Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
The Wind Climate in a Mountain Valley in Northern Sweden
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
2000 (English)Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The wind climate in a valley has been studied. Long time data from towers along the valley have been used, together with data from two field campaigns. The campaigns took place during two weeks in May 1999 and two weeks in September 2000. During the field campaigns wind speed and direction were measured, both with small masts and with pilot balloon tracking.

A comparison of single and double theodolite tracking is performed. It is found that single theodolite tracking is good enough to use. The ascent rate of the balloon is seen to be slightly higher than the earlier assumed 4 m/s.

An investigation of the wind field along and across the valley have been done. The result show that high mean wind speed are found at the sites were the valley is rather narrow. The wind direction was then either upstream or downstream the valley. The mean wind speed at Suorva is 6.6 m/s. Channelling effects, forced- and pressure-driven channelling, seem to dominate the winds in the valley giving high speeds.

No correlation is found between the magnitude of the geostrophic wind and the wind in the valley. High winds in the valley is obtained both with high and low geostrophic winds. A peak in the southwesterly direction for the distribution of geostrophic wind is seen. This is due to the common synoptic situation with a low pressure area outside the coast of Norway.

Data from sites across the valley show that the highest wind speeds are found at the northeastern side and the lowest at the southwestern side.

The stratification is found to have strong effect of the air flow around a hill and the local terrain. When the stratification was stable the air was blowing around Jiertasuoloj, an island of about 50 m height. When the air is unstable the air is instead blowing over Jiertasuoloj.

Place, publisher, year, edition, pages
2000. , p. 19
National Category
Meteorology and Atmospheric Sciences
Identifiers
URN: urn:nbn:se:uu:diva-392619OAI: oai:DiVA.org:uu-392619DiVA, id: diva2:1349211
Subject / course
Meteorology
Educational program
Matematisk-naturvetenskaplig linje
Available from: 2019-09-06 Created: 2019-09-06 Last updated: 2019-09-06Bibliographically approved

Open Access in DiVA

AnnaHedblom_2000(6048 kB)2 downloads
File information
File name FULLTEXT01.pdfFile size 6048 kBChecksum SHA-512
2d4d40fe79ee0a6a8b57b9b7bd33aeec129868bb982c27f128b62eb38d75d72acc2afc9c0cb45d150366281fd9d920e60cd73c57767b4a8cf185866e1f87bcf4
Type fulltextMimetype application/pdf

By organisation
Department of Earth Sciences
Meteorology and Atmospheric Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 2 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 14 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf