airglow, atmosphere, atmosphere influence, night sky, shooting stars

Airglow Makes the Sky Green, Yellow, and Red Too

Look up on a clear sunny day and you will see a blue sky. But is this the true color of the sky? Or is it the only color of the sky? The answers are a little complicated, but they involve the nature of light, atoms, and molecules, and some quirky parts of Earth’s atmosphere ...

Troy Oakes

Airglow seen from space.

Weathering Rocks Hold Clues to Earth’s Great Oxidation Event

About 2.4 billion years ago, Earth’s atmosphere underwent what is called the Great Oxidation Event (GOE). Prior to the Great Oxidation Event, early Earth had far less molecular oxygen than we have today. After the Great Oxidation Event, molecular oxygen began to increase in abundance, eventually making life like ours possible. How the Great Oxidation ...

Troy Oakes

Round rocks stacked on top of each other.

Atmospheric Metal Layers Appear With Surprising Regularity

Twice a day, at dusk and just before dawn, atmospheric metal layers of sodium and other metals begin sinking down through the atmosphere about 90 miles above the city of Boulder, Colorado. The movement of these atmospheric metal layers was captured by one of the world’s most sensitive “lidar” instruments and reported Tuesday in the ...

Troy Oakes

Twice a day, at dusk and just before dawn, a faint layer of sodium and other metals begins sinking down through the atmosphere, about 90 miles above Boulder, Colorado.

Stove, Dome, and Umbrella Effects of Atmospheric Aerosol

The atmospheric planetary boundary layer (PBL), also called the atmospheric boundary layer, is the region of the lower troposphere where Earth’s surface strongly influences temperature, moisture, and wind through the turbulent transfer of air mass. The PBL controls the dispersion of air pollutants, such as atmospheric aerosols, and is closely related to human life. Previous ...

Troy Oakes

Parched landscape with a dead tree.

Japan’s Sky Turned Purple Just Before Typhoon Hagibis

Typhoon Hagibis wreaked destruction all over Japan and has been classified as one of the strongest storms to hit the region in decades. More than 80 people are believed to be dead, with several missing. Some regions have been flooded, with homes completely destroyed. Just before the typhoon hit Japan, skies in the region turned ...

Armin Auctor

Japan's purple sky.