中(zhōng )央气象台首(shǒu )席预报员 方翀(chōng ):在(zài )春季就是说出现这种(zhǒng )忽冷(lěng )忽热的天(tiān )气现(xiàn )象(xiàng )的话,应该来(lái )说(shuō )还是比(bǐ )较(jiào )常见的。在冬(dōng )天的话(huà ),我(wǒ )国大部地区都是(shì )受到(dào )这种冷(lěng )高压,或者说(shuō )这种冷(lěng )气团的这(zhè )么一(yī )个控(kòng )制或者(zhě )影响,暖气团相对来说(shuō )势力比较(jiào )弱小(xiǎo ),这样的话冷暖(nuǎn )气(qì )流(liú )交汇并(bìng )不是很强,相(xiàng )对(duì )来说气温(wēn )幅度变化(huà )并不是太大。春(chūn )季(jì )正处于这么一(yī )个冷(lěng )气团和暖(nuǎn )气团此消(xiāo )彼(bǐ )长的季(jì )节。当(dāng )冷(lěng )气团势(shì )力(lì )积聚到一定程度,并且(qiě )大(dà )举(jǔ )南(nán )下的(de )时(shí )候,这个(gè )气(qì )温就会大幅度(dù )下降。但是当(dāng )它势力衰弱(ruò ),而暖(nuǎn )气团(tuán )开始(shǐ )加强的(de )时候(hòu ),气温又会大幅度(dù )上升,所以就出(chū )现(xiàn )了这(zhè )种忽冷(lěng )忽(hū )热(rè )的现象。
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