A bird in this year's most heavy haze days (pictured) proliferation | | | smog _ air pollution news

　　Satellite haze haze over 1.4 million square kilometers

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16th up, North, and yellow Huai, to have into most "grey" of one week, suffered 2016 years autumn yilai continued time most long, and range widely of fog-haze weather, Beijing Jin JI, to air appeared serious pollution, more to PM2.5 concentration over 500 μg/cubic metres, Shijiazhuang more is appeared has continuous over 50 hours of serious pollution, AQI index frequently "burst table".

Satellite monitoring showed, 16th haze to 757,000 square kilometres. 17th morning haze extending to about 1.01 million square kilometers, about 1.422 million sq km 18th, 19th, haze is still a wide range, about 1.41 million square kilometers. 19th night begins, North China, Huang-Huai haze into the most serious period, significantly expand the scope and 20th day haze spread to Jilin, Liaoning, Beijing, Tianjin, Hebei, Shandong, Henan, Shaanxi, Shanxi, Hubei, Anhui, Jiangsu and other 12 provinces and municipalities. (Note: white moving parts for high clouds in the picture, point grey area is the haze. From: third satellite, sunflower 8th satellite and surface PM2.5 monitoring results)

This is the sixth time since October this year widespread haze. According to statistics from the Central meteorological station since October, Beijing, Tianjin and Hebei and its neighboring area meteorological conditions of air pollution dispersion deviation, there have been 5 times continuing widespread haze (1 more than last year). Beijing-Tianjin-Hebei haze on average for 18 days, 7 days from a year earlier, Beijing, Tianjin, Shijiazhuang, more smog days, respectively from a year earlier to 12 days and 6 days and 15 days.

　　One photo shows the heavy haze days development process

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16th day, affected by weak cold air, air quality in Beijing, Tianjin and other places, on the air quality index a "clean and green", and Hebei, Henan, "open a haze haze", the air quality is poor. At night, begin to spread air pollutants, air gradually slip in Beijing, Tianjin and other places, the color change from green to yellow. 17th and 18th, pollutants continued to expand, and to increase the scope, map North, Huang-Huai, Jac large area gradually blockbusters into yellow, red, until the "red-hot" appear "explosion". The night of 19th, increased air humidity, pollution is more serious, continuing "red-hot" and will continue, as at 20th 12 o'clock, Shijiazhuang "table burst" time of 43 hours.

　　Static stability weather creating "super long" haze days

Why is this fog-haze scope so much for so long? Meteorological Center of China Meteorological Administration environment engineer Gui Hailin is mainly under the influence of static stability on the weather. In recent days, the atmosphere in a stable state, vertical and horizontal proliferation diffusion conditions are very poor, and it lasts a long time. Meanwhile, 19th, under the influence of wind, humidity of the air increases, absorbing more pollutants in the air, pollutants accumulated between regional transfers, hazes showed a gradual increasing trend. In addition, emissions of pollutants from industrial production and heating in winter has led to pollution, develop. Meanwhile, North China plain, the terrain is rather special, Yanshan, West of the Taihang mountains in the North, affecting the mobility of air, pollutant accumulation of easily in the Piedmont region.

Expect the heaviest haze days 22nd faded.

> Editor: Li Peng

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高空俯瞰中国今年最重灰霾天(图)|扩散|空气污染|雾霾_新闻资讯

　　卫星看霾霾区超过140万平方公里

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　　16日起，华北、黄淮等地相继陷入最“灰暗”的一周，遭遇2016年入秋以来持续时间最长、范围广泛的雾-霾天气，京津冀等地空气出现严重污染，多地PM2.5浓度超过500微克/立方米，石家庄更是出现了连续超过50小时的严重污染，AQI指数频繁“爆表”。

　　卫星监测显示，16日中国霾区为75.7万平方公里。17日上午霾区扩展至101万平方公里左右，到18日上午约为142.2万平方公里，19日上午，霾区范围依然很广泛，约为141万平方公里。19日夜间开始，华北、黄淮等地霾天气进入最严重时段，范围明显扩大，20日灰霾天波及吉林、辽宁、北京、天津、河北、山东、河南、陕西、山西、湖北、安徽、江苏等12省市。（注明：图中白色移动的部分为高云，位置不变的灰色地带就是霾区。 来源于：风云三号卫星、葵花8号卫星和地面PM2.5监测结果）

　　这是今年10月以来第六次大范围雾霾过程。据中央气象台统计，10月以来，京津冀及周边地区空气污染扩散气象条件偏差，已出现5次持续性大范围霾天气过程（比去年同期多1次）。京津冀平均霾日数为18天，较去年同期偏多7天，北京、天津、石家庄的霾日数较去年同期分别偏多12天、6天和15天。

　　一图展示今年最重灰霾天发展过程

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　　16日白天，受弱冷空气影响，北京、天津等地空气质量较好，空气质量指数图上一片“清新绿”，而河南、河北“一霾未平一霾又起”，空气质量不佳。夜间起，空气污染物开始扩散，北京、天津等地空气逐渐转差，颜色由绿变黄。17日晚上只18日，污染物范围继续扩大、并加重，图上华北、黄淮、江淮大片区域逐渐大片转为黄色、红色直至“红得发紫”，多地出现“爆表”。19日夜间，空气湿度增加，污染更加严重，继续“红得发紫”，并将持续，其中截至20日12时，石家庄“爆表”时间达到43小时。

　　静稳天气制造“超长”灰霾天

　　为什么本次雾-霾天气范围如此大时间如此长？中国气象局环境气象中心高级工程师桂海林分析主要是受到静稳天气的影响。最近几天，大气都处于非常稳定状态，垂直扩散能力和水平扩散条件均极差，且持续时间长。同时，19日起，受南风影响，空气湿度增大，吸附空气中更多的污染物，污染物持续累积，区域之间互相传输，霾呈现逐渐加重的趋势。另外，来自工业生产的污染物排放和冬季取暖也导致污染发展。同时，华北平原地形也比较特殊，北部为燕山、西部为太行山，影响了空气的流动性，污染物容易在山前地区堆积。

　　预计，本次最重灰霾天将于22日逐渐消散。

>责任编辑：李鹏

文章关键词：
扩散 空气污染 雾霾 上帝

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