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  中(zhōng )央(yāng )气象台首席预报(bào )员 方(fāng )翀(chōng ):在春(chūn )季就(jiù )是说出现这种忽(hū )冷忽热的天(tiān )气现象的话,应该(gāi )来说(shuō )还(hái )是比较(jiào )常见的。在冬天(tiān )的话(huà ),我国大部地(dì )区都(dōu )是(shì )受到(dào )这种冷高(gāo )压,或(huò )者说(shuō )这(zhè )种冷气团的这么一(yī )个控制(zhì )或(huò )者影响,暖(nuǎn )气(qì )团(tuán )相对来说势力(lì )比较弱小,这(zhè )样的(de )话(huà )冷暖气流交(jiāo )汇并不(bú )是很强(qiáng ),相对来说气温幅度(dù )变化并不(bú )是太大。春季正(zhèng )处(chù )于(yú )这么(me )一(yī )个(gè )冷(lěng )气团(tuán )和暖气团此消彼长(zhǎng )的季节(jiē )。当(dāng )冷气团势(shì )力(lì )积聚到(dào )一(yī )定(dìng )程度,并且大(dà )举南下的时候,这个(gè )气(qì )温就会(huì )大幅度下(xià )降(jiàng )。但(dàn )是(shì )当(dāng )它势力(lì )衰弱(ruò ),而暖气团(tuán )开始加强的时(shí )候,气温又(yòu )会大幅度(dù )上升,所以就出(chū )现了这种忽冷(lěng )忽热的现象。

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