The new ice-crystal-growth apparatus
July 1st, 2014After a few years in the making, our new device for growing single ice crystals in a well-controlled laboratory environment is nearly ready. We are just adding a few small accessory pieces to allow us to start testing. I was to describe the apparatus at… more »
Halo in the sky? Uh, I don't see no halo...
April 20th, 2014After a few days of fine bright spring weather, the barometer falls and a south wind begins to blow. High clouds, fragile and feathery, rise out of the west, the sky gradually becomes milky white, made opalescent by veils of cirro-stratus. The sun seems… more »
The fun of shooting down your own dang theories
April 10th, 2014Thomas H. Huxley once wrote the famous line: The great tragedy of Science: the slaying of a beautiful hypothesis by an ugly fact. Great man and a catchy phrase, but perhaps he was being a bit overdramatic. To me, the slaying of a “hypothesis” (i.e., pet… more »
Equinox frost I: Patterns on roof, hood, window, and mirror
March 24th, 2014Morning on the spring equinox, the first day of spring, brought a few gifts from winter. I) Film-frost, accentuated with hoar-frost on the cars. See the white of the hoar, following a pattern set down by the thin layer of film-frost. The roof of one… more »
Video of growing ice spike
March 6th, 2014Take about a cup of water, place in a glass flask, then plunge in liquid nitrogen. Watch. What happens in that video is that the water starts to freeze from the bottom and sides of the flask, and the ice also spreads across the top surface. When the… more »
The end of snow
March 1st, 2014This recent front-page article caught my eye: The writer is an avid skier-snowboarder, and thus concerned about the future of his sport. The facts he relates paints a grim picture: - In the past 47 years, a million square miles of spring snowcover has… more »
The cup and the butterfly
February 25th, 2014In early January, while visiting a cold, dry region, I saw this frost on a wooden fencepost. The pattern resembled a cluster of butterflies. In the shade, these "butterflies" were blue, reflecting the blue sky. In the sun, they were bright white: These… more »
Raindrops on ice
February 23rd, 2014When water droplets land on ice, what happens? If the ice is at least several degrees below zero (celcius), the drops freeze quickly, and build up a whitish, bumpy surface. When the ice surface is heated to melting, the droplets vanish into the melt.… more »
Bending of branch and pond
February 11th, 2014Bending bending bending The fir branches are bending They are waiting for more snow The famous Japanese poet Basho wrote a poem like the above, except it was about bamboo bending under the snow load. I was… more »
Hoar that grows down and out
February 9th, 2014It had been a continued spell of cold days and nights, the ground snow-free, the air clear and dry. No film-frost on the cars in the morning, and no spikes of hoar frost sticking up on grass or post. The only signs of ice had been the frozen pond and… more »
