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昨日北京空气质量达重度污染 2日到5日北京等华北地区将有轻度雾霾
央广网北京9月3日消息(记者王楷 杜希萌)据中国之声《新闻和报纸摘要》报道,北京市环保局监测数据显示,昨天上午10点,北京空气质量指数达203,属于重度污染级别。今冬明春,北方重污染天气过程是否提前到来?
中央气象台昨晚预报,2日到5日白天,北京、天津西部、河北中部、山西中部等地大气扩散条件一般,上述地区有轻度霾,局地中度霾。5日开始,受降水和弱冷空气影响,上述部分地区空气污染扩散和清除条件逐渐转好。
中国环境科学研究院大气环境首席科学家柴发合:主要是大气湿度在增加,基本上处在一个静稳的状态。对污染物扩散不利。但是到了中午前后,对流加强,这部分问题马上就可以解决。
眼下这轮雾霾天气因何而起?柴发合对此进行了介绍。
柴发合:基本是有规律的。一个是秋冬转换季节,你看每年十一前后,差不多都会有一个比较重的污染过程。第二个是采暖季开始,特别是东北,比北京提前半个月,每次都会发生重污染过程。
近日,环保部会同发改委、财政部等十部委和京津冀晋鲁豫等六省市共同发布《京津冀及周边地区2017—2018秋冬季大气污染综合治理攻坚行动方案》。方案明确,今冬明春北京、天津、石家庄、太原采暖季PM2.5平均浓度同比下降比例为25%。
环保部大气环境管理司司长刘炳江:今年大气污染治理攻坚行动安排的大气污染物减排任务量是去年的两倍到三倍之间。减排量放在那,如果天气稍微有利点儿,我相信今年空气质量应该会比去年好一些。
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