Questions on global warming

Hot Questions about Climate Change | UCAR
September 21, 2013 – 01:37 pm
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What difference can a few degrees make?

Earth's temperature has gone up 1.4 degrees in the last century. That may not sound like a big deal. But if you've ever fallen through melting ice on a skating pond, you know what difference a few degrees can make.

As Earth heats up, the Sun sucks water from the land, creating droughts in some places. Warmer air absorbs the water like a sponge and then dumps it, big time, flooding other places.

Can people really change the climate? (audio)
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Can people really change the climate?

Earth's climate works like a seesaw—hot stuff on one side, cold stuff on the other. The Sun, icebergs, oceans—even small clouds keep the planet's temperatures in balance.

Add weight to one side of the seesaw, and things go whoah! pretty quickly. For instance, greenhouse gases trap heat. Each second, cars and factories add more than a million pounds of greenhouse gases to the atmosphere. That's a lot of weight to add to one side of a seesaw.

Can't we wait and fix the climate if things get bad? (audio)
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Can't we wait and fix the climate if things get really bad?

When you're driving a car, you can slow down just like that. When you're driving a planet's atmosphere, you need to slow down decades ahead.

Today's greenhouse gases will affect Earth's climate for another hundred years. We're committing ourselves to a long, hot future. How hot depends on how fast we put on the brakes.

It's cold here today—whatever happened to global warming? (audio)
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It's cold here today—whatever happened to global warming?

Most of us tend to notice the things that are in front of us, right now. But climate change happens over many years, even centuries. And to measure those changes, you need to look at the globe as a whole.

Source: www2.ucar.edu
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