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京津冀等48城现重度及以上污染 8城启红色预警

2015-12-23 11:02:38   中新网

专家组通过对京津冀核心区域2+4城市预案实施情况进行初步评估,认为此次京津冀地区应对这次重污染天气过程有几个明显特点。

一是预警发布时间早。提前落实应急减排措施,河北各城市提前2天发布预警、启动响应,北京、天津提前1天。

二是应急减排力度大。河北保定自12月4日起一直保持严于红色预警的应急减排措施,北京、廊坊采取红色预警响应措施,天津、唐山、沧州采取黄色预警响应措施(天津将于23日0时升级为红色预警)。

三是形成了联防联动的工作局面。六个城市从自身特点出发,提前采取有针对性的应急措施,北京加强机动车控制、天津加强工业排放控制、河北加强工业和燃煤控制,周边省市也启动了高级别的减排措施,有效减缓了污染程度。根据督查抽样数据初步估算,各地应急减排量将达到30%左右。

“这次重污染天气的应对措施,做出了充足的提前量,像北京市提前24小时红色预警,对延缓重污染的速度和强度都有明显的效果。”中国科学院大气物理研究所研究员王自发说。“区域的联防联控,有针对性的控制污染源也起到了很好的效果。”

根据数值模拟评估结果,此次北京红色预警应急措施对污染物的减排量约30%左右,周边省份综合应急措施对污染物的减排量约25%左右。

“依据多年监测建立起来区域的排放清单,通过模型模拟,可以看到北京市从19日7时红色预警开始,到22日0时,PM2.5下降比例约在20%~25%之间。”北京工业大学教授程水源说。

责任编辑:张晓伟 CN042
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