降温幅度可达7至9℃ Cooling rate can be up to 7 to 9 ℃

　　昨日，北京市气象台台长乔林表示，预计今天后半夜到明天早晨，北京将出现浮尘天气。明天上午风力逐渐加大，10时前后到傍晚有6级左右偏北风，阵风可达7、8级，并伴有扬沙。

yesterday,Long boled stand for foremen meteorological observatory in Beijing said,Lobster is expected today to tomorrow morning,Beijing will appear floating dust weather.Tomorrow morning the wind gradually increased,Around 10 to level 6 in the evening before and after the PianBeiFeng,Wind up to 7/Eight level,Accompanied by micrometeorology.

　　预计明天夜间到后天，气温将明显下降，降温幅度可达7至9℃，预计明天夜间最低气温降至-1℃左右，西北和北部山区降至-5至-7℃。

Expect tomorrow night to the day after tomorrow,The temperature will be markedly reduced,Cooling rate can be up to 7 to 9 ℃,Tomorrow night is expected to lowest temperature dropped to around 1 ℃,Northwestern and northern mountains down to - 5 to 7 ℃.

PM2.5浓度近400微克 PM2.5 concentrations nearly 400 micrograms

　　昨天18时，北京市环境保护监测中心实时数据显示，城区和其他大部分地区空气质量为重度至严重污染级别，首要污染物PM2.5（细颗粒物）浓度最高接近400微克。

Yesterday 18 when,Beijing municipal environmental protection monitoring center in real time data display,And other large parts of the city air quality is severely to serious pollution level,The primary pollutants PM2.5(Fine particulate matter)Highest concentration is close to 400 micrograms.

　　市气象局建议，相关单位自觉减少污染物排放，倡导公众低碳出行。

Municipal meteorological bureau recommended,Relevant units to voluntarily reduce their emissions,To advocate the public low carbon travel.

　　针对再次袭来的大风沙尘天气，乔林说，春季2月下旬至5月，是蒙古气旋易于出现和迅速发展的阶段，全球北纬40度附近沙源带分布较多，受季节温度升高、积雪融化等因素影响，地表松动沙土易随大风扬向空中，导致春季沙尘天气多发。

To blow the wind dust weather again,Long boled stand said,In late February to may in spring,Mongolia cyclone is easy to appear and fast developing stage,Sand belt near 40 degrees north latitude distribution more around the world,Affected by seasonal temperature/Factors such as the snow is melting,The surface loose sand is easy with high winds up into the air,In the spring dust weather happens.

“沙尘出现时间正常” "Dust in normal time"

　　北京市气象局首席预报员郭金兰介绍，浮尘天气是指风力较小时，由外部输送而来的；而扬沙天气是风力加大时，本地卷起来的沙尘。她表示，这次扬沙天气不会升级为沙尘暴。

Beijing's weather bureau chief weatherman Guo Jinlan is introduced,Refers to the low wind dust weather,By external transport;While flying sand when the weather is wind up,Local roll up the dust.She said,The flying sand not upgraded to sandstorm weather.

　　针对连日来两次沙尘天气和升温，郭金兰介绍，今年沙尘天出现的时间和气温回升的趋势正常，“春天气温总体趋势越来越高，冷空气来时，温度会小幅下降，再逐渐回升。”（记者邓琦）

On days two dust weather and temperature,Guo Jinlan introduction,Dust days of this year and the trend of the rise of temperature is normal,"Spring temperatures overall trend is more and more high,When the cold air comes,Temperatures can drop slightly,Then gradually recovered."(The reporter Deng Qi)

　　作者：邓琦 (来源：新京报)

The author:Deng Qi (source:The Beijing news)