Eesti tuule kiiruste perioodilisuse analüüs
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Kuupäev
2016
Kättesaadav alates
Autorid
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
Töö põhiülesanne on analüüsida Eesti tuule kiiruste perioodilist käitumist.
Vaatlusandmetena on kasutatud EMHI vaatlusjaamade võrgu 2006...2015. aastate tuule
kiirusi. Vaatlusjaamadeks on valitud rannikualal Pakri ja Virstu, Peipsi ääres asuv
Tiirikoja ning sisemaal Kuusiku ja Jõgeva. Töös uuritakse, kuidas tuule kiirus varieerub
vastavalt asukohale aastate, aastaaegade, kuude ja ööpäeva lõikes. Samuti vaadeldakse,
kuidas korreleeruvad sarnaste asukohtade kiirused ning kas on võimalik ühe
vaatluskoha kiiruste järgi modelleerida teise punkti kiiruseid. Analüüsi käigus selgus, et
sisemaa vaatlusjaamade tulemused olid kõige sarnasemad. Esines ka teatud erinevusi,
kuid lahkuminekud jaamade vahel võivad olla põhjendatavad vaatluskoha omadustega.
Rannikualade vaatlusjaamade analüüsist selgus, et Virtsu ja Pakri vahel on üsna suured
erinevused. Analüüsides kümne aasta keskmiste tuule kiiruste andmeid, jõuti
järeldusele, et kiirus muutus kogu perioodi keskmisest 6...13% ning maksimaalsed
muutused aastate vahel olid 14...23%. Aastaaegade lõikes oli maksimaalne muutus
kiirustes 17...21%. Muutus kuude lõikes oli 30...40%. Ööpäeva lõikes oli kõige
ühtlasem tuule kiirus Pakris ja Virtsus, mis muutus vastavalt 9% ja 14%. Sisemaal oli
ööpäevane kiiruste muutus suurem, jäädes 30% lähedale. Aastastes ja ööpäevastes
kiirustes oli tugevaim korrelatsioon Kuusiku ja Jõgeva vahel, aastaaegade lõikes Virtsu
ja Tiirikoja kiirustes.
The main task of this research is to analyse data of periodical fluctuations of Estonian wind speeds and changes of behaviour in the different periods of time. The data of this research was sourced from Estonian Meteorological and Hydrological Institute and has been taken from observation stations network during 2006...2015 and is determined by the average speed for each data hour. For observation stations in the coastal area have been selected Pakri and Virtsu, at the coast of Peipsi lake located Tiirikoja and inland stations Kuusiku and Jõgeva. This research studies how wind speeds vary in different locations according years, seasons, months, and days. It also examines how the data is correlated at similar locations. The analysis revealed that the inland observation stations had the closest results. There were also some differences, but the discrepancies between the stations can be derived from characteristics of observation locations. Coastal observation stations analysis revealed that between Virtsu and Pakri are quite big differences. In conclusion to analysis of ten years average wind speed data was noticed that fluctuations of average wind speed in the whole period were 6...13% and maximum changes between years were 14..23%. The maximum fluctuations in wind speed between seasons were 17...21%. The highest wind speeds were measured in the autumn, winter and spring, and the calmest were summer months. The strongest winds were present in December and the calmest in August. The fluctuations throughout the year was up to 30...40%. The biggest deviations of the average of wind speed during the decade was recorder in Tiirikoja where wind speeds varied the most. The most homogenous wind speed during the 24 hour period was registered in Pakri and Virtsu where it changed accordingly 9% and 14%. The highest 24 hour change was registered in inland stations, ranging close to 30%. After analysing data from all stations it was concluded that positive correlation appeared which indicates that the wind speeds ranged during studied periods similarly.
The main task of this research is to analyse data of periodical fluctuations of Estonian wind speeds and changes of behaviour in the different periods of time. The data of this research was sourced from Estonian Meteorological and Hydrological Institute and has been taken from observation stations network during 2006...2015 and is determined by the average speed for each data hour. For observation stations in the coastal area have been selected Pakri and Virtsu, at the coast of Peipsi lake located Tiirikoja and inland stations Kuusiku and Jõgeva. This research studies how wind speeds vary in different locations according years, seasons, months, and days. It also examines how the data is correlated at similar locations. The analysis revealed that the inland observation stations had the closest results. There were also some differences, but the discrepancies between the stations can be derived from characteristics of observation locations. Coastal observation stations analysis revealed that between Virtsu and Pakri are quite big differences. In conclusion to analysis of ten years average wind speed data was noticed that fluctuations of average wind speed in the whole period were 6...13% and maximum changes between years were 14..23%. The maximum fluctuations in wind speed between seasons were 17...21%. The highest wind speeds were measured in the autumn, winter and spring, and the calmest were summer months. The strongest winds were present in December and the calmest in August. The fluctuations throughout the year was up to 30...40%. The biggest deviations of the average of wind speed during the decade was recorder in Tiirikoja where wind speeds varied the most. The most homogenous wind speed during the 24 hour period was registered in Pakri and Virtsu where it changed accordingly 9% and 14%. The highest 24 hour change was registered in inland stations, ranging close to 30%. After analysing data from all stations it was concluded that positive correlation appeared which indicates that the wind speeds ranged during studied periods similarly.
Kirjeldus
Märksõnad
tuuled, kiirus, analüüs, Eesti, bakalaureusetööd