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Observation of Local Wind Fields and Cyclonic Atmospheric Eddies over the Eastern Black Sea Using Envisat Synthetic Aperture Radar Images © 2010
| Content Provider | Semantic Scholar |
|---|---|
| Author | Alpers, Werner Ivanov, Andrei Dagestad, F. |
| Copyright Year | 2010 |
| Abstract | The Black Sea is bordered to the east by a coastal mountain range of variable height having several gaps through which airflow from the northeast can be fun neled onto the sea. When the offshore northeasterly coastal winds are strengthened by atmospheric forc ing, like the passage of an atmospheric front, and when they have speeds above 15 ms–1, they are called boras. This term has been adopted in analogy to the strong winds, which are often encountered at the east coast of the Adriatic Sea and which are also called bo ras (Prettner, 1866; Yoshino, 1979; Smith, 1987; Gohm, Mayr, 2005; Askari et al., 2003; Belu ic et al., 2006; Dorman et al., 2007; Cushman Roisin, Koro tenko, 2007; Signell et al., 2009). Since these strong winds are mainly countered in the coastal areas near Novorossiysk (44.7° N, 37.8° E), they are also termed Novorossiyskaya boras (Новороссийская бора, 1959; Бурман, 1969). These winds can attain speeds of more than 30 ms–1 and can be quite hazardous, es pecially for coastal ship traffic and harbor operations (Новороссийская бора,1959; Бурман, 1969; Ива нов, 2008). s › Bora winds are local down slope winds, where cold air is pushed over a coastal mountain range due to the presence of a high pressure gradient or by the passage of a cold front over the mountain range. They are en countered in mountainous coastal regions, where the mountain range is not too high (typically below 600 m) such that the adiabatic warming of the descending cold air is small (Prettner, 1866; Klemp and Durran 1987; Gohm and Mayr, 2005), in contrast to Föhn and Chinook winds where adiabatic warming is significant. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.ifm.uni-hamburg.de/institute/staff/alpers/documents-alpers/2010-observation-of-local-wind.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
