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  中(zhōng )央气象台(tái )首席预报员 方(fāng )翀(chōng ):在春(chūn )季就是说出现(xiàn )这(zhè )种忽冷忽热的天(tiān )气(qì )现(xiàn )象的话,应(yīng )该来说(shuō )还是(shì )比(bǐ )较(jiào )常见的。在冬天的话,我(wǒ )国(guó )大(dà )部(bù )地区都(dōu )是受(shòu )到这(zhè )种(zhǒng )冷高(gāo )压,或者(zhě )说这(zhè )种冷气(qì )团的这么(me )一个(gè )控制或(huò )者(zhě )影(yǐng )响,暖气团(tuán )相(xiàng )对(duì )来说(shuō )势力比较弱(ruò )小,这样的(de )话冷暖气流(liú )交汇并不(bú )是很强,相对来说气温幅度(dù )变化并不(bú )是(shì )太大。春季正处于(yú )这么一个冷气团和暖气团(tuán )此消(xiāo )彼长的季(jì )节(jiē )。当(dāng )冷气团势(shì )力(lì )积(jī )聚到一(yī )定程度,并且(qiě )大举南下的时(shí )候,这个气温(wēn )就会大幅度(dù )下(xià )降。但是当它(tā )势力衰弱,而(ér )暖气(qì )团开始(shǐ )加强的时(shí )候,气温又会(huì )大(dà )幅度上升,所以就(jiù )出(chū )现了这种忽(hū )冷(lěng )忽热的现象。

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