Noctilucent clouds on the increase, climate change will likely be blamed

Of course, it might just be a negative feedback at work. From NASA: Appearance of Night-Shining Clouds Has Increased First spotted in 1885, silvery blue clouds sometimes hover in the night sky near the poles, appearing to give off their own glowing light. Known as noctilucent clouds, this phenomenon began to be sighted at lower…

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Optical Antics at Sunset

My lovely and talented wife has a habit of being in the right place at the right time to capture nature doing interesting things. This particular shot was taken by cell phone from a moving vehicle in Northern California last night and shows something I’ve never seen before. Those of you looking for the elusive…

The R. W. Wood Experiment

Guest Post by Willis Eschenbach Pushed by a commenter on another thread, I thought I’d discuss the R. W. Wood experiment, done in 1909. Many people hold that this experiment shows that CO2 absorption and/or back-radiation doesn’t exist, or at least that the poorly named “greenhouse effect” is trivially small. I say it doesn’t show…

Disney research figures out “twinned rainbow” optics

From Disney Research (who knew?) Researchers unlock secret of the rare ‘twinned rainbow’ ZURICH — Scientists have yet to fully unravel the mysteries of rainbows, but a group of researchers from Disney Research, Zürich, UC San Diego, Universidad de Zaragoza, and Horley, UK, have used simulations of these natural wonders to unlock the secret to…

Nacreous cloud show at the Arctic Circle

From spaceweather.com An apparition of polar stratospheric clouds is underway around the Arctic Circle. “It is almost as good as the aurora borealis,” says Göran Strand, who took this picture last night from Östersund, Sweden: Eric Schandall of Oslo, Norway, adds this report: “We have seen them for three evenings over Oslo, with the ones…