qobar

Etymology
From, from , which  said derives from the root , because it "buries" the landscape and obscures the stars. alternatively speculated that it is "perhaps related" to Arabic from the root.

Noun

 * 1)  A dry fog or dry haze, chiefly of the upper Nile but rarely also elsewhere, which has a brownish-yellow color when slight (sometimes only perceptible from a distance) and darker yellow-grey color when thicker (sometimes obscuring the landscape and blotting out the stars).
 * 2) * 1889 January 3,, in a letter to the editor of Nature, volume 39, pages 247-248:
 * Humboldt, viewing qobar in Peru, says . When travelling in Spain, Willkomm remarked qobar at a distance of 3 or 4 miles, yet, on reaching the actual spot, he saw nothing. [...] Bravais saw qobar on the Faulhorn, when his hygrometer was at 51, air saturated with moisture marking 100. In Ethiopia, where I have observed it so low as 20, the hygrometer's mean reading was 41 when qobar was conspicuous. Above 72 it disappeared.
 * Humboldt, viewing qobar in Peru, says . When travelling in Spain, Willkomm remarked qobar at a distance of 3 or 4 miles, yet, on reaching the actual spot, he saw nothing. [...] Bravais saw qobar on the Faulhorn, when his hygrometer was at 51, air saturated with moisture marking 100. In Ethiopia, where I have observed it so low as 20, the hygrometer's mean reading was 41 when qobar was conspicuous. Above 72 it disappeared.