今天傍晚时分，我观赏筼筜书院的菊花展后，在白鹭洲公园附近发现，天空的云朵特别漂亮，大片大片的“鱼鳞云”安静地聚集在空中。

   朵朵白云既像一片片的鱼鳞，又像一堆堆皑皑的白雪。有的的云层还组成不同的形状，或像蓝色的海洋、或像直直的河流、或像弯弯曲曲的小水沟，在湛蓝天空的映衬下，显得格外壮观。

   据悉，“鱼鳞云”在气象学上称为“透光高积云”，是由于秋冬季强冷空气来前，云层逐渐压低、加厚，加上高层气流不稳定而形成的。

 透光高积云如果变化不大，预示着晴天。如果高积云厚度继续增厚，并逐渐融合成层，则显示天气将有变化，甚至会出现降水。

  有人误认为透光高积云是地震云，气象学家表示气象上根本没有"地震云"的概念，透光高积云是高空槽在影响，一般冷空气过境，碰上暖湿气流就会下雨。如果有冷空气但没下雨，这说明空气并不湿热，在高空中保留着一定的湿度;如果高空也很干燥，就会是晴朗无云的天气。

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