~Amazing sequence reveals strong warming after 2 months of 2017 long night.
|For the record, Venus-set January 14 2017, South of Cornwallis Island Nunavut Canada. Top of a hill 2 degrees elevation high from the altitude of the camera, the brighter colorful picture shows 2 important features, one is dispersion of colors according to refraction laws, red is refracted less than other optical wavelengths, green much more. The second yellow-red picture occurred just before Venus-set, the colors are truer, there is less overexposure. The 3rd in faint blue is a Venus blue flash, when the planet light beam is behind the top of the hill, the upper most smallest segment of blue, the color refracted most, was carried last bent foremost in a narrow air duct. Compared to same location top of same hill previous sunsets, 4 Venus-sets happened with the least refraction. This was caused by a warmer hill top reducing the inversion lapse rate, despite very cold air temperatures, the coldest of winter so far, which arrived about a day and a half before. The hill was warmed substantially by the lack of wide open clear air, following incredible persistent cloud coverage. When this sequence was taken, mainly clear air lasted for a few days. WD January 25, 2017|