. Modeling results for OT depth are consistent with observed behavior, while near storm top area modeling results are somewhat consistent with observed OT area trends."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Understanding the impact of the lowermost stratospheric thermodynamic environment on observed overshooting top characteristics"]}]}],"canonical_facts":{"dc:contributor":["Trapp, Robert J","Nesbitt, Stephen W"],"dc:creator":["Berman, Melinda T"],"dc:date":["2023-05","2023-05-02"],"dc:description":["Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-05-01","The student, Melinda Berman, accepted the attached license on 2023-05-01 at 10:38.","The student, Melinda Berman, submitted this Thesis for approval on 2023-05-01 at 13:02.","This Thesis was approved for publication on 2023-05-02 at 16:15.","DSpace SAF Submission Ingestion Package generated from Vireo submission #19275 on 2023-09-01 at 17:15:41","Overshooting tops (OTs) are manifestations of deep convective updrafts that extend above the tropopause into the stratosphere. They can induce dynamic perturbations and result in irreversible transport of aerosols, smoke, water vapor and other mass from the troposphere into the stratosphere, thereby impacting the chemical composition of the stratosphere. These and other effects of OTs depend on their characteristics such as depth and area, both of which are understood to relate to midlevel updraft structure. Less understood is how static stability in the lowermost stratosphere (LMS) potentially modifies these OT characteristics, thus motivating the current study. The LMS static stability and observed OT characteristics are quantified and compared using a combination of reanalysis data, observed rawinsonde data and geostationary satellite data. A modest relationship between OT depth and LMS lapse rate (R = 0.48) and Brunt-Väisälä frequency (R = -0.43) is found, implying that OT depth is reduced with an increasingly stable LMS. In contrast, no relationship (R ~ 0) is found between OT area and LMS static stability, implying that OT area is controlled primarily by midlevel updraft area. These relationships may be useful in describing mid- and low-level storm dynamics from satellite-observed characteristics of OTs in near real-time. Idealized model simulations using the Bryan Cloud Model 1 (CM1) are used to help interpret these relationships. Modeling results for OT depth are consistent with observed behavior, while near storm top area modeling results are somewhat consistent with observed OT area trends."],"dc:format":["application/pdf"],"dc:identifier":["https://hdl.handle.net/2142/120446"],"dc:language":["en","eng"],"dc:rights":["Copyright 2023 Melinda Berman"],"dc:subject":["Stratosphere","Thermodynamics","Overshooting Top"],"dc:title":["Understanding the impact of the lowermost stratospheric thermodynamic environment on observed overshooting top characteristics"],"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":"2026-07-22T22:24:57Z"}