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国庆长假前半段京津冀或现中至重度污染

2016-09-29 14:23:08   新京报

原标题:国庆长假前半段京津冀或现中至重度污染

新京报快讯(记者王硕)国庆节前期,大气扩散条件略差,污染物逐渐累积,其中10月2日-4日,京津冀中南部和河南北部可能出现持续中至重度污染过程。北京污染过程或在3日受降雨影响中断,前期污染程度为轻至中度污染。

29日上午,国家环境监测总站联合北京、天津、河北、河南、山东、山西、内蒙古7省市(自治区)召开视频会商会,对今年国庆节期间京津冀及周边区域空气质量变化趋势进行预报预测。

国家环境监测总站首席预报员汪巍表示,国庆前期出现的中度到重度污染过程,影响范围主要包括河北的石家庄、邢台、保定、邯郸、衡水,以及河南的安阳、新乡和焦作等城市。

北京市环保监测中心高级工程师孙峰告诉记者,在此次区域污染过程中,北京污染程度相对较轻。预计10月1日-2日,受弱气压场控制,北京的空气质量将降至轻度到中度污染水平;3-4日,受明显降水影响,空气质量将明显好转;5-7日,强冷空气来袭,空气质量转为优良。

“3-4日的天气系统比较复杂,有较大的不确定性。”孙峰说,如果出现强对流天气产生明显降水,那么此次污染过程就将在3-4日中断,如果没有降水,就要等到5日冷空气到来。

环保部卫星环境应用中心提醒,国庆节期间是京津冀及周边地区易发生灰霾的时段,同时也是秋季秸秆焚烧的时间段,秸秆焚烧会对进一步加剧当地的空气污染,需要关注。目前,卫星遥感监测已经在个别地区发现火点,但数量尚不多。

  链接

  近两年国庆期间灰霾过程

2014年国庆期间,京津冀及周边区域内,5-7日出现一次灰霾过程,并一直持续到国庆后的11日,其中7日区域灰霾面积最大,达到35万平方公里。

2015年国庆期间,京津冀及周边区域内,也是在5-7日出现明显灰霾过程,其中5日灰霾面积最大,达到35万平方公里。

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