Author(s): Jaak Jaagus | Ain Kull
Journal: Estonian Journal of Earth Sciences
ISSN 1736-4728
Volume: 60;
Issue: 4;
Start page: 220;
Date: 2011;
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Keywords: wind directions | climate change | atmospheric circulation | wind rose | Estonia.
ABSTRACT
Changes in the percentages of eight main surface wind directions at 14 meteorological stations in Estonia, Northeast Europe, were studied during 1966–2008. Long-term changes in wind directions are related to variations in the large-scale atmospheric circulation but partly also to changes in the surroundings of the stations and in wind obstacles. Significant alterations in wind directions were determined, and found to be the strongest in the winter season. The percentages of W and SW winds have clear positive trends, while SE, E and NE winds are characterized by negative tendencies in winter. In conclusion, wind directions have probably been shifted from east to west. Differences in trends between the stations are explained by changes in wind obstacles around the stations. The trends in wind roses in Estonia were caused by the intensification of the westerly circulation over the Atlantic/European sector during the winter season.
Journal: Estonian Journal of Earth Sciences
ISSN 1736-4728
Volume: 60;
Issue: 4;
Start page: 220;
Date: 2011;
VIEW PDF
DOWNLOAD PDF Original pageKeywords: wind directions | climate change | atmospheric circulation | wind rose | Estonia.
ABSTRACT
Changes in the percentages of eight main surface wind directions at 14 meteorological stations in Estonia, Northeast Europe, were studied during 1966–2008. Long-term changes in wind directions are related to variations in the large-scale atmospheric circulation but partly also to changes in the surroundings of the stations and in wind obstacles. Significant alterations in wind directions were determined, and found to be the strongest in the winter season. The percentages of W and SW winds have clear positive trends, while SE, E and NE winds are characterized by negative tendencies in winter. In conclusion, wind directions have probably been shifted from east to west. Differences in trends between the stations are explained by changes in wind obstacles around the stations. The trends in wind roses in Estonia were caused by the intensification of the westerly circulation over the Atlantic/European sector during the winter season.
