Category: "Pond and puddle patterns"

Puddle gets its grooves (upon freezing), part I

February 16th, 2019
These grooves appear on the surface of frozen puddles. [image:111] Most grooves are straight lines, and most of these also appear to have relatively symmetric sides, such as those marked #s 1, 2, & 4 in the above image. But some, such as #3, have… more »

Slush Fingering and Other Pond Patterns

January 19th, 2012
Here in the Pacific Northwest, we just had our first snowfalls of the season. On the weekend, we had 1 – 2 inches. This was followed on Wednesday by what the Seattle Times newspaper was calling a “megastorm”. But in the end, most areas in the area got… more »

Snow on a Freshly Frozen Pond

January 15th, 2012
Back when I was doing post-doctoral work in Boulder, Colorado, Charlie Knight, the head of my lab, introduced me to strange ice phenomena. The most memorable one happened after the weather had been sub-zero for a few days and then we got some snow. When… more »

An Ice Vase Sprouts From a Bathtub

February 6th, 2011
Someone recently sent me a beautiful image of an ice structure in the shape of a vase. The vase in that case had somehow sprouted out of a frozen birdbath. The thing reminded me of an ice vase I once found on an old plugged-up bathtub in a farmer’s… more »

Ice Forms on Slow-moving Water II: Pancakes and Frozen Foam

January 16th, 2011
An acquaintance of mine recently discovered these odd discs of ice. The discs floated freely in an eddy behind some fallen logs on the Nooksack River’s south fork. See other photos and a short video at… more »

Ice Forms on Slow-moving Water I: Caterpillars and Cellular Dendrites

January 15th, 2011
During my last winter in Japan (2009-2010), I would walk around a neighborhood park on frosty mornings, looking for interesting ice forms. It was in this park that I found one rock (only one!) that on some mornings would sprout hair-like ice, arising… more »