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PollyXT Raman Lidar and Halo Wind Doppler Lidar profiles were used to study the daily vertical evolution of the PBL. Wavelet Covariance Transform (WCT) and Threshold Method (TM) were performed on different products acquired from Lidars. According to the analysis, all methods and products are able to provide reasonable boundary-layer height estimates, each of them showing assets and barriers under certain conditions. Two cases are presented in detail, indicating the limited daytime evolution of a coastal area, the decisive role of wind speed-direction in the formation of a shallow or high boundary layer and the differences when using aerosols or turbulence as tracers for the PBL height retrieval. Comparison between the observed PBL and ECMWF model results was made, establishing the importance of actual PBL measurements, in coastal regions with complex topography.<\/jats:p>","DOI":"10.3390\/rs14164057","type":"journal-article","created":{"date-parts":[[2022,8,22]],"date-time":"2022-08-22T01:56:40Z","timestamp":1661133400000},"page":"4057","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["PBL Height Retrievals at a Coastal Site Using Multi-Instrument Profiling Methods"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7858-1667","authenticated-orcid":false,"given":"Ioanna","family":"Tsikoudi","sequence":"first","affiliation":[{"name":"Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing, National Observatory of Athens (IAASARS-NOA), GR-15236 Penteli, Greece"},{"name":"Department of Physics, Section of Environmental Physics-Meteorology, National and Kapodistrian University of Athens, GR-15784 Zografou, Greece"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2631-6057","authenticated-orcid":false,"given":"Eleni","family":"Marinou","sequence":"additional","affiliation":[{"name":"Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing, National Observatory of Athens (IAASARS-NOA), GR-15236 Penteli, Greece"},{"name":"Laboratory of Atmospheric Physics, Aristotle University of Thessaloniki (AUTH), GR-54124 Thessaloniki, Greece"},{"name":"Institute of Atmospheric Physics, German Aerospace Center (DLR), DE-82234 Oberpfaffenhofen, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ville","family":"Vakkari","sequence":"additional","affiliation":[{"name":"Finnish Meteorological Institute (FMI), FI-00560 Helsinki, Finland"},{"name":"Atmospheric Chemistry Research Group, Chemical Resource Beneficiation, North-West University, Potchefstroom ZA-2531, South Africa"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9270-8361","authenticated-orcid":false,"given":"Anna","family":"Gialitaki","sequence":"additional","affiliation":[{"name":"Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing, National Observatory of Athens (IAASARS-NOA), GR-15236 Penteli, Greece"},{"name":"Laboratory of Atmospheric Physics, Aristotle University of Thessaloniki (AUTH), GR-54124 Thessaloniki, Greece"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Maria","family":"Tsichla","sequence":"additional","affiliation":[{"name":"Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing, National Observatory of Athens (IAASARS-NOA), GR-15236 Penteli, Greece"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Vassilis","family":"Amiridis","sequence":"additional","affiliation":[{"name":"Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing, National Observatory of Athens (IAASARS-NOA), GR-15236 Penteli, Greece"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mika","family":"Komppula","sequence":"additional","affiliation":[{"name":"Finnish Meteorological Institute (FMI), FI-70211 Kuopio, Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4221-992X","authenticated-orcid":false,"given":"Ioannis Panagiotis","family":"Raptis","sequence":"additional","affiliation":[{"name":"Institute for Environmental Research and Sustainable Development, National Observatory of Athens, GR-15236 Penteli, Greece"},{"name":"Faculty of Geology and Geoenvironment, National and Kapodistrian University of Athens (NKUA), GR-15236 Athens, Greece"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8453-7942","authenticated-orcid":false,"given":"Anna","family":"Kampouri","sequence":"additional","affiliation":[{"name":"Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing, National Observatory of Athens (IAASARS-NOA), GR-15236 Penteli, Greece"},{"name":"Department of Meteorology and Climatology, School of Geology, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6774-5240","authenticated-orcid":false,"given":"Vasiliki","family":"Daskalopoulou","sequence":"additional","affiliation":[{"name":"Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing, National Observatory of Athens (IAASARS-NOA), GR-15236 Penteli, Greece"},{"name":"Section of Astrophysics and Space Physics, Department of Physics, University of Crete, GR-70013 Heraklion, Greece"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1282-0896","authenticated-orcid":false,"given":"Nikos","family":"Mihalopoulos","sequence":"additional","affiliation":[{"name":"Institute for Environmental Research and Sustainable Development, National Observatory of Athens, GR-15236 Penteli, Greece"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Eleni","family":"Giannakaki","sequence":"additional","affiliation":[{"name":"Department of Physics, Section of Environmental Physics-Meteorology, National and Kapodistrian University of Athens, GR-15784 Zografou, Greece"},{"name":"Finnish Meteorological Institute (FMI), FI-70211 Kuopio, Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Maria","family":"Tombrou","sequence":"additional","affiliation":[{"name":"Department of Physics, Section of Environmental Physics-Meteorology, National and Kapodistrian University of Athens, GR-15784 Zografou, 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