据气象专家介绍，3月以来我国北方地区气温偏高，气象条件总体有利于沙尘天气的生成。本次影响我国北方地区的沙尘主要起源于蒙古国，由于蒙古气旋发展强盛（15日02时中心气压980百帕），沙尘随着气旋后部的冷高压东移南下影响了我国北方大部地区。

According to meteorological experts, since March, the temperature in northern China has been on the high side, and the meteorological conditions are generally conducive to the formation of dust weather. The dust affecting northern China mainly originated in Mongolia. Due to the strong development of Mongolia cyclone (980 HPA at 02:00 on the 15th), the dust moved eastward and southward with the cold high pressure behind the cyclone, affecting most of northern China.

北京市气象台介绍，3月份观象台常年平均（1981年至2010年平均）沙尘日数为2.4天，最多为12天（1954年），2000年以来最多9天，出现在2001年。最近一次沙尘暴出现在2015年4月15日。2020年3月18日曾出现扬沙天气。

According to the Beijing Meteorological Observatory, the annual average (1981-2010) dust days at the observatory in March were 2.4 days, up to 12 days (1954), and up to 9 days since 2000, which occurred in 2001. The last sandstorm occurred on April 15, 2015. There was sand blowing weather on March 18, 2020.

来源：北京日报客户端 | 记者 骆倩雯

Source: Luo Qianwen, client of Beijing Daily

编辑：王琼

Editor: Wang Qiong

流程编辑：郭丹

Process editor: Guo Dan