《元史·本纪·卷三》
宪宗六年春，北方刮起大风，砂砾飞扬，连白天的光线也阴晦。
六年丙辰春，大风起北方，砂砾飞扬，白日晦冥。
In the spring of the sixth year of Emperor Xianzong's reign, a strong wind blew from the north, and sand and gravel flew, making the daylight dreary.