The effects of a slope angle, inversion strength and the eddy transfer coefficient on katabatic winds
The purpose of this research is to view the effects of a slope angle, inversion strength and the eddy transfer coefficient on katabatic winds. An equation for downslope motion is used to see how much the wind speed changes with time and then the wind speed after three hours is compared with observed...
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ftskemman:oai:skemman.is:1946/34514 2023-05-15T15:59:55+02:00 The effects of a slope angle, inversion strength and the eddy transfer coefficient on katabatic winds Ingibjörg Jóhannesdóttir 1994- Háskóli Íslands 2019-10 application/pdf http://hdl.handle.net/1946/34514 en eng http://hdl.handle.net/1946/34514 Jarðeðlisfræði Vindar Vindhraði Vindmælingar Sauðárkrókur Staðarhóll (býli Dalasýsla) Eyrarbakki Rannsóknir Thesis Bachelor's 2019 ftskemman 2022-12-11T06:51:58Z The purpose of this research is to view the effects of a slope angle, inversion strength and the eddy transfer coefficient on katabatic winds. An equation for downslope motion is used to see how much the wind speed changes with time and then the wind speed after three hours is compared with observed wind speed at three locations in Iceland; Sauðárkrókur Airport, Staðarhóll and Eyrarbakki. The results show that the calculated wind speeds in Sauðárkrókur Airport and Staðarhóll are considerably higher than the observed wind speeds. That is considered to be because the eddy transfer coefficient is in reality larger than was estimated and the slope angles are in reality inhomogeneous. The calculated wind speeds in Eyrarbakki are lower than the observed wind speeds, the cold northerly flow may be as much a land-breeze as a katabatic wind. Tilgangurinn með þessu verkefni er að skoða áhrif halla landslags, styrk hitahvarfs og kvikustreymisstuðuls á fallvinda. Jafna sem lýsir hreyfingu loftmassa undan halla er leidd út og notuð í þeim tilgangi að skoða hvernig hraðinn breytist með tíma. Hraðinn eftir þrjár klukkustundir er skoðaður og borin saman við mældan vindhraða á þrem stöðum á Íslandi; flugvelli Sauðárkróks, Staðarhóli og Eyrarbakka. Niðurstöður sýna að fræðilegur vindhraði á flugvelli Sauðárkróks og Staðarhóli er töluvert meiri en mældur vindhraði. Þessi munur er talinn vera vegna þess að kvikustreymisstuðullinn er í raun hærri en gert var ráð fyrir og halli landslags er ójafn. Fræðilegur vindhraði á Eyrarbakka er minni en mældur, norðlæga vindáttin gæti allt eins verið landgola eins og fallvindur. Thesis Dalasýsla Iceland Sauðárkrókur Skemman (Iceland) Sauðárkrókur ENVELOPE(-19.639,-19.639,65.746,65.746) Dalasýsla ENVELOPE(-22.000,-22.000,65.250,65.250) Eyrarbakki ENVELOPE(-21.149,-21.149,63.863,63.863) Staðarhóll ENVELOPE(-18.881,-18.881,66.148,66.148) |
institution |
Open Polar |
collection |
Skemman (Iceland) |
op_collection_id |
ftskemman |
language |
English |
topic |
Jarðeðlisfræði Vindar Vindhraði Vindmælingar Sauðárkrókur Staðarhóll (býli Dalasýsla) Eyrarbakki Rannsóknir |
spellingShingle |
Jarðeðlisfræði Vindar Vindhraði Vindmælingar Sauðárkrókur Staðarhóll (býli Dalasýsla) Eyrarbakki Rannsóknir Ingibjörg Jóhannesdóttir 1994- The effects of a slope angle, inversion strength and the eddy transfer coefficient on katabatic winds |
topic_facet |
Jarðeðlisfræði Vindar Vindhraði Vindmælingar Sauðárkrókur Staðarhóll (býli Dalasýsla) Eyrarbakki Rannsóknir |
description |
The purpose of this research is to view the effects of a slope angle, inversion strength and the eddy transfer coefficient on katabatic winds. An equation for downslope motion is used to see how much the wind speed changes with time and then the wind speed after three hours is compared with observed wind speed at three locations in Iceland; Sauðárkrókur Airport, Staðarhóll and Eyrarbakki. The results show that the calculated wind speeds in Sauðárkrókur Airport and Staðarhóll are considerably higher than the observed wind speeds. That is considered to be because the eddy transfer coefficient is in reality larger than was estimated and the slope angles are in reality inhomogeneous. The calculated wind speeds in Eyrarbakki are lower than the observed wind speeds, the cold northerly flow may be as much a land-breeze as a katabatic wind. Tilgangurinn með þessu verkefni er að skoða áhrif halla landslags, styrk hitahvarfs og kvikustreymisstuðuls á fallvinda. Jafna sem lýsir hreyfingu loftmassa undan halla er leidd út og notuð í þeim tilgangi að skoða hvernig hraðinn breytist með tíma. Hraðinn eftir þrjár klukkustundir er skoðaður og borin saman við mældan vindhraða á þrem stöðum á Íslandi; flugvelli Sauðárkróks, Staðarhóli og Eyrarbakka. Niðurstöður sýna að fræðilegur vindhraði á flugvelli Sauðárkróks og Staðarhóli er töluvert meiri en mældur vindhraði. Þessi munur er talinn vera vegna þess að kvikustreymisstuðullinn er í raun hærri en gert var ráð fyrir og halli landslags er ójafn. Fræðilegur vindhraði á Eyrarbakka er minni en mældur, norðlæga vindáttin gæti allt eins verið landgola eins og fallvindur. |
author2 |
Háskóli Íslands |
format |
Thesis |
author |
Ingibjörg Jóhannesdóttir 1994- |
author_facet |
Ingibjörg Jóhannesdóttir 1994- |
author_sort |
Ingibjörg Jóhannesdóttir 1994- |
title |
The effects of a slope angle, inversion strength and the eddy transfer coefficient on katabatic winds |
title_short |
The effects of a slope angle, inversion strength and the eddy transfer coefficient on katabatic winds |
title_full |
The effects of a slope angle, inversion strength and the eddy transfer coefficient on katabatic winds |
title_fullStr |
The effects of a slope angle, inversion strength and the eddy transfer coefficient on katabatic winds |
title_full_unstemmed |
The effects of a slope angle, inversion strength and the eddy transfer coefficient on katabatic winds |
title_sort |
effects of a slope angle, inversion strength and the eddy transfer coefficient on katabatic winds |
publishDate |
2019 |
url |
http://hdl.handle.net/1946/34514 |
long_lat |
ENVELOPE(-19.639,-19.639,65.746,65.746) ENVELOPE(-22.000,-22.000,65.250,65.250) ENVELOPE(-21.149,-21.149,63.863,63.863) ENVELOPE(-18.881,-18.881,66.148,66.148) |
geographic |
Sauðárkrókur Dalasýsla Eyrarbakki Staðarhóll |
geographic_facet |
Sauðárkrókur Dalasýsla Eyrarbakki Staðarhóll |
genre |
Dalasýsla Iceland Sauðárkrókur |
genre_facet |
Dalasýsla Iceland Sauðárkrókur |
op_relation |
http://hdl.handle.net/1946/34514 |
_version_ |
1766395809932247040 |