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河南遭遇極端暴雨！雨為啥這么大？何時(shí)結束？權威解答！
2021-07-21 14:42
來(lái)源： 央視財經(jīng)

河南遭遇極端暴雨！雨為啥這么大？何時(shí)結束？權威解答！

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人工智能朗讀：

河南這次暴雨為什么這么強？專(zhuān)家分析主要原因有三個(gè)。

臺風(fēng)影響。臺風(fēng)“煙花”雖然距離我國還有小一千公里，卻遠程控制了河南暴雨。在“煙花”和副熱帶高壓的氣流引導下，大量的水汽通過(guò)偏東風(fēng)源源不斷從海上輸送到陸地，在河南集結成雨。

地形原因。偏東氣流在河南遇到太行山和伏牛山后，在山前出現輻合抬升，地形導致降雨范圍集中，雨勢更強。

大氣環(huán)流形勢穩定，導致降雨持續時(shí)間長(cháng)。目前只有等臺風(fēng)“煙花”更靠近我國后，環(huán)流形勢出現調整，截斷水汽來(lái)源，河南的雨才能停。

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[編輯：施冰冰]