Title
Dynamic characteristics of the koshava wind
Creator
Romanić, Đorđe. 1984-
Copyright date
2016
Object Links
Select license
Autorstvo-Nekomercijalno-Bez prerade 3.0 Srbija (CC BY-NC-ND 3.0)
License description
Dozvoljavate samo preuzimanje i distribuciju dela, ako/dok se pravilno naznačava ime autora, bez ikakvih promena dela i bez prava komercijalnog korišćenja dela. Ova licenca je najstroža CC licenca. Osnovni opis Licence: http://creativecommons.org/licenses/by-nc-nd/3.0/rs/deed.sr_LATN. Sadržaj ugovora u celini: http://creativecommons.org/licenses/by-nc-nd/3.0/rs/legalcode.sr-Latn
Language
English
Cobiss-ID
Committee report
Theses Type
Doktorska disertacija
description
Datum odbrane: 10.05.2016.
Other responsibilities
mentor
Ćurić, Mlađen, 1947-
član komisije
Janc, Dejan, 1956-
član komisije
Ruml, Mirjana, 1963-
Academic Expertise
Prirodno-matematičke nauke
Academic Title
-
University
Univerzitet u Beogradu
Faculty
Fizički fakultet
Alternative title
Dinamičke karakteristike košave
Publisher
[Đ. Romanić]
Format
XXII, 189 listova
description
Earth science - Meteorology / Геофизичка наука - Метеорологија
Abstract (en)
Koshava is a local wind usually observed in the cold part of the year over the large part of Serbia, parts of Romania, parts of Hungary, and east Croatia. Koshava blows from southeast quadrant. The Eurasian high and Mediterranean cyclones, together with the orography of the eastern Balkan, are the main drivers of the Koshava wind. In this study, a comprehensive analysis of long-term trends of the Koshava wind in the period between 1949 and 2010 is carried out. The trend analyses are performed on wind data sets from five synoptic weather stations, all situated in the region where the Koshava wind is fully developed. In order to obtain more accurate trends, Koshava speeds are divided into two categories: (1) all wind speeds and, (2) wind speeds above 5 m s-1. Two homogeneity tests are used to inspect the quality of wind speed and wind direction time series. The Mann-Kendall test and the Sen’s slope estimator are used to analyze trends of the Koshava speeds and the annual number of days with the Koshava wind. Statistically significant negative trends of the Koshava speeds and wind activity are observed at almost all weather stations and are generally more pronounced for wind speeds above 5 m s-1. The negative trends of the Koshava wind are mostly related to the changes in the synoptic circulation, temperature and weakening of the Eurasian high and West-Mediterranean cyclones. It is shown that observed declining of the Koshava wind does not have a significant impact on reducing the wind energy potential in the region...
Abstract (sr)
Кошава је локални ветар који се најчешће јавља у хладној половини године изнад већих делова Србије, делова Румуније, делова Мађарске и изнад источне Хрватске. Кошава дува из југоисточног квадранта. Евроазијски антициклон и медитерански циклони у комбинацији са орографијом источног Балкана су главни узрочници Кошаве. Ова студија представља детаљну анализу дугорочних трендова Кошаве за педиод од 1949. до 2010. године. Анализе трендова су урађене користећи податке са пет синоптичких метеоролошких станица које се налазе у кошавском региону. У циљу добијања што прецизнијих трендова, брзине Кошаве су подељене у две категорије: (1) све брзине и (2) брзине изнад 5 m s-1. Два теста за анализу хомогености података коришћена су за испитивање квалитета података о брзини и смеру ветра. Ман-Кендал (Mann-Kendall) тест о постојању тренда и Сенов метод за оцену нагиба тренда коришћени су за анализе трендова брзине Кошаве и годишњег броја дана са Кошавом. Статистички значајни негативни трендови брзине Кошаве и њене активности забележени су на свим анализираним станицама и генерално су израженији за брзине ветра изнад 5 m s-1. Израчунати негативни трендови Кошаве условљени су променама у синоптичкој циркулацији, трендовима температуре у региону и слабљењем Евроазијског антициклона и западномедитеранских циклона. Показано је да слабљење Кошаве нема значајног економског утицаја на ветроенергетски потенцијал у региону...
Authors Key words
Koshava wind, local winds, Mediterranean cyclones, Eurasian anticyclones, gap flow, Synoptic Koshava Index, trend analysis, homogeneity testing, WRF, snowdrifts.
Authors Key words
Кошава ветар, локални ветар, медитерански циклони, евроазијски антициклони, каналисани ток, Синоптички Кошава инделс, тренд анализа, тест хомогености, WRF, снежни наноси.
Classification
551.5 (043)
Type
Tekst
Abstract (en)
Koshava is a local wind usually observed in the cold part of the year over the large part of Serbia, parts of Romania, parts of Hungary, and east Croatia. Koshava blows from southeast quadrant. The Eurasian high and Mediterranean cyclones, together with the orography of the eastern Balkan, are the main drivers of the Koshava wind. In this study, a comprehensive analysis of long-term trends of the Koshava wind in the period between 1949 and 2010 is carried out. The trend analyses are performed on wind data sets from five synoptic weather stations, all situated in the region where the Koshava wind is fully developed. In order to obtain more accurate trends, Koshava speeds are divided into two categories: (1) all wind speeds and, (2) wind speeds above 5 m s-1. Two homogeneity tests are used to inspect the quality of wind speed and wind direction time series. The Mann-Kendall test and the Sen’s slope estimator are used to analyze trends of the Koshava speeds and the annual number of days with the Koshava wind. Statistically significant negative trends of the Koshava speeds and wind activity are observed at almost all weather stations and are generally more pronounced for wind speeds above 5 m s-1. The negative trends of the Koshava wind are mostly related to the changes in the synoptic circulation, temperature and weakening of the Eurasian high and West-Mediterranean cyclones. It is shown that observed declining of the Koshava wind does not have a significant impact on reducing the wind energy potential in the region...
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