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气象部门分析为何广州出现强龙卷和大冰雹_我的网站

一 |     新华社广州4月28日电（记者田建川）27日下午，受强对流云团影响，广州市局地出现强龙卷和直径大于5厘米的大冰雹。27日深夜，广东省气象局通报了此次极端天气产生的四个原因。　　27日15时前后，广州市白云区钟落潭镇良田村附近出现龙卷风。    

    Chinese Foreign Ministry spokesperson Lin Jian
When asked how China will support the resumption of dialogue between the US and North Korea as US President Donald Trump said he had instructed the Pentagon to significantly scale back joint military exercises between the US and South Korea, citing the high cost of the drills and his good relationship with the North Korean leader, Chinese Foreign Ministry spokesperson Lin Jian said, "We have noted the relevant reports. Maintaining peace and stability on the Korean Peninsula and advancing the political settlement of the Korean Peninsula issue serve the common interests of all parties."
。广东省气象局组织专家团队赴现场灾调，初步勘查了约1.7公里的龙卷影响路径，最大影响宽度约280米，初步研判龙卷风强度为强龙卷等级。　　龙卷是一种很少见的局地性、小尺度、突发性的强对流天气，在极不稳定的天气状况下产生。气象部门初步分析，此次广州出现强龙卷和大冰雹有四个原因：　　一是过去一段时间，来自南海西南暖湿气流持续加强，向广州市输送了大量的水汽和能量，广州长时间处在高温高湿的大气不稳定状态中，近地面附近聚集了大量的不稳定能量。　　二是27日上午近地层暖湿气流继续加大，多个气象观测站录到了异常高的绝对湿度。　　三是27日白天低空急流加强，加剧了“上冷下暖”的不稳定层结。

二 | 　　四是地面中尺度辐合线和高空波动过境作为触发条件，触发强烈的上升气流，使得龙卷的母体风暴强烈发展。

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Published on:19:50:48