upper atmosphere

Some researchers worry this injection of metals in the upper atmosphere could be damaging.

This injection of metals and other compounds into the upper atmosphere has the potential to disturb the delicate balance of elements and molecules in the air, the letter argues.

The unusual hues should continue until Monday, when more unsettled weather will begin to disperse the smoke in the upper atmosphere.

High pressure systems in the upper atmosphere typically drive all of California’s major heat waves, creating a lid over an area as air sinks — a phenomenon sometimes referred to as a heat dome — which prevents hot air from rising, essentially trapping it.

Arrow 2 is designed to destroy short-range and medium-range ballistic missiles while they are flying through the upper atmosphere, about 50km above the Earth.