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The Bora ((ブルガリア語:бора), (クロアチア語:bura), (ギリシア語:μπόρα), (イタリア語:bora), (スロベニア語:burja), (トルコ語:bora), (ポーランド語:burza)) is a northern to north-eastern katabatic wind in the Adriatic, Croatia, Montenegro, Italy, Bulgaria, Greece, Slovenia, Poland, Russia (Novorossiysk) and Turkey. The same root is found in the name of the Greek mythological figure of Boreas/Βορέας, the North Wind. Historical linguists speculate that the name may derive from a Proto-Indo-European root *gworh- meaning mountain.〔''The Oxford introduction to Proto-Indo-European and the Proto-Indo-European World,'' J. P. Mallory, Douglas Q. Adams Oxford University Press, 2006 (p121 )〕 In Greek, the word "bora" (μπόρα) describes an intense summer rain that lasts for a few minutes. In Croatian "burno" means "violently" and is commonly used to describe the weather. == Features == The changeable Bora can often be felt all over Dalmatia, Istria, the Slovenian Littoral, Trieste, and the rest of the Adriatic east coast. It blows in gusts. The Bora is most common during the winter. It blows hardest, as the meteorologist Baron Ferdinand von Wrangel explained it by extending Julius Hann's explanation of Alpine katabatic winds to the north Adriatic,〔 F. von Wrangel, "Die Ursachen der Bora in Noworossisk", ''Repertorium für Meteorologie'' 40 (1876:238-40); the Bora of the Karst was described by F. Seidel, "Bermerkungen über die Karstbora", 'M.Z.'' 8 (1891:232-35), noted by Julius (von) Hann, ''Handbook of Climatology'' Robert DeCourcy Ward, tr. (1903): see (Petra Seibert, "Hann’s Thermodynamic Foehn In the Adriatic tradition, the Bora comes from three mouths: Trieste, Rijeka and Senj. Theory and its Presentation in Meteorological Textbooks in the Course of Time" ).〕 when a polar high-pressure area sits over the snow-covered mountains of the interior plateau behind the Dinaric coastal mountain range and a calm low-pressure area lies further south over the warmer Adriatic. As the air grows even colder and thus denser at night, the Bora increases. Its initial temperature is so low that even with the warming occasioned by its descent it reaches the lowlands as a cold wind.〔v. Hann 1903.〕 The wind takes two different traditional names depending on associated meteorological conditions: the "light bora" ((イタリア語:Bora chiara)) is Bora in the presence of clear skies, whereas clouds gathering on the hilltops and moving towards the seaside with rain or snow characterize the "dark bora" (''Bora scura''). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「bora wind」の詳細全文を読む スポンサード リンク
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