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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Altocumulus castellanus cloud ： ウィキペディア英語版 Altocumulus castellanus cloud Altocumulus Castellanus (ACCAS) is named for its tower-like projections that billow upwards from the base of the cloud. The base of the cloud can form as low as 2,000 metres (6,500 feet), or as high as 6,000 metres (20,000 feet). They are very similar to cumulus congestus clouds, but at a higher level. Castellanus clouds are evidence of mid-atmospheric instability and a high mid-altitude lapse rate. They may be a harbinger of heavy showers and thunderstorms and, if surface-based convection can connect to the mid-tropospheric unstable layer, continued development of Castellanus clouds can produce cumulonimbus clouds. Altocumulus Castellanus clouds are typically accompanied by moderate turbulence as well as potential icing conditions. For these reasons, flight through Altocumulus Castellanus clouds is often best avoided by aircraft. 〔(【引用サイトリンク】title=Weather Tutorial Page 4c - Clouds (NASA Quest) )〕 The appearance of Altocumulus Castellanus early in a sunny day may indicate a high probability the formation of thunderstorms in the afternoon, as they may develop into cumulonimbus storm clouds. ==References== 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「Altocumulus castellanus cloud」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.