Military Planners Dread the Arctic, 'Where Drones Drop Dead and GPS Goes Haywire'

An anonymous reader shared this report from the Wall Street Journal:

Sending drones and robots into battle, rather than humans, has become a tenet of modern warfare. Nowhere does that make more sense than in the frozen expanses of the Arctic. But the closer you get to the North Pole, the less useful cutting-edge technology becomes. Magnetic storms distort satellite signals; frigid temperatures drain batteries or freeze equipment in minutes; navigation systems lack reference points on snowfields.
During a seven-nation polar exercise in Canada earlier this year to test equipment worth millions of dollars, the U.S. military's all-terrain arctic vehicles broke down after 30 minutes because hydraulic fluids congealed in the cold. Swedish soldiers participating in the exercise were handed $20,000 night-vision optics that broke because the aluminum in the goggles couldn't handle the minus 40 degree Fahrenheit conditions....

An arctic conflict would force war planners back to basics. Extreme cold makes the most common components brittle. Low temperatures alter the physical properties of rubber, causing seals to lose their elasticity and leak. Traces of water or humidity freeze into ice crystals that can scratch pumps and create blockages. Wires should be insulated with silicone rather than PVC, which can crack. Oil and other lubricants thicken and congeal. In most standard hydraulic systems, fluid becomes syrupy and can affect everything from aircraft controls to missile launchers and radar masts. A single freeze-up can knock out an entire weapons platform or immobilize a convoy.

Even the Aurora Borealis interferes with radio communications and satellite-navigation systems, according to the article.

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