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Lokala skillnader i lufttemperatur på ön Mefjärd
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
2016 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
Local Air Temperature Differences on the Island Mefjärd (English)
Abstract [sv]

Hur mycket lufttemperaturen varierar på en plats på land beror till stor del av platsens avstånd till havet. Ju längre ifrån havet platsen ligger, ju mindre influeras dess lufttemperatur av havstemperaturen. Hav värms och kyls långsammare än land vilket innebär att maritima platser har en stabilare lufttemperatur i jämförelse med inlandet.

            Syftet med denna studie är att undersöka lufttemperaturer på en liten ö för att bestämma i vilken grad havsavståndet påverkar temperaturvariationer på liten skala. Mätningarna skedde på ön Mefjärd i Stockholms skärgård. Mefjärd har en storlek på ca 3000 x 400 m och är belägen drygt 10 km från Sveriges östkust. Mätningar av lufttemperatur gjordes kontinuerligt mellan den 20/3 och 22/4 både vid strandlinjen och vid mitten av ön. Även havstemperatur, vind och solinstrålning mättes.

Statistiska beräkningar genomfördes och grafer över temperaturer och resterande uppmätt data skapades. Resultaten visade bland annat att lufttemperaturen vid strandlinjen var stabilare och generellt sätt närmare havstemperaturen än vad lufttemperaturen mitt på ön var samt att lufttemperaturen mitt på ön var känsligare för skillnader i solinstrålning än lufttemperaturen vid strandlinjen. Dessa resultat var tydliga trots att studien utfördes på liten skala.

Abstract [en]

The amount of air temperature variation at some location on land depends to a large extent on the distance between the location and the sea. The further from the sea a place is located, the less is its air temperature influenced by the sea temperature. The sea is heated and cooled more slowly than land which means that maritime locations has a more stable air temperature compared to inland locations.

            The purpose of this study is to examine air temperatures on a small island in order to determine to what extent air temperature variations are influences by distance to sea, on a small scale. Measurements were taken on the island Mefjärd in the archipelago of Stockholm. Mefjärd is about 3000 x 400 m in size, located 10 km from the eastern coast of Sweden. Measurements of air temperature was taken continuously between the 20/3 and 22/4 both by the shoreline and in the middle of the island. Sea temperature, wind and solar radiation were also measured.

Statistical calculations were done and figures displaying air temperatures and other measured data were created. The result showed, among other things, that the air temperature by the shoreline was more stable and generally closer to the sea temperature than the air temperature in the middle of the island, and that the air temperature in the middle of the island was more sensitive to changes in sun radiation than the air temperature by the shoreline. These results were apparent even though the study was conducted on a small scale.

Place, publisher, year, edition, pages
2016. , 22 p.
Series
Självständigt arbete vid Institutionen för geovetenskaper, 2016:13
Keyword [en]
air temperature, island, locale temperature variations
Keyword [sv]
lufttemperatur, ö, lokala temperaturvariationer
National Category
Earth and Related Environmental Sciences Meteorology and Atmospheric Sciences
Identifiers
URN: urn:nbn:se:uu:diva-296051OAI: oai:DiVA.org:uu-296051DiVA: diva2:936035
Educational program
Bachelor Programme in Earth Science
Presentation
2016-05-31, Hambergsalen, Institutionen för geovetenskaper, Villavägen 16, Uppsala, 15:40 (Swedish)
Supervisors
Examiners
Available from: 2016-06-13 Created: 2016-06-13 Last updated: 2016-06-13Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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