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雾霾凶猛!飞机降落三次失败 又从北京飞回香港

2016-11-05 15:22:59   每日经济新闻

立冬未至,雾霾为何如此凶猛?

华北平原三面环山、干旱少雨,燕山脚下的北京更像是一个南面敞口的“簸箕”。中国气象局高级工程师桂海林说,秋季冷空气偏弱,“边界层”高度降低,且大气层结稳定,导致垂直方向上不利于污染物扩散;风速较小,污染物横向难以扩散,若遇偏南风,污染物徐徐向北堆积在山脚下,终酿区域性雾霾。

图片来源:东方IC

“散煤的使用对北方地区采暖季污染有重要贡献。”环保部环境规划院研究员凤凰卫视记者雷宇(微博)说。

谈及雾霾的成因,天津市环境监测中心主任邓小文说,华北地区近期出现的重污染天气与不利的气象条件关系密切。但雾霾频发最大的原因是地区污染物排放总量过大,远远超过了该区域环境所能承载的最大容量。

哈尔滨市环保局对卫星遥感数据解析情况显示,该市西部及西南部的绥化、大庆、吉林等地发现秸秆着火点153处,哈尔滨市自3日17时出现的重度污染为周边秸秆焚烧扩散影响和相对静稳天气叠加所致。

多地限时停产战雾霾,黑色系涨势或难消

目前,京津冀多地均处在重污染应急预警之中,相关部门也紧急联动。

11月2日,北京、天津均启动空气重污染黄色预警,这也是今年10月以来,北京第四次拉响这一级别的污染预警。

据上海证券报报道,环保部大气司司长刘炳江11月3日表示,今年环保部将在总结去年得失的基础上采取更有力的应对“武器”,改进最大的三项举措包括错峰生产、散煤替代、“小散乱污”企业清理等。

错峰生产方面,具体将涉及水泥、铸造和钢铁企业。从11月1日至明年3月,北京、天津、河北、山东、河南等地的20个城市内,水泥企业一律不得生产;铸造企业,除设施到位、较大规模的,一律停产;不达标的钢铁企业也停产。

在“小散乱污”企业清除方面,计划在明年底之前在京津冀地区清除5000多家,今年已经完成了约2600家。“至明年底,将实现1万平方公里的无煤区。

另据新华社报道,环保部表示,今年冬季出现重污染天气的频率和强度可能偏高。预计开始供暖后,重污染天气应对形势可能更加严峻,但空气污染峰值不会达到去年爆表的程度。

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