City encountered this year the first obvious dust day today. At 10 am on northern suburbs began to significantly influenced by external dust, a sharp rise in PM10 concentration, concentration of single station hours are more than 500 micrograms per cubic meter, and affect the city soon. At 11, according to city 6 area concentration of PM10 hours is 756 micrograms per cubic meter; Northwest of 994 micrograms per cubic meter; Northeast 946 micrograms per cubic meters; Southeast 602 microgram/cubic meters; Southwest 750 microgram/cubic meter.

　　Beijing meteorological observatory dust released on March 28, 10 20 points when blue warning signal, its expected, 28 days, Beijing has the dust weather, please pay attention to guard against. On March 20th night Beijing had slight dust weather, the dust weather today is the first time this year in Beijing dust weather process significantly. Beijing dust weather caused by exogenous input and the local dust, it was reported that a lot of dust storm yesterday of Mongolia.

　　At present, the dust from north to south of Beijing's sphere of influence gradually increased, PM10 pollution levels rise further, please reduce outdoor activities, and shut the doors and Windows.

　　京城今日遭遇今年首個(gè)明顯沙塵天。上午10時(shí)起，北部郊區(qū)開始明顯受到外來沙塵的影響，PM10濃度大幅上升，單站小時(shí)濃度均超過500微克每立方米以上，并很快影響到城區(qū)。11時(shí)數(shù)據(jù)顯示，城六區(qū)PM10小時(shí)濃度為756微克/立方米;西北部為994微克/立方米;東北部946微克/立方米;東南部602微克/立方米;西南部750微克/立方米。

　　北京市氣象臺(tái)3月28日10時(shí)20分發(fā)布沙塵藍(lán)色預(yù)警信號(hào)，其預(yù)計(jì)，28日白天，北京有沙塵天氣，請(qǐng)注意防范。3月20日夜間北京曾出現(xiàn)輕微浮塵天氣，今天的沙塵天氣是北京今年第一次明顯沙塵天氣過程。北京沙塵天氣因外源輸入和本地?fù)P塵造成，據(jù)介紹，昨日蒙古國出現(xiàn)大范圍沙塵暴。

　　目前，沙塵自北向南對(duì)北京的影響范圍逐漸加大，PM10污染水平進(jìn)一步升高，請(qǐng)大家減少戶外活動(dòng)，關(guān)好門窗。

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