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master's thesis
Metoda razlikovanja magle i niske stratusne naoblake pomoću satelitskih podataka i prizemne temperature
Zagreb: University of Zagreb, Faculty of Science, 2018. urn:nbn:hr:217:636154
Cerovečki, Marija
University of Zagreb
Faculty of Science
Department of Geophysics

Institutional repository: Repository of the Faculty of Science

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Cerovečki, M. (2018). Metoda razlikovanja magle i niske stratusne naoblake pomoću satelitskih podataka i prizemne temperature (Master's thesis). Zagreb: University of Zagreb, Faculty of Science. Retrieved from https://urn.nsk.hr/urn:nbn:hr:217:636154

Cerovečki, Marija. "Metoda razlikovanja magle i niske stratusne naoblake pomoću satelitskih podataka i prizemne temperature." Master's thesis, University of Zagreb, Faculty of Science, 2018. https://urn.nsk.hr/urn:nbn:hr:217:636154

Cerovečki, Marija. "Metoda razlikovanja magle i niske stratusne naoblake pomoću satelitskih podataka i prizemne temperature." Master's thesis, University of Zagreb, Faculty of Science, 2018. https://urn.nsk.hr/urn:nbn:hr:217:636154

Cerovečki, M. (2018). 'Metoda razlikovanja magle i niske stratusne naoblake pomoću satelitskih podataka i prizemne temperature', Master's thesis, University of Zagreb, Faculty of Science, accessed 25 December 2024, https://urn.nsk.hr/urn:nbn:hr:217:636154

Cerovečki M. Metoda razlikovanja magle i niske stratusne naoblake pomoću satelitskih podataka i prizemne temperature [Master's thesis]. Zagreb: University of Zagreb, Faculty of Science; 2018 [cited 2024 December 25] Available at: https://urn.nsk.hr/urn:nbn:hr:217:636154

M. Cerovečki, "Metoda razlikovanja magle i niske stratusne naoblake pomoću satelitskih podataka i prizemne temperature", Master's thesis, University of Zagreb, Faculty of Science, Zagreb, 2018. Available at: https://urn.nsk.hr/urn:nbn:hr:217:636154

Metadata
TitleMetoda razlikovanja magle i niske stratusne naoblake pomoću satelitskih podataka i prizemne temperature
Title (english)Discrimination between fog and stratus clouds using a method based on satellite data and ground measurements
AuthorMarija Cerovečki
MentorNataša Strelec Mahović (mentor)
Committee memberNataša Strelec Mahović (predsjednik povjerenstva)
Committee memberMaja Telišman Prtenjak (član povjerenstva)
Committee memberSnježana Markušić (član povjerenstva)
Committee memberŽeljko Večenaj (član povjerenstva)
Committee memberInes Ivančić (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Science
(Department of Geophysics)
Zagreb
Defense date and country2018-09-26, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Geophysics
Meteorology and Climatology
Abstract
Nastanak i disipacija, prostorna raspoređenost i dinamika magle vrlo su važne informacije za odvijanje i sigurnost pomorskog,cestovnog i zračnog prometa. Prognoza magle pomoću numeričkih modela za prognozu vremena još je uvijek vrlo zahtjevno područje operativne meteorologije. S druge strane, većina državnih meteoroloških službi automatizira sinoptičke postaje, pa su motrenja koja obavljaju motritelji na postajama, kao što su naoblaka, vidljivost i meteorološke pojave, sve manje dostupna, jer automatske postaje nisu uvijek opremljene instrumentima za mjerenje vidljivosti. Stoga, objektivne metode za razlikovanje magle i stratusne naoblake, temeljene na podatcima daljinskih motrenja, mogu pružiti dodatne informacije potrebne za detekciju i vrlo kratkoročnu prognozu (nowcast) magle. U ovom radu je testirana pretpostavka da je razlika prizemne temperature na 2m visine mjerene na sinoptičkim postajama i temperature vrha stratusnog sloja ili sloja magle, dobivene iz satelitskih podataka, znatno manja u slučajevima s maglom nego u slučajevima sa sumaglicom i stratusnom naoblakom. Dani s maglom, sumaglicom i stratusnom naoblakom izdvojeni su iz sinoptičkih izvještaja i NWCSAF (Nowcasting Satellite Application Facility) CTYPE (Cloud Type) produkta. Za određivanje temperature vrha sloja magle/stratusa korišteni su satelitski podatci s MSG (Meteosat Second Generation) satelita, iz infracrvenih kanala IR8.7, IR10.8 i IR12.0, a podatci o temperaturi zraka na 2m iz sinoptičkih izvještaja prikupljenih s četiri kontinentalne i pet primorskih postaja Hrvatske. Dobiveni rezultati pokazuju da su temperaturne razlike vrha sloja i prizemne temperature znatno manje (∼ 3◦C) u slučajevima magle nego u slučajevima sumaglice i stratusne naoblake.
Abstract (english)
Formation and dissipation, spatial extent and dynamics of fog are very important information for sea, road and air traffic management, especially in terms of traffic safety. Nowcasting and forecasting of fog, using numerical model products, still represent very demanding tasks in the operational meteorology. Since most of national weather services tend to automatize their synoptic weather stations, human observations about current weather, i.e. visibility, fog and low clouds, will become less available. Consequently, an objective method for discrimination between fog and stratus clouds is becoming increasingly important for real time detection, as well as nowcasting of fog. The hypothesis which was tested in this study is that the temperature differences between 2m temperature measured on synoptic weather stations and brightness temperature of the top of fog/low cloud layer is notably different in cases with fog compared to cases with haze or stratus. Days with fog or low clouds were identified using weather observation reports and NWCSAF (Nowcasting Satellite Application Facility) CTYPE (Cloud Type) product. The analysis was done using Meteosat Second Generation satellite data, i.e. infrared channels (IR8.7, IR10.8 and IR12.0) to obtain brigntness temperature, and 2m temperature measurements from four synoptic weather stations in the continental part of Croatia and five weather stations along the coastline. The results showed that differences between 2m temperature and cloud top temperature are significantly lower (∼ 3◦C) in cases with fog, than in those with haze or stratus.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:217:636154
Study programmeTitle: 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 resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2018-10-09 13:46:20