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Visual snow syndrome (VSS) is an uncommon neurological condition in which the primary symptom is that affected individuals see persistent flickering white, black, transparent, or coloured dots across the whole visual field. Other common symptoms are palinopsia, enhanced entoptic phenomena, … See more In addition to visual snow, many of those affected have other types of visual disturbances such as starbursts, increased afterimages, floaters, trails, and many others. Visual snow likely … See more • In May 2015, visual snow was described as a persisting positive visual phenomenon distinct from migraine aura in a study by … See more • Visual Snow Initiative • Visual snow syndrome at NIH • http://visualsnowsyndrome.com/ See more The causes are unclear. The underlying mechanism is believed to involve excessive excitability of neurons within the cortex of the brain, specifically the right lingual gyrus and left cerebellar anterior lobe of the brain. Persisting visual … See more It is difficult to resolve visual snow with treatment, but it is possible to reduce symptoms and improve quality of life through treatment, … See more WebIt has been measured at the snow surface and at the top of the atmosphere, but its dependence on wavelength, snow grain size, and surface roughness is still unknown. … notion link to folder on computer
The Optical Properties of Ice and Snow in the Arctic Basin
WebOct 28, 2024 · A snow gauge is a variation of a rain gauge adapted for cold-weather use. A large graduated cylinder is mounted on a fence or pole with the top open. Snowfall accumulation inside can be easily viewed and measured using this arrangement. Snow gauges have challenges: accuracy will suffer when it’s windy or a mixture of rain, sleet, … WebSep 8, 2024 · Optical backscattering of snow on the ground has been addressed in only a few studies thus far ( Piironen and others, 2000; Shkuratov and others, 2002; Kaasalainen and others, 2003 ), with a few peaks observed for some samples. These studies have focused mainly on the effects of impurities. WebFeb 26, 2015 · Ice optical properties depend on the snow effective grain size, which is prognosed by the snow aging scheme described next. Figure 1. Open in figure viewer PowerPoint. Schematic diagram for coupling of SNICAR into SSiB-3 land surface model (LSM). Variables defined in text. Blue boxes represent LSM variables or processes; orange … notion list in table