yellow sand phenomenon
A weather phenomenon in which fine sand particles from deserts in China and Mongolia are carried by strong winds to East Asia, causing hazy skies and health concerns. Often referred to simply as 黄砂 (こうさ).
See also: 黄砂
In spring, the sky sometimes turns yellow and hazy due to the yellow sand phenomenon.
Because of the yellow sand phenomenon, there were days when we couldn't hang laundry outside.
黄砂 is the more common, shorter term for the same phenomenon. 黄砂現象 is a more formal or explanatory compound, literally 'yellow sand phenomenon'.
Compound of 黄砂 (こうさ, 'yellow sand') and 現象 (げんしょう, 'phenomenon'). The term directly describes the meteorological event.