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我国大陆尤其是平原地区,在冬天很少有雷电和大雨,这是因为:(1)冬季大陆上空气的对流作用不兴旺——也就是说空气比较稳定,因而少雷电和大雨(此地着重指雨的强度)。(2)冬天空气中(尤其在华北、西北)含的水份很少,所以也就不会有大雨。然而在海洋上,冬季却可见到雷电,这是因为冬季海洋面上的空气比较上层的空气要冷的多,相差到一定程度,便能产生较猛烈的对流作用,进而可能发生雷电。
In mainland China, especially in the plain areas, there are few thunder and heavy rains in winter. This is because: (1) The convection of the air on the mainland does not thrive during the winter - that is, the air is relatively stable, and therefore there is less lightning and heavy rain. The intensity of the rain). (2) In the winter air (especially in North China and Northwest China), there is little water, so there will be no heavy rain. However, in the ocean, thunder and lightning can be seen in winter. This is because the air on the ocean surface in the winter is much colder than the air on the upper layer. If it is different to a certain extent, it can produce more violent convection, and lightning may occur.