Marken, MNX and Polar Speed have united under one global brand to form Marken, UPS Healthcare Precision Logistics – an ...

"Weather can happen regardless of what the stratosphere is doing," Simpson said. The high-speed polar jet stream typically spins at a height of 5 to 9 miles above the Earth’s surface, in the ...

A strong, stable vortex is like a skater spinning with their arms tucked closely in, holding in an area of cold air over the Arctic. But when there’s a wobble in the rotation, winds in the vortex can ...