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雾霾来得更早!今年秋冬空气质量形势咋样?

2017-09-06 19:36:43   国际在线

金秋9月,按理说应是秋高气爽。但前几天我国北方地区的一次污染过程早早地来了,让人们更加担忧——今年秋冬,雾霾会不会像去年那样严重?

今年秋冬季天气形势不容乐观

2017年是“大气十条”第一阶段目标的收官之年。我国大气环境治理的重点和难点就在于京津冀地区。

近年来,京津冀及周边地区整体空气质量持续改善,但秋冬季改善不明显。特别是2016年秋冬季以来,这一区域先后多次发生重污染天气过程,成为人民群众的“心肺之患”,也大幅抵消了前期改善成果。

数据显示,受2017年1月、2月重污染天气影响,京津冀大气污染传输通道城市上半年PM2.5平均浓度同比增长5.4%,是2013年以来首次出现不降反升的情况,太原、石家庄等城市甚至上升30%以上

这说明,这一地区能否完成今年空气质量改善目标,关键在秋冬季。但环保部日前组织专家进行初步分析研判,今年秋冬季天气形势仍然不容乐观。

专家提出,受北极海冰融化面积扩大、太平洋海温变化等因素影响,西伯利亚冷高压可能弱于常年,冷空气南下频次可能少于常年;同时,太平洋副热带高压较常年增强。这可能造成秋冬季的气温较高,湿度大,不利于大气污染物扩散。

专家表示,北京8月31日以来的这次污染形成过程,与前两年9月中旬的污染过程类似。这预示着与往年相比,今年重污染天气过程相对提前。

资料图片:雾霾笼罩的北京东三环地区(2017年1月3日摄)。 新华社记者李欣摄

日前,环保部会同有关部门和京津冀、山东、山西、河南6省市专门为今年秋冬季出台了大气污染综合治理攻坚行动方案。通过减煤、治理“散乱污”企业、错峰生产等多项举措减少秋冬季大气污染物排放。

环保部大气环境管理司司长刘炳江说,这是我国第一次设定秋冬季大气治理目标——京津冀大气污染传输通道城市秋冬季PM2.5平均浓度同比下降15%,重污染天数同比下降15%。北京、天津、石家庄、太原等重点城市则要下降更多。

他表示,如果各地严格落实各项措施,污染物减排量将是去年的两到三倍,相信今年冬天的空气质量要比去年好一些。

我国发生光化学烟雾事件可能性很小

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