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  中央气(qì )象台(tái )首席预(yù )报员(yuán ) 方翀(chōng ):在春(chūn )季(jì )就是说(shuō )出(chū )现(xiàn )这(zhè )种忽冷忽热的天气现象的话,应(yīng )该来(lái )说还(hái )是(shì )比较常见的。在冬(dōng )天的话,我国(guó )大部(bù )地区都是受到这种(zhǒng )冷高(gāo )压(yā ),或(huò )者说这种(zhǒng )冷(lěng )气团(tuán )的这(zhè )么一(yī )个控制或(huò )者影(yǐng )响,暖气团相对来说势(shì )力比较弱小(xiǎo ),这(zhè )样的话冷(lěng )暖(nuǎn )气(qì )流交汇(huì )并不是(shì )很强(qiáng ),相对(duì )来说气温(wēn )幅度变化(huà )并(bìng )不是太(tài )大。春(chūn )季(jì )正处(chù )于(yú )这么一个冷气团和(hé )暖气(qì )团(tuán )此消彼长的季(jì )节。当(dāng )冷气(qì )团势力积聚到一定程度,并(bìng )且大举南下(xià )的时候,这个(gè )气温就会大幅(fú )度(dù )下降。但是(shì )当它势(shì )力衰(shuāi )弱,而暖气团开(kāi )始加强的时(shí )候,气(qì )温又会大幅(fú )度上升,所以(yǐ )就出(chū )现了这种忽(hū )冷忽热的现(xiàn )象。

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