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0度线将南压至华南 寒潮来袭如何防御?

2016-01-22 10:07:38   央广网

据报道,近日,最强寒潮来袭,不少地方普遍降温降雪,江苏、江西、安徽等地将会降温到零下几度甚至十几度,0度线将压至华南,就连南方广州也要降温到1度,大家秋衣秋裤快备好。

21日,浙江电力部门工作人员冒雪巡线,清理电力线路。

寒潮自北向南“袭击”我国大部分地区,中央气象台21日连续发布寒潮黄色预警、暴雪黄色预警和海上大风黄色预警。

中央气象台预计,受强冷空气影响,21日夜间至25日,我国中东部地区自北向南将先后有强降温和大风天气,大部地区气温将下降6至10摄氏度,局地降温可达12至14摄氏度;长江中下游地区的最低气温将下降至零下10摄氏度左右,0度线将南压至华南中部一带。安徽中南部、浙江西北部、福建西北部、广东北部等地的部分地区最低气温可能逼近或突破历史极值。长江以北地区最低气温出现时间为23日或24日凌晨,长江以南地区最低气温出现时间为24日或25日凌晨。我国中东部地区日最低气温较常年同期偏低6至8摄氏度,局地超过10摄氏度。

在雨雪方面,预计21日20时至22日20时,浙江大部、安徽南部、江西北部、湖北南部、湖南北部等地有大到暴雪,积雪深度有3至12厘米,其中浙江西部局地有大暴雪(20至25毫米),积雪深度10至20厘米、局地可达20至30厘米。贵州中部和湖南西南部部分地区有冻雨。

中央气象台还发布了海上大风黄色预警。22日夜间至23日白天,受强冷空气影响,我国部分海域阵风最大可达11级。

链接

寒潮防御科普提示一:寒潮天气如何防病保健康?

寒潮是来自北方的强冷空气,是一种严重的灾害性天气过程。由寒潮带来的严寒、大风、霜冻等恶劣天气,给人们的生活带来很多影响,以下我们就针对寒潮对容易对人体引发的疾病做介绍。

(一)寒潮对感冒的影响

寒潮对人体健康有很大影响,是诱发感冒流行的重要因素。寒潮到来时,感冒病人大增,慢性气管炎、哮喘病患者都也往往病情复发或加重。

寒潮为什么能诱发感冒呢?一是寒潮所致的暴冷气候使空气的温度显著降低,鼻咽部的局部粘膜变得干燥,以致发生细小的破裂,感冒病毒便乘虚而入。同时,由于气温下降,鼻咽部的局部温度降至32摄氏度左右。这样的温度正适合粘膜裂口内的病毒生长繁殖。再加上呼吸道受强冷空气刺激,局部血管收缩,使粘膜分泌的免疫球蛋白相应减少,为感冒病毒的入侵和增殖提供了有利条件。二是由于寒潮袭击前后的2-3天内,平均气温和最低气温骤然下降,人的体温调节功能对这种突如其来的寒冷刺激难以适应,如果未能及时添加衣服,就特别容易受凉,引起机体抵抗力下降,给不同类型的感冒病毒入侵以可乘之机。

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