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单词 bottom wind
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bottom wind
bottom wind n. English regional (a motion of the air causing) a local disturbance of the surface of a body of water, esp. a lake, during generally calm weather.In quot. 1709, the name is associated with the theory that the wind originates in the release of gases at the bottom of the sea, though it is otherwise used almost invariably in or with reference to the Lake District of north-west England, where later writers have attributed the phenomenon to the local topography (cf. quot. 1997).
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the world > the earth > weather and the atmosphere > weather > wind > [noun] > wind said to rise from lakes
bottom wind1709
1709 T. Robinson Ess. Nat. Hist. Westmorland & Cumberland i. 7 This first Commotion, excited by the said Fermentation, we call a Bottom Wind, which is presently discovered by Porpices, and other Sea-Fish, which..by their playing, give the Mariners the first Notice of an approaching Storm.
1774 T. Pennant Tour Scotl. 1772 47 The water of Derwentwater is subject to violent agitations, and often without any apparent cause, as was the case this day; the weather was calm, yet the waves ran a great height, and the boat was tossed violently with what is called a bottom wind.
1793 J. Dalton Meteorol. Observ. i. x. 51 Derwent lake is one of those few which are agitated at certain times, during a calm season, by some unknown cause. This phenomenon is called a bottom wind.
1825 J. Otley Conc. Descr. Eng. Lakes (ed. 2) 21 I doubt, whether they are ever formed when no wind is stirring: and if such as term as Bottom wind must still be retained, I think it ought to be referred to the bottom of the atmosphere, rather than the bottom of the lake.
1997 W. Rollinson Dict. Cumbrian Dial. Bottom winds, fierce winds which suddenly blow down a fell-side, often disturbing one part of a lake while leaving another section perfectly calm. They are especially noticeable on Derwent-water and Bassenthwaite Lake.
extracted from bottomn.adj.
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