Arctic marginal seas

The Novorossiisk boras most often emerge when the center of the European part of Russia is occupied by an intensive cold anticyclone, at the southern margin of which strong northeasterly winds develop. Often, boras are induced in the rear parts of the so-called diving cyclones that travel from Scandinavia and Karelia to the Lower Volga or Southern Urals. In all these cases, the boras on the Black Sea coasts are related to the penetration of cold air into the southern part of the European part of Russia. Usually, boras are observed in the wintertime, while the most intensive events are confined to the end of the fall to the beginning of the winter, when the sea is still warm as in the summer, while invasions of very cold Arctic air from the continent are already possible. 

Anderson, L.G. (1995) Chemical oceanography of the Arctic and its shelf seas, in Arctic Oceanography Marginal Ice Zones and Continental Shelves (eds W.O. Smith Jr. and J.M. Grebmeier), American Geophysical Union, Washington, DC, pp. 183-202. 

Gas hydrates occur naturally in the Arctic and in deep-sea continental margins. Their importance lies in their abfiity to trap gases within crystalline masses, thereby acting rather like natural gas storage tanks . Under normal conditions of temperature and pressure, gas clathrates collapse and release the guest molecules, for example CH4 is released from a gas clathrate of composition CH4-6H20 ... 

---