Atmosferska termička cirkulacija na obali Kozjaka

master's thesis

• Title (english): Atmospheric thermal circulation on the shores of Lake Kozjak
• Author: Darko Staver
• Mentor: Zvjezdana Bencetić-Klaić (mentor)
• Committee member: Zvjezdana Bencetić-Klaić (predsjednik povjerenstva)
• Committee member: Maja Telišman-Prtenjak (član povjerenstva)
• Committee member: Josip Stipčević (član povjerenstva)
• Committee member: Branko Grisogono (član povjerenstva)
• Committee member: Iva Dasović (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Geophysics); Zagreb
• Defense date and country: 2021-09-30, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Geophysics; Meteorology and Climatology

Abstract

U ovom radu je proučavana atmosferska termička cirkulacija zbog utjecaja jezera Kozjak u Plitvičkim jezerima. Napravljen je filtar pomoću kojega su detektirani dani s obalnom cirkulacijom. Proučavano razdoblje je 2018-2020, gdje je analizirano 85 dana tijekom ljeta za svaku godinu. Pokazalo se da je učestalost obalne cirkulacije oko jezera Kozjak izmedu 15% i 36%. Najmanje dana u kojima je postignuta cirkulacija bilo je 2019. godine, a najviše je bilo 2018. godine. Dobiveni rezultati su u skladu s onima koje su dobili drugi autori. Napravljen je jednostavan statistički model pomoću kojega se procijenilo koliko bi dana filtri trebali eliminirati iz skupa početnih podataka. Sveukupan broj dana koje filtri eliminiraju u skladu je sa statistički dobivenim, ako se promatra cijelo razdoblje od 255 dana. Uočila se korelacija izmedu ukupnog broja dana s obalnom cirkulacijom i pojedinačnih uvjeta filtra. Ti uvjeti su vezani uz vjetar tijekom dana, vjetar tijekom noći i dnevnu amplitudu tlaka.
Proučavan je i srednji dnevni hod vjetra u danima s razvijenom obalnom cirkulacijom. Dobivene krivulje za srednji dnevni hod se razlikuju ovisno o godini, ali sve prate istu putanju, bez ikakvih odstupanja. Za provjeru dobivenih rezultata koristila se Morlet valićna metoda. Svi rezultati su u skladu s onima dobivenim Morlet valićnom metodom.

Abstract (english)

Lake-land breeze circulation in the vicinity of lake Kozjak in Plitvička jezera was studied. A filter was created to detect all days when lake-land breeze was present. The period of the study was 2018-2020, 85 summer days of each year. It is shown that the frequency of lake-land breezes around lake Kozjak was from 15% to 36%. The year with the smallest number of lake-land breeze days was 2019, and the year with the highest number of days was 2018. Results are similar to those obtained by other authors. A simple statistical model was designed to estimate the number of days that the filter should eliminate from initial data set. The number of days eliminated by filter is similar to the number of these predicted by statistical methods if we observe all 255 days. Clear correlation was noticed between the number of days with lakeland breeze and individual filter conditions. These conditions were tied with wind during the day, wind during the night and diurnal pressure amplitude. Diurnal cycles of surface winds in the days where lake-land breeze was present, were examined. It was shown that there is a clear daily pattern which the wind follows. The Morlet wavelet method was used to check the obtained results, all results are in accordance with the obtained graphs of the Morlet wavelet method.

• Keywords: Plitvička jezera; diferencijalno zagrijavanje; obalna cirkulacija; medudijelovanje atmosfere i jezera
• Keywords (english): Plitvice lakes; air-lake interactions; diferential heating; lake breeze
• Language: croatian
• URN:NBN: urn:nbn:hr:217:998399
• Study programme: Title: Graduate university study pf Physics - Geophysics; specializations in: Seismology and Physics of the Earth's Interior, Meteorology and Physical Oceanography; Course: Meteorology and Physical Oceanography; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra fizike – geofizike (magistar/magistra fizike – geofizike)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2021-10-07 13:06:36