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A View Of Antarctica From Outer Space

A View Of Antarctica From Outer Space | Sustain Our Earth | Scoop.it

This image photographed almost ten years ago on September 21, 2005, shows a gorgeous, pristine view of Antarctica. It was taken with the AMSR-E instrument onboard NASA’s Aqua satellite. 
Upon zooming in, one can see magnificent details of the awe-inspiring sea ice, and how much space it occupies in relation to the rest of the planet. 
To view more pictures, visit NASA’s site here. 


Via Lauren Moss
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NASA Animation: Watching the Earth Breathe | Climate Central

NASA Animation: Watching the Earth Breathe | Climate Central | Sustain Our Earth | Scoop.it

When Charles Keeling first began measuring the atmosphere’s carbon dioxide levels in the late 1950’s, he noted first that they stood at about 315 parts per million (ppm), or 315 molecules of carbon dioxide for every million molecules of air.

Soon after, though, he found that the concentrations were rising, thanks to the burning of fossil fuels (today, they stand at around 395 ppm and they’re still rising). But he also noticed that the upward curve of CO2 concentrations had a sawtooth pattern. That pattern saw CO2 rise sharply in the fall in the Northern Hemisphere -- when leaves died and fell off the trees to rot -- then drop slightly in spring as new leaves emerged to start drawing in CO2 for photosynthesis. (Leaves fall and sprout in the Southern Hemisphere, too, in an exactly opposite pattern, but there’s so much more ocean and so much less land south of the Equator that the Northern effect is a lot stronger).

Now NASA has put together an animation that shows this process in a much more vivid way. Based on observations from two instruments on the Aqua spacecraft, the animation shows how the disappearance of leaves (green) leads to an increase in atmospheric CO2 (yellow-orange), first in one hemisphere, then in the other — and just as Keeling showed a half-century ago, the effect in the Northern Hemisphere is a lot stronger.

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Watch 62 Years of Global Warming in 13 Seconds

Watch 62 Years of Global Warming in 13 Seconds | Sustain Our Earth | Scoop.it

An amazing 13-second NASA animation depicting how the globe has warmed during the period of 1950 to 2012.

 

From our friends at NASA comes this amazing 13-second animation that depicts how temperatures around the globe have warmed since 1950. You’ll note an acceleration of the temperature trend in the late 1970s as greenhouse gas emissions from energy production increased worldwide and clean air laws reduced emissions of pollutants that had a cooling effect on the climate, and thus were masking some of the global warming signal.

 

The data come from NASA's Goddard Institute for Space Studies in New York (GISS), which monitors global surface temperatures. As NASA notes, “All 10 of the warmest years in the GISS analysis have occurred since 1998, continuing a trend of temperatures well above the mid-20th century average.


Via Lauren Moss, Stephane Bilodeau, Diedert Debusscher
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Diedert Debusscher's curator insight, January 28, 2013 4:25 AM

Why we should care about global warming. And keep working on solutions (they exist).

Mercor's curator insight, January 31, 2013 9:55 AM

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