Greenhouse gases hit threshold unseen in 3,000,000 years
Republican answer to every climate question
The concentration of carbon dioxide in the atmosphere surpassed 400 parts per million for the first time since measurements began, breaching a threshold not seen for 3 million years.
The main greenhouse gas blamed for global warming averaged 400.03 parts per million at a monitoring station on Hawaii’s Mauna Loa volcano yesterday, according to data published today on the U.S. National Oceanic and Atmospheric Administration website. The administration’s data stretches back to 1958.
The reading is considered a landmark by scientists and environmentalists, who say carbon emissions caused by burning fossil fuels are warming the planet and must be reined in before they cause irreversible changes to weather, sea levels and Arctic ice cover.
“We are in the process of creating a prehistoric climate that humans have no evolutionary experience of,” Bob Ward, policy director at the Grantham Research Institute on Climate Change and the Environment…
The last time CO2 levels were this high was at least 3 million years ago, he said. Then, “temperatures were 2 to 3 degrees Celsius higher than pre-industrial times, the polar ice caps were much smaller, and sea levels were about 20 meters higher than today,” he said…
Carbon dioxide can stay in the atmosphere for as much as a century, so levels now may cause warming for decades. The concentration has now increased by more than 40 percent from the pre-industrial mark of 280 parts per million…
The United Nations in 2007 said stabilizing the gas at 400 ppm to 440 ppm may lead to a temperature gain of as much as 2.8 degrees Celsius (5 degrees Fahrenheit). That’s at odds with the goal set out by climate treaty negotiators from more than 190 nations, who have agreed to shoot for limiting the temperature increase to 2 degrees. The global average has already risen by about 0.8 of a degree since pre-industrial times.
As usual, conservative politicians in the United States and their peers in the Flat Earth community pay no attention to landmarks like this – other than to pat themselves on the back for ignoring science. Pimps for the fossil fuel industries, their only notice of ongoing scientific research is to complain that it occurs at all.
In a parallel effect, we have already reached and surpassed the critical mass for stupidity, egregious politics and short-sighted incompetence in the Congress of the United States.