高一地理必须修读一第2课时第3节.ppt

第二章　地球上的大气 第三节　常见天气系统 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 1．理解冷锋、暖锋、准静止锋影响下的天气特点。 2．理解气旋、反气旋控制下的天气特点。 3．运用天气系统示意图，解释主要天气特点及带来的影响。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 1．锋面及其特点 (1)概念：_________两种性质不同的气团相遇，它们之间的交界面称为锋面。 (2)特点：锋面两侧空气的温度、湿度、气压都有明显的差别，锋面附近常伴有一系列的云、_________、_________等天气。 知识点一　锋与天气 (重难系数：★★★☆☆　高考指数：★★★☆☆) 冷暖 大风 降水 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 2．锋的分类 锋面类型 概念 过境时的天气 过境后的天气 冷锋 _________主动向_________方向移动的锋 常出现云层增厚、雨雪、大风等天气 气压_________，气温降低，天气_________ 暖锋 _________主动向_________方向移动的锋 常出现_________降水或雾 气温上升，气压_________，天气转晴 准静止锋 冷暖气团势力相当，使锋面来回摆动的锋 锋面摆动持续时间较长，常形成持续性_________天气 冷气团 暖气团 升高 转好 暖气团 冷气团 连续性 下降 阴雨 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 影响我国的锋主要是哪种？试举例说明。 提示：冷锋。如冬季的寒潮，夏季北方的暴雨。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Sli