重点提示:(1)东海海上低压继续发展,东南沿海降水有利于污染物清除;华北华中等内陆地区受弱气压场控制,扩散条件持续较差; (2)污染空间分布延续西北高,东南低的形势,华北地区空气质量持续恶化;
图1 2015年01月14日全国城市空气质量状况统计(数据来源:环保部数据中心)
天气形势:
14日区域天气延续前日形势,除东南沿海有降水导致污染气象条件较好,其余大部分内陆地区均处于均压场控制下,地表风力弱,扩散条件差,污染形势不容乐观。
图2 2015年01月14日地面天气图(08:00 UTC+8)和污染气象预报图 (图片来源:中央气象台)
预报回顾:
当日矮马全国AQI预报与实测结果均延续前日空间分布,污染中心出现在华北平原太行山沿线。内陆地区污染物持续累积,空气质量不断恶化,让人难有喘息之机。
图3 2015年01月14日AQI空气质量预报与实况比较(左:矮马预报;右:CNEMC数据平台)
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