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# Coronal Mass Ejections and Earth Climate

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<!-- video src="https://cdn.jwplayer.com/manifests/4eeUlNKP.m3u8" -->
## Video: Coronal Mass Ejections and Earth Climate

[Watch (HLS stream): Coronal Mass Ejections and Earth Climate](https://cdn.jwplayer.com/manifests/4eeUlNKP.m3u8) (4:26)

![Coronal Mass Ejections and Earth Climate](https://cdn.jwplayer.com/v2/media/4eeUlNKP/poster.jpg?width=720)

_Published 2012-06-21. How does earth escape the coronal mass ejections, or CME, that dooms Venus?_


---

Jul 27, 2023 3:25 PM UTC

---

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### Cities Around the World Go Dark for Earth Hour, in a Call for Action on Climate Change

[How to Make <i>Earth</i>](/video/CoXJjZ7h/)

### How to Make _Earth_

---


## Transcript

[ MUSIC ] What safeguards our solar system is our star. The sun provides a shield. Stretching beyond the last planet in its orbit. A force field, that deflects these cosmic rays. But these solar winds can be dangerous too. Especially during outbursts, called coronal mass ejections. Want a vision of Earth gone wrong? Just look at what solar storms do to our sister planet, Venus. They strip away lighter elements in its upper atmosphere. Hydrogen, oxygen, and the molecule they form, water. What's left is a witch's brew of noxious chemicals. Including thick, sulfurous clouds. How has Earth avoided the grim fate of Venus?

We can see the answer as the solar storm approaches Earth. [ MUSIC ]. Our planet has a protective shield all its own. A powerful magnetic field, generated deep within its core. In fact, that's just our first line of defense. Much of the solar energy that gets through, is reflected back to space. By clouds, ice and snow. The energy that Earth absorbs, is just enough to power a remarkable planetary engine. The climate. [ MUSIC ] It's set in motion by the unevenness of solar heating. Due in part to the cycles of day and night. And the seasons that cause warm tropical winds to blow toward the poles.

And cold, polar air toward the equator. Wind currents drive surface ocean currents. This computer simulation, shows the gulf stream winding its way along the coast of North America. [ MUSIC ] This great ocean river carries enough heat energy, to power the industrial world a hundred times over. It breaks down in massive whirlpools. That spread warm tropical waters over northern seas. [ MUSIC ]. Below the surface, they mix with cold, deep currents. That swirl around undersea ledges and mountains. [ MUSIC ] Earth's climate engine has countless moving parts. Tides and terrain, crosswinds and currents.

All working to equalize temperatures around the globe. [ MUSIC ]

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