{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/121534"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/121534","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Use of airborne lidar for boundary layer entrainment zone observations","abstract":"Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-12-04 without embargo terms","abstract_html":"Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-12-04 without embargo terms","abstract_has_math":false,"creators":["Sagrestano, Sophia Mary"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Atmospheric Sciences","degree_department":null,"school":null,"contributors":["Kristovich, David","Dominguez, Francina","Lasher-Trapp, Sonia","Bhimireddy, Sudheer Reddy"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2023,"date_issued":"2023-08","date_published":"2023-08","updated_at":"2026-07-22T22:25:00Z","subjects":["Boundary Layer","Entrainment","Lake-effect","Lidar Meteorology","Remote Sensing"],"languages":["en","eng"],"rights":["Copyright 2023 Sophia Sagrestano"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/2142/121534","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Kristovich, David","Dominguez, Francina","Lasher-Trapp, Sonia","Bhimireddy, Sudheer Reddy"]},{"key":"dc:creator","label":"Author","values":["Sagrestano, Sophia Mary"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2023-08","2023-07-19"]},{"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":["Boundary Layer","Entrainment","Lake-effect","Lidar Meteorology","Remote Sensing"]}]},{"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 Sophia Sagrestano"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://hdl.handle.net/2142/121534"]}]},{"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 2023-12-04 without embargo terms","The student, Sophia Sagrestano, accepted the attached license on 2023-07-17 at 14:28.","The student, Sophia Sagrestano, submitted this Thesis for approval on 2023-07-17 at 14:43.","This Thesis was approved for publication on 2023-07-19 at 16:00.","DSpace SAF Submission Ingestion Package generated from Vireo submission #19715 on 2023-12-04 at 17:02:41","Entrainment processes in the cloud-topped convective boundary layer are known to lead to boundary layer heating, most often drying, and changing concentrations of constituent gases and particles. However, such entrainment processes are notoriously difficult to observe and to accurately simulate. During lake effect snow events, the clouds fill the upper layers of the convective boundary layer; therefore, it might be anticipated that entrainment processes could have large impacts on lake effect formation and snowfall production overall. Using data taken during the Ontario Winter Lake Effect Systems (OWLeS) project provided by the University of Wyoming Cloud LIDAR (WCL) on 17 intensive operations periods (IOPs), we have documented spatial variations in the top of the lake-effect clouds, indicative of the boundary layer top, over Lake Ontario and surrounding land areas. The WCL cannot penetrate thick lake effect clouds, resulting in a thin layer of high backscatter with markedly lower backscatter values below. The backscatter variability is used to determine how cloud tops vary spatially along the flight leg, which gives an idea of the depth of the entrainment zone. 264 one-minute observations of the boundary layer top observations were identified when the UWKA flew mostly horizontal above the lake-effect cloud top. For each, average boundary layer top height and its variability have been calculated, with the intent of relating these factors to environmental conditions within and above the entrainment zone. Results indicate that the boundary layer top behaves much like is expected for convective boundary layers (CBL). Surprisingly, the lake effect cloud tops only penetrate the base of the entrainment zone."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Use of airborne lidar for boundary layer entrainment zone observations"]}]}],"canonical_facts":{"dc:contributor":["Kristovich, David","Dominguez, Francina","Lasher-Trapp, Sonia","Bhimireddy, Sudheer Reddy"],"dc:creator":["Sagrestano, Sophia Mary"],"dc:date":["2023-08","2023-07-19"],"dc:description":["Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-12-04 without embargo terms","The student, Sophia Sagrestano, accepted the attached license on 2023-07-17 at 14:28.","The student, Sophia Sagrestano, submitted this Thesis for approval on 2023-07-17 at 14:43.","This Thesis was approved for publication on 2023-07-19 at 16:00.","DSpace SAF Submission Ingestion Package generated from Vireo submission #19715 on 2023-12-04 at 17:02:41","Entrainment processes in the cloud-topped convective boundary layer are known to lead to boundary layer heating, most often drying, and changing concentrations of constituent gases and particles. However, such entrainment processes are notoriously difficult to observe and to accurately simulate. During lake effect snow events, the clouds fill the upper layers of the convective boundary layer; therefore, it might be anticipated that entrainment processes could have large impacts on lake effect formation and snowfall production overall. Using data taken during the Ontario Winter Lake Effect Systems (OWLeS) project provided by the University of Wyoming Cloud LIDAR (WCL) on 17 intensive operations periods (IOPs), we have documented spatial variations in the top of the lake-effect clouds, indicative of the boundary layer top, over Lake Ontario and surrounding land areas. The WCL cannot penetrate thick lake effect clouds, resulting in a thin layer of high backscatter with markedly lower backscatter values below. The backscatter variability is used to determine how cloud tops vary spatially along the flight leg, which gives an idea of the depth of the entrainment zone. 264 one-minute observations of the boundary layer top observations were identified when the UWKA flew mostly horizontal above the lake-effect cloud top. For each, average boundary layer top height and its variability have been calculated, with the intent of relating these factors to environmental conditions within and above the entrainment zone. Results indicate that the boundary layer top behaves much like is expected for convective boundary layers (CBL). Surprisingly, the lake effect cloud tops only penetrate the base of the entrainment zone."],"dc:format":["application/pdf"],"dc:identifier":["https://hdl.handle.net/2142/121534"],"dc:language":["en","eng"],"dc:rights":["Copyright 2023 Sophia Sagrestano"],"dc:subject":["Boundary Layer","Entrainment","Lake-effect","Lidar Meteorology","Remote Sensing"],"dc:title":["Use of airborne lidar for boundary layer entrainment zone observations"],"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":"2026-07-22T22:25:00Z"}