Arctic Oscillation

An amazing site of ice crystals and sunlight in the eastern sky on Christmas eve morning.

January 6, 2023 – The last weeks of 2022 brought a bone-chilling assault of arctic cold with snow and relentless strong winds to the midwest. The high winds pushed temperatures down into negative double digits, impacting most of the United States east of the Rockies for about a week. Here in the Midwest, the dangers from the extreme cold were real, and the constant winds made it easy to imagine what it is like to be in a winter storm high in the Arctic. The cold temperatures froze moisture on contact, and the clear morning sky on Christmas eve displayed a beautiful parhelic circle and halo with iridescent red and blue sundogs flanking the sun above the eastern horizon. The sun was at the center of the icy atmospheric phenomenon and appeared like a giant glowing diamond floating in a fog of ice crystals. Flocks of foraging winter birds at the road’s edge fighting the fierce winds were swept hundreds of yards within seconds when flushed. Lapland longspurs wintering far from their Arctic nesting range were battling powerful gusts as they searched for seeds trapped among the rocks along gravel roads. Large flocks of Horned larks dotted the windswept fields and road edges as they foraged for much-needed nourishment during the extreme weather. Like other birds here during the winter in Northern Illinois, the Lapland longspur and Horned lark generate heat by feeding continuously on spilled seeds left by man and nature during daylight hours to help them stay warm during extreme weather events. At night the small birds fluff their feathers, find hollows and wind blocks and even shiver to generate heat. During harsh winter conditions of strong winds and cold, I have witnessed longspurs taking breaks from the strong winds by using small depressions in the snow, like little snow caves, during the day to protect themselves before going back to feeding. The somewhat rare weather event known as a “bomb cyclone” struck Christmas week and was a challenge for wildlife. The heavy snows first predicted here in Northern Illinois did not transpire. An accumulation of several inches or more did arrive with the powerful winds creating a hazardous situation for all living things. The strong winds produced some bitter cold but helped by sweeping the fields and roadways of snow, making it easier for the birds to forage and get to those energy-producing seeds that keep them alive through the nights during the unusually rapid Arctic cold blast.

Horned larks foraging along a gravel road in Iroquois County during strong winds and bitter cold.