atmosphere influence

Airglow Makes the Sky Green, Yellow, and Red Too

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Airglow seen from space.

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? (Image: via NASA)

Weathering Rocks Hold Clues to Earth’s Great Oxidation Event

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Round rocks stacked on top of each other.

About 2.4 billion years ago, Earth’s atmosphere underwent what is called the Great Oxidation Event (GOE). Prior to the GOE, early Earth had far less molecular oxygen than we have today. (Image: via Pixabay)

Atmospheric Metal Layers Appear With Surprising Regularity

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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.

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. (Image: via Pixabay)

Stove, Dome, and Umbrella Effects of Atmospheric Aerosol

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Parched landscape with a dead tree.

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. (Image: _Marion via Pixabay)

Japan’s Sky Turned Purple Just Before Typhoon Hagibis

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Japan's purple sky.

The sky over Japan turned purple just before Typhoon Hagibis. (Image: Beccalee via Pixabay)

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