In the development of CASSTA, it was discovered that standard ice and sea surface temperature algorithms produce false warm anomalies in regions of ice fog, which resemble open water on AVHRR imagery because of the spectral properties of ice crystals (Vincent et al., 2008a.
Sequences of images for 30 March and 24 April were subsequently chosen for the analysis since those were relatively clear of ice fog, permitting an accurate calculation of open water.
In the development of CASSTA, it was found that regions in which the differential between Channel 4 and Channel 5 (T45) exceeded 2 C were areas covered by ice fog that cloaked the surface temperature (Vincent, 2006: Vincent et al., 2008b).
Ice fog and frost occur commonly (at least 26% of the time) in the northern latitudes and Arctic regions during winter at temperatures usually less than about -15[degrees]C.
Increased understanding of ice fog microphysics can improve frost and ice fog prediction using forecast models and remote-sensing retrievals, thereby reducing potential hazards to aviation.
When it is 43 [degrees] C below with a slight wind and bright sunshine peeking over the horizon revealing the ice fog hanging over the downtown core of Yellowknife, one wonders about even venturing outside.
They occur in some of the most intriguing parts of the planet: Tithonius Lacus, which encompasses features now designated Tithonium Chasma and Noctis Labyrinthus, often brims with morning mists and ice fogs, while Edom Promontorium lies in Meridiani Planum, where NASA's Opportunity rover landed in January 2004.