The top of a @F02470@ layer which is confined by a low-level temperature @I03146@ and gives the appearance of the horizon (which it actually obscures) when viewed from above, against the sky.
Source: PAC, 1990, 62, 2167. (Glossary of atmospheric chemistry terms (Recommendations 1990)) on page 2190 [Terms] [Paper]
Citation: 'fog horizon' in IUPAC Compendium of Chemical Terminology, 3rd ed. International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. https://doi.org/10.1351/goldbook.F02471 RISBibTexEndNote