北京空气经历污染过程 机构解析气象条件影响|精品无人区无码乱码毛片国产

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  中新社北京11月5日电 (记者 陈杭)受不利气象条件影响,北京正经历一次污染过程。截至5日17时,北京空气质量达重度污染,首要污染物为细颗粒物(PM2.5)。

  北京市生态环境监测中心表示,11月2日起,受不利气象条件影响,京津冀及周边地区污染逐步积累,出现一次区域性污染过程。本地排放叠加区域传输,北京PM2.5浓度持续升高,空气质量逐步转差。

  该中心表示,从污染排放情况看,进入秋冬季后,大气环境容量降低,京津冀区域整体污染排放量增加,短期内遇极端不利气象条件,污染浓度快速积累,导致大气污染物排放总量超过环境容量。

  5日,北京迎来大雾天气,体感阴冷。北京市气象台表示,受偏南暖湿气流影响,北京云量较多,5日早晨有轻雾或雾,大部分地区能见度1公里至3公里,部分地区不足1公里;夜间预计能见度不佳,驾车要保持安全车距,注意交通安全。

  北京市生态环境监测中心表示,6日至7日,受东北高压加强作用,北京扩散条件预计逐渐改善,空气质量有所好转。9日起,北京预计有明显冷空气活动,扩散条件将彻底改善,空气质量预计好转为优良。(完)

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发布于:北京市