30 Apr '13, 8pm

CO2 in atmosphere poised to blow past 400 ppm mark

CO2 in atmosphere poised to blow past 400 ppm mark

Scientists estimate that the last time CO2 was as high as 400 ppm was probably the Pliocene epoch, between 3.2 million and 5 million years ago, when Earth’s climate was much warmer than today. CO2 was around 280 ppm before the Industrial Revolution, when humans first began releasing large amounts of CO2 to the atmosphere by the burning of fossil fuels. By the time [Charles] Keeling began measurements in 1958, CO2 had already risen from 280 to 316 ppm. The rate of rise of CO2 over the past century is unprecedented; there is no known period in geologic history when such high rates have been found. The continuous rise is a direct consequence of society’s heavy reliance on fossil fuels for energy.

Full article: http://grist.org/news/carbon-dioxide-levels-break-400-par...

Tweets

Earth's carbon dioxide levels to hit 400 ppm

Earth's carbon dioxide levels to hit 400 ppm

mnn.com 01 May '13, 5pm

Global carbon dioxide levels will likely reach 400 parts per million within days, scientists report, an ominous milestone ...

CO2 levels in atmosphere reaching 400ppm for first time in 3 million years

CO2 levels in atmosphere reaching 400ppm for fi...

treehugger.com 29 Apr '13, 5pm

Going up, dangerously higher... According to measurements from the Mauna Loa Observatory in Hawaii, a very remote atmosphe...

For first time, single-day CO2 tops 400 ppm

For first time, single-day CO2 tops 400 ppm

climate.nasa.gov 10 May '13, 7pm

The global concentration of carbon dioxide in the atmosphere hit 400 parts per million for the first time in recorded hist...

Another very touching tribute, a trail of shoes that represents the lives of young people lost to gun violence.

Another very touching tribute, a trail of shoes...

wnyc.org 01 May '13, 8am

More than 100 running shoes in different shades of lime green, orange and turquoise are arranged in the shape of a heart o...

New Web Site to Track CO2 Levels As Planet Appr...

e360.yale.edu 24 Apr '13, 3pm

24 Apr 2013: New Web Site to Track CO2 Levels As Planet Approaches 400 PPM As atmospheric concentrations of carbon dioxide...

CO2 crosses dreaded 400 ppm milestone, and science is very disappointed in you

CO2 crosses dreaded 400 ppm milestone, and scie...

grist.org 10 May '13, 10pm

“Del Boca Vista is underwater, thanks to you!” We already told you that carbon dioxide could pass a daily average of 400 p...

A new world?: carbon dioxide concentrations in atmosphere hit 400 ppm

A new world?: carbon dioxide concentrations in ...

news.mongabay.com 11 May '13, 4pm

Featured video: How climate change is messing with the jetstream (05/08/2013) Weather patterns around the globe are gettin...

Climate hits 400ppm of CO2 for first time in 3 million years

Climate hits 400ppm of CO2 for first time in 3 ...

treehugger.com 10 May '13, 9pm

Humanity is all but certain to zoom past 400 parts per million. The big question is, how far past? For a long time, many c...

Last time CO2 hit 400 ppm, temperature was 8C warmer, seas 40m higher than today

Last time CO2 hit 400 ppm, temperature was 8C w...

news.mongabay.com 12 May '13, 2pm

Last time CO2 hit 400 ppm, temperature was 8C warmer, seas 40m higher than today Damian Carrington, The Guardian May 12, 2...

Atmospheric CO2 Hits 400 Parts Per Million Mark..

ens-newswire.com 12 May '13, 11pm

MAUNA LOA OBSERVATORY, Hawaii , May 11, 2013 (ENS) – For the first time in human history, concentrations of the greenhouse...