Smog this week Northern huanghuai duration, or for longest | haze this year |PM2.5_ news
15-18, North China, Huang-Huai will continued smoggy weather. 
Weather Centre forecaster interviewed Lv Mengyao. Weather in China Netcom is expected today (14th), 21st at night, southern part of North China, Huang-Huai, Jac will appear once fog, haze, 17-18 worst days, slight easing 19th weak cold air. 22nd, with the arrival of cold air, smog dissipates. Judging from the present forecast, this is likely to be 2016 years North, lasted the longest haze in huanghuai area.
17-18-worst smog
15-18, North China, Huang-Huai will continued smoggy weather.
The Central Meteorological Station expects starting from tonight, North China, the proliferation of Huang-Huai and other meteorological conditions deteriorated, the fog and haze development. China Lv Mengyao said met Office Weather Centre forecaster is expected tomorrow (15-16), northern China, Huang-Huai and other small air humidity, the wind is the day dominated by mild to moderate haze.
17-18, with increased air humidity and wind speed decreases, air diffusion conditions continue to slip, these areas will be moderate haze, the severe haze in parts. 17-18 will be the most affected by this round of smog, Beijing city to Northeast, southern Hebei, Henan, Shandong West and North, peak PM2.5 concentrations in large areas may reach about 250 micrograms per cubic meter.
Meanwhile, 17, the morning of the 18th, South-Central Hebei, Henan and Northern Hubei, Jiangsu will also appear, such as Northern fog visibility less than 1000 meters, local visibility less than 500 meters.
Lv Mengyao said that in the course of this round, day variation of the concentration of smog and air quality is obvious. From night to morning, due to high humidity, increased fog, haze, visibility is low; by day, haze slightly, air quality and visibility will be improved.
19th, a weak cold front will affect North China, Huang-Huai and other places, but due East path, not completely blown smog, only relief. 19-21, the area still has mild to moderate haze. 22nd, under the influence of the strong cold air, smog dissipates.
This year's longest haze
According to the current forecast, North China, Huang-Huai and the round fog and haze will be 2016 one of the year's longest. Lv Mengyao said the longest smog occur before January 1 to 3rd, Beijing, Tianjin, Shandong, Henan and Shanxi South and East, and moderate to heavy haze in Guanzhong region of Shaanxi Province, parts of PM2.5 concentrations in excess of 350 μg/m in Hebei more than 500 micrograms per cubic meter in the South.
The smog of long duration, and periods in some areas up to severe pollution, residents go out, wear masks, goggles, protective measures. Meanwhile, JAC, Huang-Huai morning may occur in some areas of fog, fog, fog to note the impact on traffic. Before travel, and need the latest information on local highways, timely adjustment of stroke. (Source: China weather network)
Responsible editor: Chen yan SN225
Article keywords:Haze PM2.5
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本周雾霾笼罩华北黄淮 持续时间或为今年来最长|雾霾|pm2.5_新闻资讯
15-18日，华北、黄淮等地将出现持续雾霾天气。 环境气象中心预报员吕梦瑶接受采访。 中国天气网讯 预计，今天（14日）夜间起至21日，华北中南部、黄淮、江淮等地将出现一次雾、霾天气过程，其中17-18日影响最为严重，19日受弱冷空气略有缓解。22日，随着冷空气到来，雾霾消散。从目前的预报来看，这有可能成为2016年来华北、黄淮地区持续时间最长的一次雾霾过程。
17-18日雾霾影响最为严重
15-18日，华北、黄淮等地将出现持续雾霾天气。
中央气象台预计，从今天夜间开始，华北、黄淮等地的气象扩散条件转差，雾、霾天气发展。中国气象局环境气象中心预报员吕梦瑶表示，预计明后天（15至16日），华北、黄淮等地空气湿度较小、风力较大，白天以轻到中度霾为主。
17-18日，随着空气湿度明显增加、风速减小，空气扩散条件继续转差，上述地区将出现中度霾，部分地区重度霾。17-18日将是此轮雾霾影响最为严重的时段，其中北京城区、河北南部、河南东北部至山东西部、北部大片区域PM2.5峰值浓度可能达到250微克/立方米左右。
同时，17、18日早晨，河北中南部、河南、湖北北部、江苏北部等地还将出现能见度不足1000米的大雾，局部能见度将不足500米。
吕梦瑶表示，此轮过程中，霾的浓度和空气质量的日际变化较为明显。夜间至早晨，由于湿度大，雾、霾加重，能见度较低；到了白天，霾略有减弱，空气质量和能见度都将好转。
19日起，一股弱冷空气将影响华北、黄淮等地，但由于路径偏东，不能彻底吹散雾霾，只起到缓解作用。19-21日，上述地区仍有轻至中度霾。22日，受较强冷空气影响，雾霾消散。
今年来持续时间最长雾霾过程
根据目前预报来看，华北、黄淮等地此轮雾、霾天气将成为2016年来持续时间最长的一次。吕梦瑶表示，之前最长的一次雾霾天气出现在1月1日至3日，北京、天津、山东、河南、山西东部和南部、陕西关中地区出现中度至重度霾，部分地区PM2.5浓度超过350微克/立方米，河北中南部超过500微克/立方米。
此次雾霾天气持续时间长、部分地区和时段可达重度污染，居民外出时，可戴口罩、护目镜等，做好防护措施。同时，江淮、黄淮部分地区早晨可能会出现大雾，局地浓雾，需注意雾对交通的影响。出行前，需关注当地高速公路的最新信息，及时调整行程。（来源：中国天气网）
责任编辑：陈琰 SN225
文章关键词： 雾霾 pm2.5
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