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对流可用位能(convective available potential energy),缩写为 cape,是气象学用语。其物理意义是假想的绝热气块从自由对流高度(level of free convection, 缩写为 lfc)上升到平衡. 气象上cape值 恶劣天气的形成必须具备一定的能量,这个能量称为对流有效位能,用cape表示(cape :convective available potential energy)。 cape是浮力势能,它代表地表边界层.
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