NASA’s MERRA-2 climate model reveals that the Arctic stratosphere has reached a 40-year record low for December, creating a sudden appearance of polar stratospheric clouds (PSCs) far beyond their usual Arctic confines. Recent observations have revealed a remarkable surge in polar stratospheric clouds (PSCs), often referred to as the most beautiful clouds on Earth due to their aurora-like colors. This sudden increase is attributed to a 40-year record low in temperatures within the Arctic stratosphere for the month of December, as indicated by NASA’s MERRA-2 climate model. PSCs form under extremely cold conditions, typically around -85 °C (-121 °F), in...